{"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>GB\/T 3098.1-2010 specifies the mechanical properties of bolts, screws, and studs made of carbon steel and alloy steel. This standard defines property classes, materials, and performance requirements to ensure reliability in various applications. It applies to fasteners with nominal thread diameters from M1.6 to M39, operating at temperatures between -50\u00b0C and +300\u00b0C, with core provisions [&hellip;]<\/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}]}}