{"id":5559,"date":"2025-12-19T08:33:42","date_gmt":"2025-12-19T08:33:42","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5559"},"modified":"2025-12-19T08:33:42","modified_gmt":"2025-12-19T08:33:42","slug":"mechanical-performance-standards-for-fasteners-gb-t-3098-1-2010","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/pt\/blog\/mechanical-performance-standards-for-fasteners-gb-t-3098-1-2010\/","title":{"rendered":"Normas de desempenho mec\u00e2nico para fixadores: GB\/T 3098.1-2010"},"content":{"rendered":"<div style=\"font-family: Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px;\">\n<p style=\"text-align: justify; margin-bottom: 20px;\">A norma GB\/T 3098.1-2010 especifica as propriedades mec\u00e2nicas de parafusos, porcas e pinos de a\u00e7o carbono e a\u00e7o liga. Esta norma define classes de propriedades, materiais e requisitos de desempenho para garantir a confiabilidade em diversas aplica\u00e7\u00f5es. Aplica-se a elementos de fixa\u00e7\u00e3o com di\u00e2metros nominais de rosca de M1,6 a M39, operando em temperaturas entre -50 \u00b0C e +300 \u00b0C, com disposi\u00e7\u00f5es para desempenho em temperatura ambiente.<\/p>\n<h2 style=\"color: #0056b3; margin-top: 40px; border-bottom: 1px solid #ddd; padding-bottom: 10px;\">\u00cdndice<\/h2>\n<ul style=\"list-style-type: none; padding-left: 0; margin-bottom: 40px;\">\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #007bff;\" href=\"#marking-materials\">Sistema de classifica\u00e7\u00e3o para classes de propriedades e materiais<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #007bff;\" href=\"#mechanical-properties\">Propriedades Mec\u00e2nicas e F\u00edsicas<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #007bff;\" href=\"#faq\">Perguntas frequentes (FAQ)<\/a><\/li>\n<\/ul>\n<div id=\"marking-materials\">\n<h2 style=\"color: #0056b3; margin-top: 40px; border-bottom: 1px solid #ddd; padding-bottom: 10px;\">Sistema de classifica\u00e7\u00e3o para classes de propriedades e materiais<\/h2>\n<h3 style=\"color: #333; margin-top: 20px;\">5. Sistema de classifica\u00e7\u00e3o para classes de propriedades<\/h3>\n<p style=\"text-align: justify; margin-bottom: 20px;\">A classifica\u00e7\u00e3o de resist\u00eancia para parafusos, porcas e pinos consiste em dois n\u00fameros separados por um ponto:<\/p>\n<ul style=\"margin-bottom: 20px; padding-left: 20px;\">\n<li>O(s) n\u00famero(s) \u00e0 esquerda do ponto representam 1\/100 da resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal (R).<sub>m, nom<\/sub>) em MPa.<\/li>\n<li>O n\u00famero \u00e0 direita do ponto \u00e9 10 vezes a raz\u00e3o entre a resist\u00eancia ao escoamento nominal (resist\u00eancia ao escoamento inferior R).<sub>eL, nom<\/sub>), ou a tens\u00e3o nominal em 0,2% extens\u00e3o n\u00e3o proporcional (R<sub>p0.2, nom<\/sub>), ou a tens\u00e3o nominal a 0,0048d de extens\u00e3o n\u00e3o proporcional para fixadores (R<sub>pf, nom<\/sub>) \u00e0 resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal (R<sub>m, nom<\/sub>) .<\/li>\n<\/ul>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Exemplo: Um fixador com resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal R<sub>m, nom<\/sub> = 800 MPa e \u00edndice de escoamento 0,8 tem classe de propriedade \u201c8.8\u201d. Para produtos com propriedades de material semelhantes, mas capacidade de carga reduzida, marque como \u201c08.8\u201d (ver 10.4).<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">O produto da resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal e da rela\u00e7\u00e3o de escoamento fornece a resist\u00eancia ao escoamento nominal em MPa. O Ap\u00eandice A apresenta dados sobre a rela\u00e7\u00e3o entre a resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal e o alongamento ap\u00f3s a ruptura para cada classe de propriedade.<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">A marca\u00e7\u00e3o e rotulagem das classes de propriedade devem seguir o item 10.3 e, para capacidade de carga reduzida, o item 10.4. Este sistema de marca\u00e7\u00e3o pode ser aplicado a dimens\u00f5es al\u00e9m da faixa padr\u00e3o (d &gt; 39 mm) se as Tabelas 1 e 2 forem atendidas.