{"id":5723,"date":"2025-12-24T02:35:38","date_gmt":"2025-12-24T02:35:38","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5723"},"modified":"2025-12-24T02:36:28","modified_gmt":"2025-12-24T02:36:28","slug":"gb-t-3098-2-2015-coarse-thread-nut-properties-standard","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/pt\/blog\/gb-t-3098-2-2015-coarse-thread-nut-properties-standard\/","title":{"rendered":"GB\/T 3098.2-2015: Norma para propriedades de porcas com rosca grossa"},"content":{"rendered":"<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Sum\u00e1rio do artigo<\/h2>\n<p style=\"margin-bottom: 15px;\">Este artigo oferece uma explora\u00e7\u00e3o abrangente da norma GB\/T 3098.2-2015, estruturada para facilitar a consulta e a aplica\u00e7\u00e3o pr\u00e1tica em contextos de engenharia:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Introdu\u00e7\u00e3o: Vis\u00e3o geral e aplicabilidade da norma.<\/li>\n<li>Materiais: Composi\u00e7\u00e3o qu\u00edmica e diretrizes de tratamento t\u00e9rmico.<\/li>\n<li>Propriedades mec\u00e2nicas: Requisitos de carga de prova.<\/li>\n<li>Requisitos de dureza: Valores de dureza especificados.<\/li>\n<li>Estilos de porcas e compatibilidade de parafusos: Compatibilidade com parafusos.<\/li>\n<li>Considera\u00e7\u00f5es sobre torque: Informa\u00e7\u00f5es sobre a aplica\u00e7\u00e3o de torque.<\/li>\n<li>FAQ: Respostas \u00e0s d\u00favidas profissionais mais comuns.<\/li>\n<\/ul>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Introdu\u00e7\u00e3o<\/h2>\n<p style=\"margin-bottom: 15px;\">A norma GB\/T 3098.2-2015 estabelece as propriedades mec\u00e2nicas e f\u00edsicas de porcas com rosca grossa fabricadas em a\u00e7o carbono ou a\u00e7o liga, testadas em temperaturas ambientes entre 10 \u00b0C e 35 \u00b0C. Ela \u00e9 crucial para garantir a confiabilidade e a seguran\u00e7a de conjuntos de fixa\u00e7\u00e3o em setores como constru\u00e7\u00e3o civil, automotivo e de fabrica\u00e7\u00e3o de m\u00e1quinas.<\/p>\n<p style=\"margin-bottom: 15px;\">Esta norma centra-se nas cargas de prova, dureza e especifica\u00e7\u00f5es dos materiais para evitar falhas sob carga. Os engenheiros devem aplicar estas diretrizes durante o projeto e o controle de qualidade para selecionar as porcas adequadas aos parafusos, otimizando o desempenho e a durabilidade do conjunto.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Materiais<\/h2>\n<p style=\"margin-bottom: 15px;\">As porcas devem ser fabricadas em a\u00e7o carbono com composi\u00e7\u00f5es qu\u00edmicas espec\u00edficas para atingir as propriedades mec\u00e2nicas requeridas. O tratamento t\u00e9rmico, como t\u00eampera e revenido, \u00e9 obrigat\u00f3rio para classes de propriedades mais elevadas, a fim de garantir temperabilidade suficiente, resultando em uma estrutura martens\u00edtica de aproximadamente 90% na se\u00e7\u00e3o roscada antes do revenido.<\/p>\n<p style=\"margin-bottom: 15px;\">Principais considera\u00e7\u00f5es para a sele\u00e7\u00e3o de materiais:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Limitar o teor de carbono para controlar a dureza e a fragilidade.<\/li>\n<li>Manter um teor m\u00ednimo de mangan\u00eas para garantir resist\u00eancia e temperabilidade.<\/li>\n<li>Limitar o uso de f\u00f3sforo e enxofre para evitar fragiliza\u00e7\u00e3o.<\/li>\n<li>Aplicar t\u00eampera e revenido para as classes 05, 8 (D&gt; M16), 10 e 12.<\/li>\n<\/ul>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">Composi\u00e7\u00e3o Qu\u00edmica<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">Classe de propriedade<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Material<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Tratamento t\u00e9rmico<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">C (%) m\u00e1x.<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Mn (%) min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">P (%) m\u00e1x.<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">S (%) m\u00e1x.<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Opcional<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.060<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Temperado e revenido<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.048<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.058<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Opcional<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.060<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Opcional<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.060<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Opcional<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.060<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 1 D \u2264 M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Opcional<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.060<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 1 D &gt; M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Temperado e revenido<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.048<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.058<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Temperado e revenido<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.048<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.058<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">A\u00e7o carbono<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Temperado e revenido<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.58<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.45<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.048<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.058<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 15px;\">Nota: Para classes que exigem t\u00eampera e revenido, os materiais devem apresentar temperabilidade adequada. As composi\u00e7\u00f5es qu\u00edmicas devem ser avaliadas de acordo com as normas pertinentes.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Propriedades Mec\u00e2nicas<\/h2>\n<p style=\"margin-bottom: 15px;\">As porcas devem suportar cargas de prova especificadas sem falhar, representando a carga m\u00e1xima segura em conex\u00f5es mec\u00e2nicas. Esses valores garantem a integridade estrutural sob tens\u00e3o.<\/p>\n<p style=\"margin-bottom: 15px;\">Orienta\u00e7\u00f5es para a candidatura:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Selecione a classe de propriedade com base nos requisitos de carga da montagem.<\/li>\n<li>Verificar as cargas de prova atrav\u00e9s de testes \u00e0 temperatura ambiente.<\/li>\n<li>Considere fatores como o encaixe da rosca e a compatibilidade do material.<\/li>\n<\/ul>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">Cargas de prova (N)<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Fio<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Tom<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">04<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">05<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">7100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8250<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">9500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12140<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">14800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">16300<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">7640<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">11700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">13500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">17200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">20900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">23100<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">11000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">14500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">16800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">19400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">24700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">33200<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">13900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">18300<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">21600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