{"id":5685,"date":"2025-12-24T00:40:41","date_gmt":"2025-12-24T00:40:41","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5685"},"modified":"2025-12-24T00:40:41","modified_gmt":"2025-12-24T00:40:41","slug":"gb-t-3098-15-2014-stainless-steel-nuts-mechanical-properties","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/pt\/blog\/gb-t-3098-15-2014-stainless-steel-nuts-mechanical-properties\/","title":{"rendered":"Propriedades mec\u00e2nicas das porcas de a\u00e7o inoxid\u00e1vel GB\/T 3098.15-2014"},"content":{"rendered":"<h2>Introdu\u00e7\u00e3o \u00e0 norma GB\/T 3098.15-2014<\/h2>\n<div>\n<p dir=\"auto\">A norma GB\/T 3098.15-2014 especifica as propriedades mec\u00e2nicas de porcas de a\u00e7o inoxid\u00e1vel utilizadas em fixadores. Esta norma garante confiabilidade em diversas aplica\u00e7\u00f5es industriais, definindo requisitos para marca\u00e7\u00e3o, composi\u00e7\u00e3o qu\u00edmica, desempenho mec\u00e2nico e ensaios. Ela se aplica a porcas fabricadas em a\u00e7os inoxid\u00e1veis \u200b\u200bausten\u00edticos, martens\u00edticos e ferr\u00edticos, abrangendo classes de desempenho adequadas para diferentes capacidades de carga e condi\u00e7\u00f5es ambientais. A conformidade com esta norma garante que as porcas atendam a crit\u00e9rios rigorosos de resist\u00eancia, resist\u00eancia \u00e0 corros\u00e3o e durabilidade, tornando-a essencial para engenheiros em projetos mec\u00e2nicos e fabrica\u00e7\u00e3o.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Marca\u00e7\u00e3o, identifica\u00e7\u00e3o e acabamento de superf\u00edcie<\/h2>\n<p dir=\"auto\">O sistema de marca\u00e7\u00e3o para porcas de a\u00e7o inoxid\u00e1vel inclui o grupo do a\u00e7o e a classe de desempenho, separados por um h\u00edfen. A primeira parte indica o grupo do a\u00e7o (A para austen\u00edtico, C para martens\u00edtico, F para ferr\u00edtico), seguida por um n\u00famero que denota a faixa de composi\u00e7\u00e3o qu\u00edmica. A segunda parte representa a classe de desempenho, expressa como 1\/10 da tens\u00e3o de prova em MPa para porcas com altura m \u2265 0,8D, ou com um zero \u00e0 esquerda para porcas mais finas (0,5D \u2264 m &lt; 0,8D).<\/p>\n<ul dir=\"auto\">\n<li>Exemplo: A2-70 \u2013 A\u00e7o austen\u00edtico, trabalhado a frio, tens\u00e3o de prova m\u00ednima de 700 MPa (para porcas m \u2265 0,8D).<\/li>\n<li>Exemplo: C4-70 \u2013 A\u00e7o martens\u00edtico, temperado e revenido, tens\u00e3o de prova m\u00ednima de 700 MPa.<\/li>\n<li>Exemplo: A2-035 \u2013 A\u00e7o austen\u00edtico, trabalhado a frio, tens\u00e3o de prova m\u00ednima de 350 MPa (para porcas mais finas).<\/li>\n<\/ul>\n<p dir=\"auto\">Os a\u00e7os austen\u00edticos de baixo carbono (C \u2264 0,03%) podem adicionar \u201cL\u201d (ex.: A4L-80). As superf\u00edcies passivadas conforme GB\/T 5267.4 adicionam \u201cP\u201d (ex.: A4-80P). As porcas com di\u00e2metro nominal D \u2265 5 mm devem ser marcadas claramente em uma das faces de apoio ou em um dos lados. A identifica\u00e7\u00e3o do fabricante \u00e9 obrigat\u00f3ria sempre que poss\u00edvel. A embalagem deve incluir as marcas do fabricante, o grupo do a\u00e7o, a classe de desempenho e o n\u00famero do lote, conforme GB\/T 90.3. Salvo especifica\u00e7\u00e3o em contr\u00e1rio, as porcas s\u00e3o limpas e polidas; a passiva\u00e7\u00e3o \u00e9 recomendada para maior resist\u00eancia \u00e0 corros\u00e3o.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Composi\u00e7\u00e3o Qu\u00edmica<\/h2>\n<p dir=\"auto\">A composi\u00e7\u00e3o qu\u00edmica dos a\u00e7os inoxid\u00e1veis \u200b\u200bpara porcas est\u00e1 detalhada na Tabela 1, em conformidade com a norma GB\/T 3098.6-2014. Os fabricantes selecionam as composi\u00e7\u00f5es dentro dos grupos, salvo acordo em contr\u00e1rio. Para riscos de corros\u00e3o intergranular, recomenda-se o uso de a\u00e7os A3\/A5 estabilizados ou a\u00e7os A2\/A4 de baixo carbono (C \u2264 0,03%).<\/p>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table dir=\"auto\" style=\"width: 100%; height: 253px;\">\n<thead>\n<tr style=\"height: 23px;\">\n<th style=\"height: 46px;\" rowspan=\"2\" data-col-size=\"md\">Categoria<\/th>\n<th style=\"height: 46px;\" rowspan=\"2\" data-col-size=\"lg\">Grupo<\/th>\n<th style=\"height: 23px;\" colspan=\"11\" data-col-size=\"xs\">Composi\u00e7\u00e3o qu\u00edmica (fra\u00e7\u00e3o m\u00e1ssica)\/%<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\">Notas<\/th>\n<\/tr>\n<tr style=\"height: 23px;\">\n<th style=\"height: 