<\/p>\n<h3 style=\"color: #333; margin-top: 20px;\">6. Materiais<\/h3>\n<p style=\"text-align: justify; margin-bottom: 20px;\">A Tabela 1 especifica os limites de composi\u00e7\u00e3o qu\u00edmica e as temperaturas m\u00ednimas de revenido para os a\u00e7os utilizados em cada classe de propriedades. As composi\u00e7\u00f5es qu\u00edmicas devem estar em conformidade com as normas nacionais aplic\u00e1veis.<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Nota: Certos elementos qu\u00edmicos podem ser restritos ou proibidos por regulamenta\u00e7\u00f5es em alguns pa\u00edses. Aten\u00e7\u00e3o deve ser dada quando aplic\u00e1vel.<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Os requisitos do Cap\u00edtulo 4 da norma GB\/T 5267.3 para materiais de fixa\u00e7\u00e3o aplicam-se a fixadores galvanizados a quente.<\/p>\n<h4 style=\"color: #333; margin-top: 20px; text-align: center;\">Tabela 1: Materiais<\/h4>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px; border: 1px solid #ddd; font-size: 12px;\">\n<thead>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">Classe de propriedade<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">Tratamento t\u00e9rmico e de materiais<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"5\">Limites de composi\u00e7\u00e3o qu\u00edmica (an\u00e1lise de fundi\u00e7\u00e3o, %)<sup>um<\/sup><\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">Temperatura de t\u00eampera (\u00b0C min)<\/th>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"2\">C<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">P<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">S<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">B<sup>b<\/sup><\/th>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">min<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">m\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">m\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">m\u00e1ximo<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">m\u00e1ximo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\" rowspan=\"2\">4.6<sup>cd<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\" rowspan=\"5\">A\u00e7o carbono ou a\u00e7o carbono com aditivos<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">\u2014<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">0.05<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">0.06<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"5\">N\u00e3o especificado<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"5\">\u2014<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">4.8<sup>d<\/sup><\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5.6<sup>e<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.13<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.05<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.06<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">5.8<sup>d<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">\u2014<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.05<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.06<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">6.8<sup>d<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.05<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.06<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\" rowspan=\"3\">8.8<sup>f<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">A\u00e7o carbono com aditivos (ex.: B, Mn, Cr) temperado e revenido ou<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.15<sup>e<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">0.003<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">425<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">A\u00e7o carbono temperado e revenido ou<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">A\u00e7o-liga temperado e revenido<sup>g<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.55<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">0.025<\/td>\n<\/tr>\n<p><!-- Additional rows for 9.8, 10.9, 12.9 as per source, abbreviated for brevity --><\/p>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"8\">(A tabela continua com estrutura semelhante para as classes de propriedade 9.8, 10.9 e 12.9. Consulte a norma para obter detalhes completos.)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin-bottom: 20px;\"><sup>um<\/sup> Em caso de lit\u00edgio, aplica-se a an\u00e1lise do produto.