">24900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">31800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">38100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">42500<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">22000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">29000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">34200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">39400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">50500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">60300<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">67300<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">32000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">42200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">51400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">59000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">74200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">88500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">100300<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M14<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">43700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">57500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">70200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">80500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">101200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">120800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">136900<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">59700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">78500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">95800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">109900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">138200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">164900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">186800<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">73000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">96000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">121000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">138200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">176600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">203500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">230400<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M20<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">93100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">122500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">154400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">176400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">225400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">294000<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M22<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">115100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">151500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">190900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">218200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">278800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">321200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">363600<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M24<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">134100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">176500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">222400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">254200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">324800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">374200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">423600<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">174400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">229500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">289200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">330500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">422300<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">486500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">550800<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">213200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">280500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">403900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">516100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">594700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">673200<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M33<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">263700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">347000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">437200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">499700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">638500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">735600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">832800<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">310500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">408500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">514700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">588200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">751600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">866000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">980400<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">370900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">488000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">614900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">702700<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">897900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1035000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1171000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 15px;\">Nota: A carga de prova representa aproximadamente a resist\u00eancia m\u00ednima \u00e0 tra\u00e7\u00e3o que a porca pode suportar.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Requisitos de dureza<\/h2>\n<p style=\"margin-bottom: 15px;\">A dureza garante que as porcas resistam \u00e0 deforma\u00e7\u00e3o e mantenham a integridade sob carga. Os valores s\u00e3o especificados nas escalas Vickers (HV), Brinell (HB) e Rockwell (HRC), com convers\u00f5es de acordo com a norma ISO 18265.<\/p>\n<p style=\"margin-bottom: 15px;\">Orienta\u00e7\u00f5es pr\u00e1ticas:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Utilize o teste Vickers com carga m\u00ednima de 98 N para maior precis\u00e3o.<\/li>\n<li>Ajuste de acordo com o tamanho da porca; valores m\u00ednimos diferentes se aplicam para D &gt; M16.<\/li>\n<li>Verificar se o tratamento t\u00e9rmico posterior atende aos requisitos da classe.<\/li>\n<\/ul>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">Requisitos de dureza<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\" rowspan=\"2\">Fio<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">04<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">05<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">10<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">12<\/th>\n<\/tr>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00e1ximo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5 \u2264 D \u2264 M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">HV<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">188<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">272<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">130<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">150<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">272<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">295<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M16 &lt; D \u2264 M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">188<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">272<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">146<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">170<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">302<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">233<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">272<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">272<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">353<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5 \u2264 D \u2264 M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">HB<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">179<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">124<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">143<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">190<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">280<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M16 &lt; D \u2264 M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">179<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">139<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">162<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">287<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">221<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">259<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">336<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5 \u2264 D \u2264 M16<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">HRC<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">26<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">26<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">29<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M16 &lt; D \u2264 M39<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">26<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">30<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">26<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">26<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 15px;\">Observa\u00e7\u00f5es: Para porcas estilo 2 na classe 8, a dureza m\u00ednima \u00e9 de 180 HV (171 HB). Para porcas estilo 2 na classe 10, \u00e9 de 302 HV (287 HB, 30 HRC). Para porcas estilo 2 na classe 12, \u00e9 de 272 HV (259 HB, 26 HRC).<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Estilos de porcas e correspond\u00eancia de parafusos<\/h2>\n<p style=\"margin-bottom: 15px;\">As porcas s\u00e3o classificadas em estilos (0 fina, 1 padr\u00e3o, 2 alta) com faixas de di\u00e2metro espec\u00edficas e classes de parafusos compat\u00edveis para garantir a resist\u00eancia da montagem e evitar danos ou falhas.<\/p>\n<p style=\"margin-bottom: 15px;\">Recomenda\u00e7\u00f5es para o processo de sele\u00e7\u00e3o:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Use porcas finas (estilo 0) como contraporcas com uma porca padr\u00e3o ou alta, apertando primeiro a porca fina.<\/li>\n<li>Para obter a pr\u00e9-carga ideal, combine a classe da porca com a classe de propriedade m\u00e1xima do parafuso.<\/li>\n<li>Considere o passo da rosca para aplica\u00e7\u00f5es de rosca fina versus rosca grossa.<\/li>\n<\/ul>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">Estilos de porcas, di\u00e2metros e compatibilidade de parafusos<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Classe de propriedade<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">04<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">05<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 1 (Padr\u00e3o)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M16x1,5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M16<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 2 (Alto)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M16\u2264D\u2264M39 \/ M8x1\u2264D\u2264M16x1,5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M16x1,5<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Estilo 0 (Fino)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M5\u2264D\u2264M39 \/ M8x1\u2264D\u2264M39x3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Parafuso correspondente Classe m\u00e1xima<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">–<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Considera\u00e7\u00f5es sobre o torque<\/h2>\n<p style=\"margin-bottom: 15px;\">A norma n\u00e3o especifica o torque de ruptura para porcas, alinhando-se com as normas ISO 898-2 e DIN 267-24, para evitar confus\u00e3o entre torque e pr\u00e9-carga como refer\u00eancias de projeto. Em vez disso, o foco deve ser em cargas de prova, resist\u00eancia \u00e0 fadiga e dureza para conex\u00f5es confi\u00e1veis.<\/p>\n<p style=\"margin-bottom: 15px;\">Na pr\u00e1tica, o torque aplicado a porcas ou parafusos em conjuntos se converte parcialmente em for\u00e7a de aperto, influenciada por atrito, lubrificantes e componentes como arruelas. Para refer\u00eancia, considere os valores de torque de classes de parafusos correspondentes com o mesmo di\u00e2metro, mas sempre priorize os c\u00e1lculos de engenharia para aplica\u00e7\u00f5es espec\u00edficas.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Perguntas frequentes<\/h2>\n<ol style=\"list-style-type: decimal; padding-left: 20px; margin-bottom: 20px;\">\n<li style=\"margin-bottom: 15px;\"><strong>Por que o processo de t\u00eampera e revenimento \u00e9 necess\u00e1rio para classes de pestanas mais altas?<\/strong><br \/>\nAumenta a temperabilidade, garantindo uma estrutura martens\u00edtica para maior resist\u00eancia e durabilidade sob altas cargas, conforme os requisitos da Tabela 3.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>Como devem ser utilizadas porcas finas (tipo 0) em montagens?<\/strong><br \/>\nMonte como contraporcas com uma porca padr\u00e3o ou alta; aperte primeiro a porca fina contra a pe\u00e7a e, em seguida, a porca externa contra ela para evitar que se solte.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>E se a dureza de uma porca exceder o m\u00e1ximo especificado?<\/strong><br \/>\nA dureza excessiva pode indicar riscos de sobret\u00eampera, levando \u00e0 fragilidade; repita os testes ou rejeite os lotes para que estejam em conformidade com os limites da Tabela 6 e para manter a ductilidade.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>\u00c9 poss\u00edvel usar porcas com parafusos de classes de resist\u00eancia inferiores?<\/strong><br \/>\nSim, mas utilize parafusos da classe m\u00e1xima recomendada pela norma para evitar subutiliza\u00e7\u00e3o; sempre verifique a pr\u00e9-carga da montagem e o desempenho em fadiga.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>Como testar cargas de resist\u00eancia \u00e0 tra\u00e7\u00e3o com porcas com precis\u00e3o?<\/strong><br \/>\nUtilize os m\u00e9todos descritos na Cl\u00e1usula 9 a temperaturas entre 10\u00b0C e 35\u00b0C; aplique carga axial sem rota\u00e7\u00e3o, garantindo o engate completo da rosca para simular as condi\u00e7\u00f5es reais.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>Por que os limites de f\u00f3sforo e enxofre s\u00e3o mais rigorosos para classes de prote\u00ednas resfriadas rapidamente?<\/strong><br \/>\nN\u00edveis mais baixos previnem a fragiliza\u00e7\u00e3o durante o tratamento t\u00e9rmico, aumentando a resist\u00eancia e a confiabilidade em aplica\u00e7\u00f5es de alta exig\u00eancia.<\/li>\n<\/ol>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Sum\u00e1rio do Artigo Este artigo oferece uma explora\u00e7\u00e3o abrangente da norma GB\/T 3098.2-2015, estruturada para facilitar a consulta e a aplica\u00e7\u00e3o pr\u00e1tica em contextos de engenharia: Introdu\u00e7\u00e3o: Vis\u00e3o geral e aplicabilidade da norma. Materiais: Composi\u00e7\u00e3o qu\u00edmica e diretrizes de tratamento t\u00e9rmico. Propriedades Mec\u00e2nicas: Requisitos de carga de prova. Requisitos de Dureza: Valores de dureza especificados. Tipos de Porcas e Compatibilidade de Parafusos: Compatibilidade com [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5723","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/comments?post=5723"}],"version-history":[{"count":3,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5723\/revisions"}],"predecessor-version":[{"id":5726,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5723\/revisions\/5726"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/media?parent=5723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/categories?post=5723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/tags?post=5723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}