23px;\" data-col-size=\"md\">C<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">Si<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\">Mn<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\">P<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">S<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">N<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\">Cr<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">Mo<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">Ni<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">Cu<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\">Outros<\/th>\n<th style=\"height: 23px;\" data-col-size=\"xs\"><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"height: 23px;\">\n<td style=\"height: 115px;\" rowspan=\"5\" data-col-size=\"md\">Austen\u00edtico<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">A1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.12<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">6.5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.15~0.35<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">16~19<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.7<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">5~10<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1.75~2.25<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">b, c, d<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">A2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.05<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">15~20<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014 e<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">8~19<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">4<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">f,g<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">A3<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.08<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.045<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">17~19<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014 e<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">9~12<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">h<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">A4<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.08<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.045<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">16~18.5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">2~3<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">10~15<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">4<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">g,i<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">A5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.08<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">2<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.045<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">16~18.5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">2~3<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">10.5~14<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">oi<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 69px;\" rowspan=\"3\" data-col-size=\"md\">Martens\u00edtico<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">C1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.09~0.15<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.05<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">11.5~14<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">eu<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">C3<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.17~0.25<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.04<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">16~18<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">1.5~2.5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">C4<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.08~0.15<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1.5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.06<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.15~0.35<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">12~14<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.6<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">bi<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"md\">Ferr\u00edtico<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">F1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.12<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">0.04<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">0.03<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">15~18<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014 j<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"xs\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">k,l<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\">Notas: a Valores m\u00e1ximos, salvo indica\u00e7\u00e3o em contr\u00e1rio. b O enxofre pode ser substitu\u00eddo por sel\u00eanio. c Se Ni  8%, sem limite m\u00ednimo de Cu. e Mo opcional pelo fabricante. f Se Cr &lt; 17%, m\u00edn. Ni = 12%. g Para C m\u00e1x. = 0,03%, N m\u00e1x. = 0,22%. h Ti \u2265 5 \u00d7 C% a 0,8%, ou Nb\/Ta \u2265 10 \u00d7 C% a 1,0%. i Para di\u00e2metros maiores, C mais elevado at\u00e9 0,12% para austen\u00edtico. j Mo opcional. k Ti \u2265 5 \u00d7 C% a 0,8%. l Nb\/Ta \u226510\u00d7C% a 1,0%.