<br \/>\n<sup>b<\/sup> Teor de boro at\u00e9 0,005%, boro n\u00e3o efetivo controlado por tit\u00e2nio e\/ou alum\u00ednio.<br \/>\n<sup>c<\/sup> Para parafusos conformados a frio de classe 4.6 e 5.6, pode ser necess\u00e1rio tratamento t\u00e9rmico para conferir plasticidade e resist\u00eancia.<br \/>\n<sup>d<\/sup> A\u00e7o de corte livre permitido com no m\u00e1ximo S 0,34%, P 0,11%, Pb 0,35%.<br \/>\n<sup>e<\/sup> Para a\u00e7o carbono com adi\u00e7\u00e3o de boro &lt;0,25% C, m\u00edn. Mn 0,6% para 8,8, 0,7% para 9,8 e 10,9.<br \/>\n<sup>f<\/sup> Os materiais devem ter temperabilidade suficiente para formar martensita ~90% no n\u00facleo antes do revenido.<br \/>\n<sup>g<\/sup> A\u00e7o-liga com pelo menos um dos seguintes teores: Cr 0,30%, Ni 0,30%, Mo 0,20%, V 0,10%; para m\u00faltiplos, a soma total n\u00e3o deve ser inferior a 70%.<br \/>\n<sup>h<\/sup> Aus\u00eancia de camada de fosfeto branco na superf\u00edcie 12.9; remover antes do tratamento t\u00e9rmico.<br \/>\n<sup>eu<\/sup> Utilize o a\u00e7o 12.9 com cautela, considerando a capacidade do fabricante, as condi\u00e7\u00f5es de servi\u00e7o e os m\u00e9todos de aperto; risco de fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o.<\/p>\n<\/div>\n<div id=\"mechanical-properties\">\n<h2 style=\"color: #0056b3; margin-top: 40px; border-bottom: 1px solid #ddd; padding-bottom: 10px;\">Propriedades Mec\u00e2nicas e F\u00edsicas<\/h2>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Os fixadores das classes de propriedades especificadas devem atender \u00e0s propriedades mec\u00e2nicas e f\u00edsicas das Tabelas 2 a 7 \u00e0 temperatura ambiente.<sup>1<\/sup>O Cap\u00edtulo 8 apresenta m\u00e9todos de teste para verificar a conformidade.<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Nota 1: Mesmo que o material atenda \u00e0s Tabelas 2, alguns tipos de fixadores podem ter capacidade de carga reduzida devido ao tamanho (ver 8.2, 9.4, 9.5).<\/p>\n<p style=\"text-align: justify; margin-bottom: 20px;\">Nota 2: Nem todas as classes se aplicam a todos os fixadores; as normas de produto especificam as classes, que podem fazer refer\u00eancia a fixadores n\u00e3o padronizados.<\/p>\n<h4 style=\"color: #333; margin-top: 20px; text-align: center;\">Tabela 2: Propriedades mec\u00e2nicas e f\u00edsicas de parafusos, porcas e pinos<\/h4>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px; border: 1px solid #ddd; font-size: 12px;\">\n<thead>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"3\">N\u00e3o.<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"3\" rowspan=\"3\">Propriedade mec\u00e2nica ou f\u00edsica<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"10\">Classe de propriedade<\/th>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">4.6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">4.8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">5.6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">5.8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">6.8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"2\">8.8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">9,8 (d \u2264 16 mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">10.9<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" rowspan=\"2\">12.9<\/th>\n<\/tr>\n<tr style=\"background-color: #f8f9fa;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">d \u2264 16 mm<sup>um<\/sup><\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">d &gt; 16 mm<sup>b<\/sup><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\" rowspan=\"2\">1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\" colspan=\"2\" rowspan=\"2\">Resist\u00eancia \u00e0 tra\u00e7\u00e3o R<sub>m<\/sub> \/ MPa<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">nom<sup>c<\/sup><\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">1000<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">1200<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">min<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">420<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">520<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">600<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">800<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">830<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">900<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">1040<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\">1220<\/td>\n<\/tr>\n<p><!-- Additional rows for other properties as per source, abbreviated --><\/p>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: center;\" colspan=\"14\">(A tabela continua com propriedades como limite de escoamento, dureza, etc. Consulte a norma para obter os dados completos.)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"margin-bottom: 20px;\"><sup>um<\/sup> Valores n\u00e3o adequados para parafusos estruturais.<br \/>\n<sup>b<\/sup> Para parafusos estruturais d \u2265 M12.<br \/>\n<sup>c<\/sup> Valores nominais apenas para fins de designa\u00e7\u00e3o (Cap\u00edtulo 5).<br \/>\n<sup>1<\/sup> Teste de energia de impacto a -20\u00b0C (ver 9.14).<\/p>\n<\/div>\n<div id=\"faq\">\n<h2 style=\"color: #0056b3; margin-top: 40px; border-bottom: 1px solid #ddd; padding-bottom: 10px;\">Perguntas frequentes (FAQ)<\/h2>\n<dl style=\"margin-bottom: 20px;\">\n<dt style=\"font-weight: bold; margin-top: 10px;\">1. Qual \u00e9 o significado da marca\u00e7\u00e3o da classe de propriedade, como \"8.8\"?<\/dt>\n<dd style=\"margin-left: 20px;\">Indica resist\u00eancia \u00e0 tra\u00e7\u00e3o nominal (800 MPa) e rela\u00e7\u00e3o de escoamento (0,8), garantindo desempenho padronizado para sele\u00e7\u00e3o em aplica\u00e7\u00f5es de engenharia.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">2. Por que um elemento de fixa\u00e7\u00e3o pode ter capacidade de carga reduzida, mesmo atendendo aos requisitos do material?<\/dt>\n<dd style=\"margin-left: 20px;\">Devido a efeitos de geometria ou tamanho, conforme observado em 8.2 e 9.4; marque como \u201c08.8\u201d para esses casos.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">3. Quais precau\u00e7\u00f5es s\u00e3o necess\u00e1rias para fixadores da classe 12.9?<\/dt>\n<dd style=\"margin-left: 20px;\">Considere a capacidade de fabrica\u00e7\u00e3o, as condi\u00e7\u00f5es de servi\u00e7o e os m\u00e9todos de aperto para evitar fissuras por corros\u00e3o sob tens\u00e3o; n\u00e3o \u00e9 permitida a forma\u00e7\u00e3o de camada de fosfeto branco.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">4. Como as composi\u00e7\u00f5es qu\u00edmicas s\u00e3o verificadas?<\/dt>\n<dd style=\"margin-left: 20px;\">Por meio de an\u00e1lise de fundi\u00e7\u00e3o, com an\u00e1lise de produto em disputas; cumprir as normas nacionais e restri\u00e7\u00f5es regionais em elementos como P e S.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">5. Quais testes confirmam as propriedades mec\u00e2nicas?<\/dt>\n<dd style=\"margin-left: 20px;\">Ensaios de tra\u00e7\u00e3o para R<sub>m<\/sub> e R<sub>eL<\/sub>, testes de dureza (HV, HB, HR), energia de impacto a -20\u00b0C para d \u2265 16 mm e inspe\u00e7\u00f5es de defeitos superficiais de acordo com GB\/T 5779.1 ou 5779.3.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">6. Essas normas s\u00e3o aplic\u00e1veis \u200b\u200ba fixadores com rosca fina?<\/dt>\n<dd style=\"margin-left: 20px;\">Sim, as tabelas 6 e 7 fornecem as cargas m\u00ednimas de tra\u00e7\u00e3o e de prova para roscas finas, calculadas de forma semelhante \u00e0s roscas grossas.<\/dd>\n<\/dl>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A norma GB\/T 3098.1-2010 especifica as propriedades mec\u00e2nicas de parafusos, porcas e pinos de a\u00e7o carbono e a\u00e7o liga. Esta norma define classes de propriedades, materiais e requisitos de desempenho para garantir a confiabilidade em diversas aplica\u00e7\u00f5es. Aplica-se a elementos de fixa\u00e7\u00e3o com di\u00e2metros nominais de rosca de M1,6 a M39, operando em temperaturas entre -50 \u00b0C e +300 \u00b0C, com n\u00facleos [\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-5559","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\/5559","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=5559"}],"version-history":[{"count":1,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5559\/revisions"}],"predecessor-version":[{"id":5560,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5559\/revisions\/5560"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/media?parent=5559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/categories?post=5559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/tags?post=5559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}