<\/p>\n<p dir=\"auto\">Essa composi\u00e7\u00e3o garante \u00f3tima resist\u00eancia \u00e0 corros\u00e3o e resist\u00eancia mec\u00e2nica, com anexos que fornecem exemplos de normas ISO para aplica\u00e7\u00f5es especializadas.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Propriedades Mec\u00e2nicas<\/h2>\n<p dir=\"auto\">As propriedades mec\u00e2nicas devem atender \u00e0s Tabelas 2 e 3 para aceita\u00e7\u00e3o, incluindo dureza (para C1, C3 e C4 temperados\/revenidos) e testes de carga de prova. Nem todas as classes se aplicam a todas as porcas; consulte as normas do produto.<\/p>\n<h3 dir=\"auto\">Tabela 2: Propriedades Mec\u00e2nicas \u2013 Grupos de A\u00e7os Austen\u00edticos<\/h3>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table dir=\"auto\" style=\"width: 100%; height: 162px;\">\n<thead>\n<tr style=\"height: 23px;\">\n<th style=\"height: 116px;\" rowspan=\"4\" data-col-size=\"lg\">Categoria<\/th>\n<th style=\"height: 116px;\" rowspan=\"4\" data-col-size=\"lg\">Grupo<\/th>\n<th style=\"height: 46px;\" colspan=\"2\" rowspan=\"2\" data-col-size=\"sm\">Grau de desempenho<\/th>\n<th style=\"height: 23px;\" colspan=\"2\" data-col-size=\"sm\">Tens\u00e3o de prova SP\/MPa m\u00edn.<\/th>\n<\/tr>\n<tr style=\"height: 23px;\">\n<th style=\"height: 23px;\" colspan=\"2\" data-col-size=\"lg\"><\/th>\n<\/tr>\n<tr style=\"height: 47px;\">\n<th style=\"height: 47px;\" data-col-size=\"lg\">Nozes m\u22650,8D<\/th>\n<th style=\"height: 47px;\" data-col-size=\"lg\">Nozes 0,5D\u2264m&lt;0,8D<\/th>\n<th style=\"height: 47px;\" data-col-size=\"sm\">Nozes m\u22650,8D<\/th>\n<th style=\"height: 47px;\" data-col-size=\"sm\">Nozes 0,5D\u2264m&lt;0,8D<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"height: 23px;\">\n<td style=\"height: 69px;\" rowspan=\"3\" data-col-size=\"lg\">Austen\u00edtico<\/td>\n<td style=\"height: 69px;\" rowspan=\"3\" data-col-size=\"lg\">A1, A2, A3, A4, A5<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">50<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">025<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">500<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">250<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"lg\">70<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">035<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">700<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">350<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"lg\">80<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">040<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">800<\/td>\n<td style=\"height: 23px;\" data-col-size=\"sm\">400<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 dir=\"auto\">Tabela 3: Propriedades Mec\u00e2nicas \u2013 Grupos de A\u00e7os Martens\u00edticos e Ferr\u00edticos<\/h3>\n<div>\n<div>\n<div>\n<div><\/div>\n<\/div>\n<div dir=\"auto\">\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table dir=\"auto\" style=\"width: 100%; height: 253px;\">\n<thead>\n<tr style=\"height: 23px;\">\n<th style=\"height: 92px;\" rowspan=\"4\" data-col-size=\"sm\">Categoria<\/th>\n<th style=\"height: 92px;\" rowspan=\"4\" data-col-size=\"md\">Grupo<\/th>\n<th style=\"height: 46px;\" colspan=\"2\" rowspan=\"2\" data-col-size=\"md\">Grau de desempenho<\/th>\n<th style=\"height: 23px;\" colspan=\"2\" data-col-size=\"md\">Tens\u00e3o de prova SP\/MPa m\u00edn.<\/th>\n<th style=\"height: 46px;\" colspan=\"3\" rowspan=\"2\" data-col-size=\"md\">Dureza<\/th>\n<\/tr>\n<tr style=\"height: 23px;\">\n<th style=\"height: 23px;\" colspan=\"2\" data-col-size=\"sm\"><\/th>\n<\/tr>\n<tr style=\"height: 23px;\">\n<th style=\"height: 23px;\" data-col-size=\"sm\">Nozes m\u22650,8D<\/th>\n<th style=\"height: 23px;\" data-col-size=\"md\">Nozes 0,5D\u2264m&lt;0,8D<\/th>\n<th style=\"height: 23px;\" data-col-size=\"md\">Nozes m\u22650,8D<\/th>\n<th style=\"height: 23px;\" data-col-size=\"md\">Nozes 0,5D\u2264m&lt;0,8D<\/th>\n<th style=\"height: 23px;\" data-col-size=\"md\">HB<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">HRC<\/th>\n<th style=\"height: 23px;\" data-col-size=\"lg\">HV<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"height: 23px;\">\n<td style=\"height: 138px;\" rowspan=\"6\" data-col-size=\"sm\">Martens\u00edtico<\/td>\n<td style=\"height: 69px;\" rowspan=\"3\" data-col-size=\"md\">C1<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">50<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">025<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">500<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">250<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">147~209<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">155~220<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"sm\">70<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">700<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">209~314<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">20~34<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">220~330<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"sm\">110 a<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">055 a<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">1100<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">550<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">36~45<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">350~440<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"sm\">C3<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">80<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">040<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">800<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">400<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">228~323<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">21~35<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">240~340<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 46px;\" rowspan=\"2\" data-col-size=\"sm\">C4<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">50<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">500<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">147~209<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">155~220<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"sm\">70<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">035<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">700<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">350<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">209~314<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">20~34<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">220~330<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 46px;\" rowspan=\"2\" data-col-size=\"sm\">Ferr\u00edtico<\/td>\n<td style=\"height: 46px;\" rowspan=\"2\" data-col-size=\"md\">F1 b<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">45<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">020<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">450<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">200<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">128~209<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">135~220<\/td>\n<\/tr>\n<tr style=\"height: 23px;\">\n<td style=\"height: 23px;\" data-col-size=\"sm\">60<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">030<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">600<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">300<\/td>\n<td style=\"height: 23px;\" data-col-size=\"md\">171~271<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">\u2014<\/td>\n<td style=\"height: 23px;\" data-col-size=\"lg\">180~285<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p dir=\"auto\">a Temperado e revenido, revenido m\u00ednimo 275\u00b0C, D\u226424 mm. b Amolecido.<\/p>\n<p dir=\"auto\">Essas propriedades orientam a sele\u00e7\u00e3o para aplica\u00e7\u00f5es que exigem n\u00edveis espec\u00edficos de resist\u00eancia, levando em considera\u00e7\u00e3o o tratamento t\u00e9rmico e as dimens\u00f5es da porca.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">M\u00e9todos de teste<\/h2>\n<p dir=\"auto\">Os ensaios de dureza para a\u00e7os martens\u00edticos e ferr\u00edticos seguem as normas GB\/T 231.1 (HB), GB\/T 230.1 (HRC) ou GB\/T 4340.1 (HV), com Vickers como refer\u00eancia. Os procedimentos est\u00e3o alinhados com a norma GB\/T 3098.2; os valores devem estar dentro dos intervalos da Tabela 3. Os ensaios de carga de prova, conforme a norma GB\/T 3098.2, garantem a capacidade de suportar carga sem falhas.<\/p>\n<ol dir=\"auto\">\n<li>Realize o teste de dureza em superf\u00edcies preparadas.<\/li>\n<li>Aplique a carga de teste gradualmente e mantenha-a para verificar a integridade.<\/li>\n<li>Utilize equipamentos calibrados para garantir a precis\u00e3o.<\/li>\n<\/ol>\n<p dir=\"auto\">Esses m\u00e9todos fornecem uma verifica\u00e7\u00e3o confi\u00e1vel do desempenho das porcas em montagens reais.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Ap\u00eandices: Detalhes t\u00e9cnicos adicionais<\/h2>\n<p dir=\"auto\">Os ap\u00eandices oferecem informa\u00e7\u00f5es detalhadas:<\/p>\n<ul dir=\"auto\">\n<li>Ap\u00eandice B: Composi\u00e7\u00e3o do a\u00e7o inoxid\u00e1vel de acordo com a norma ISO 683-13, com exemplos para os tipos ferr\u00edtico, martens\u00edtico e austen\u00edtico.<\/li>\n<li>Ap\u00eandice D: Materiais que reduzem a fissura\u00e7\u00e3o por corros\u00e3o sob tens\u00e3o induzida por cloretos, por exemplo, X2CrNiMoN17-13-5 com composi\u00e7\u00f5es espec\u00edficas para ambientes de alto risco, como piscinas.<\/li>\n<li>Ap\u00eandice E: Rela\u00e7\u00f5es de resist\u00eancia ao escoamento em altas temperaturas (ex.: A2\/A4 a 400\u00b0C: 70%) e aplicabilidade em baixas temperaturas (A2\/A3 at\u00e9 -200\u00b0C).<\/li>\n<li>Ap\u00eandice G: Permeabilidade magn\u00e9tica relativa (ex.: A2 \u2248 1,8, n\u00e3o magn\u00e9tica no estado recozido em solu\u00e7\u00e3o, mas pode se tornar magn\u00e9tica ap\u00f3s trabalho a frio).<\/li>\n<\/ul>\n<p dir=\"auto\">Consulte essas informa\u00e7\u00f5es para aplica\u00e7\u00f5es especializadas, garantindo que a sele\u00e7\u00e3o de materiais minimize riscos como corros\u00e3o ou interfer\u00eancia magn\u00e9tica.<\/p>\n<\/div>\n<div>\n<h2 dir=\"auto\">Perguntas frequentes<\/h2>\n<dl>\n<dt>Qual a diferen\u00e7a entre porcas de a\u00e7o inoxid\u00e1vel A2 e A4?<\/dt>\n<dd>O a\u00e7o A2 \u00e9 um a\u00e7o austen\u00edtico de uso geral com boa resist\u00eancia \u00e0 corros\u00e3o, enquanto o a\u00e7o A4 inclui molibd\u00eanio para maior resist\u00eancia em ambientes com cloretos, conforme a composi\u00e7\u00e3o da Tabela 1.<\/dd>\n<dd><\/dd>\n<dd><\/dd>\n<dt>Como fa\u00e7o para selecionar o n\u00edvel de desempenho adequado para uma porca?<\/dt>\n<dd>A escolha deve ser baseada nos requisitos de tens\u00e3o de prova e na altura da porca; por exemplo, grau 70 para porcas de 700 MPa em m \u2265 0,8D, considerando as cargas de aplica\u00e7\u00e3o e as Tabelas 2\/3.<\/dd>\n<dd><\/dd>\n<dd><\/dd>\n<dt>Quais s\u00e3o os testes necess\u00e1rios para a aceita\u00e7\u00e3o de porcas de a\u00e7o inoxid\u00e1vel?<\/dt>\n<dd>Dureza para os grupos martens\u00edticos\/ferr\u00edticos e carga de prova para todos, conforme os m\u00e9todos da se\u00e7\u00e3o 3, garantindo a conformidade com as propriedades mec\u00e2nicas especificadas.<\/dd>\n<dd><\/dd>\n<dd><\/dd>\n<dt>Essas porcas podem ser usadas em aplica\u00e7\u00f5es de alta temperatura?<\/dt>\n<dd>Sim, mas consulte o Ap\u00eandice E para obter informa\u00e7\u00f5es sobre a redu\u00e7\u00e3o da resist\u00eancia ao escoamento em temperaturas elevadas; por exemplo, o A2 mant\u00e9m o valor 70% a 400 \u00b0C sob cargas n\u00e3o c\u00edclicas.<\/dd>\n<dd><\/dd>\n<dd><\/dd>\n<dt>Como mitigar a corros\u00e3o intergranular em porcas austen\u00edticas?<\/dt>\n<dd>Utilize variantes de baixo teor de carbono (por exemplo, A4L) ou A3\/A5 estabilizado, testado de acordo com a norma GB\/T 4334, conforme recomendado na se\u00e7\u00e3o de composi\u00e7\u00e3o qu\u00edmica.<\/dd>\n<dd><\/dd>\n<dd><\/dd>\n<dt>Que tipo de marca\u00e7\u00e3o \u00e9 necess\u00e1ria na embalagem?<\/dt>\n<dd>Inclua o identificador do fabricante, o grupo de a\u00e7o\/grau de desempenho conforme a Figura 1 e o n\u00famero do lote conforme GB\/T 90.3 para rastreabilidade.<\/dd>\n<\/dl>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introdu\u00e7\u00e3o \u00e0 norma GB\/T 3098.15-2014 A norma GB\/T 3098.15-2014 especifica as propriedades mec\u00e2nicas de porcas de a\u00e7o inoxid\u00e1vel utilizadas em fixadores. Esta norma garante a confiabilidade em diversas aplica\u00e7\u00f5es industriais, definindo requisitos para marca\u00e7\u00e3o, composi\u00e7\u00e3o qu\u00edmica, desempenho mec\u00e2nico e ensaios. Ela se aplica a porcas fabricadas em a\u00e7os inoxid\u00e1veis \u200b\u200bausten\u00edticos, martens\u00edticos e ferr\u00edticos, abrangendo classes de desempenho adequadas para [\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-5685","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\/5685","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=5685"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5685\/revisions"}],"predecessor-version":[{"id":5687,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/posts\/5685\/revisions\/5687"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/media?parent=5685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/categories?post=5685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/pt\/wp-json\/wp\/v2\/tags?post=5685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}