{"id":19493,"date":"2026-09-22T00:41:20","date_gmt":"2026-09-21T16:41:20","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19493"},"modified":"2026-10-15T23:48:59","modified_gmt":"2026-10-15T15:48:59","slug":"microalloyed-strip-steel-compositions","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/microalloyed-strip-steel-compositions\/","title":{"rendered":"Composi\u00e7\u00f5es e limite de escoamento de a\u00e7os de tira microligados"},"content":{"rendered":"

Composi\u00e7\u00f5es e limite de escoamento de a\u00e7os de tira microligados<\/h1>\n\n\n\n

Composi\u00e7\u00f5es em percentual em peso, condi\u00e7\u00f5es industriais de lamina\u00e7\u00e3o e limite de escoamento ap\u00f3s bobinamento para cinco a\u00e7os microligados comerciais para tiras a quente, desde uma base C-Mn com baixo ni\u00f3bio at\u00e9 graus NbTiV que atingem 599 a 638 MPa. As tabelas s\u00e3o um resumo de refer\u00eancia de um cap\u00edtulo publicado e n\u00e3o uma especifica\u00e7\u00e3o da Aobo Steel. A \u00faltima tabela divide o limite de escoamento medido na parte explicada pelo tamanho de gr\u00e3o e solu\u00e7\u00e3o s\u00f3lida e na parte contribu\u00edda por discord\u00e2ncias e precipita\u00e7\u00e3o de carbonitretos<\/a>.<\/p>\n\n\n\n

Composi\u00e7\u00f5es dos cinco a\u00e7os<\/p>\n\n\n\n

Todos os valores s\u00e3o em porcentagem de peso, conforme impresso. Um tra\u00e7o significa que a fonte n\u00e3o lista adi\u00e7\u00e3o desse elemento, e n.d. significa n\u00e3o determinado. A \u00faltima coluna \u00e9 a fra\u00e7\u00e3o volum\u00e9trica total m\u00e1xima dispon\u00edvel para precipita\u00e7\u00e3o de carbonitreto.<\/p>\n\n\n\n

A\u00e7o<\/th>C<\/th>Mn<\/th>Si<\/th>P<\/th>S<\/th>Al<\/th>Nb<\/th>Ti<\/th>V<\/th>N<\/th>Vf
m\u00e1ximo<\/th><\/tr><\/thead>
Nb<\/td>0.07<\/td>0.68<\/td>0.01<\/td>0.012<\/td>0.009<\/td>0.04<\/td>0.04<\/td>\u2013<\/td>\u2013<\/td>0.009<\/td>0.00045<\/td><\/tr>
NbTi-1<\/td>0.05<\/td>0.55<\/td>0.02<\/td>n.d.<\/td>n.d.<\/td>0.02<\/td>0.02<\/td>0.06<\/td>\u2013<\/td>0.006<\/td>0.00131<\/td><\/tr>
NbTi-2<\/td>0.12<\/td>1.21<\/td>0.33<\/td>0.023<\/td>0.008<\/td>0.048<\/td>0.057<\/td>0.059<\/td>\u2013<\/td>0.008<\/td>0.00166<\/td><\/tr>
NbTi-3<\/td>0.11<\/td>1.54<\/td>0.28<\/td>0.026<\/td>0.007<\/td>0.01<\/td>0.04<\/td>0.11<\/td>\u2013<\/td>n.d.<\/td>0.00261<\/td><\/tr>
NbTiV<\/td>0.14<\/td>1.38<\/td>0.25<\/td>0.018<\/td>0.007<\/td>0.07<\/td>0.04<\/td>0.04<\/td>0.03<\/td>0.008<\/td>0.00174<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, Alloy Steel, Properties and Use (E. Morales), cap\u00edtulo 3, Comments About the Strengthening Mechanisms in Commercial Microalloyed Steels and Reaction Kinetics on Tempering in Low-Alloy Steels, Tabela 5, p. 60.<\/p>\n\n\n\n

\n

Composi\u00e7\u00f5es e limite de escoamento de a\u00e7os de tira microligados, PDF para impress\u00e3o<\/strong><\/p>\n\n

Duas p\u00e1ginas A4 com as cinco composi\u00e7\u00f5es de a\u00e7o em porcentagem de peso, as condi\u00e7\u00f5es de lamina\u00e7\u00e3o e o limite de escoamento ap\u00f3s bobinamento, e nossos dados de contato.<\/p>\n\n

\n
Baixar PDF, 430 KB<\/a><\/div>\n\n<\/div>\n<\/div>\n\n\n\n

Condi\u00e7\u00f5es industriais de processamento e limite de escoamento ap\u00f3s bobinamento<\/p>\n\n\n\n

As temperaturas de aquecimento, desbaste, acabamento e bobinamento s\u00e3o dadas em graus C, a espessura em mil\u00edmetros e o limite de escoamento em MPa. Todos os cinco a\u00e7os foram laminados em um laminador de tiras a quente industrial. A coluna de resfriamento est\u00e1 impressa como \u00b0C*min-1 na fonte e \u00e9 reproduzida sem altera\u00e7\u00e3o.<\/p>\n\n\n\n

A\u00e7o<\/th>Encharcando
\u00b0C<\/th>		Bruto
\u00b0C<\/th>		Acabamento
\u00b0C<\/th>		Resfriamento
\u00b0C*min-1<\/th>		Bobinamento
\u00b0C<\/th>		Grossura
mm<\/th>		L.E.
MPa<\/th><\/tr><\/thead>
Nb<\/td>1150<\/td>\u22651080<\/td>890<\/td>10<\/td>650<\/td>10<\/td>310<\/td><\/tr>
NbTi-1<\/td>1230<\/td>\u22651100<\/td>870<\/td>20<\/td>630<\/td>8<\/td>332<\/td><\/tr>
NbTi-2<\/td>1150<\/td>\u22651070<\/td>870<\/td>10<\/td>650<\/td>7<\/td>534<\/td><\/tr>
NbTi-3<\/td>1225<\/td>\u22651100<\/td>895<\/td>10<\/td>650<\/td>8<\/td>638<\/td><\/tr>
NbTiV<\/td>1225<\/td>\u22651100<\/td>895<\/td>10<\/td>670<\/td>3<\/td>599<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, Alloy Steel, Properties and Use (E. Morales), cap\u00edtulo 3, Comments About the Strengthening Mechanisms in Commercial Microalloyed Steels and Reaction Kinetics on Tempering in Low-Alloy Steels, Tabela 6, p. 60.<\/p>\n\n\n\n

De onde vem o limite de escoamento<\/p>\n\n\n\n

O limite de escoamento base \u00e9 calculado a partir do tamanho de gr\u00e3o ferr\u00edtico, mangan\u00eas, sil\u00edcio e nitrog\u00eanio livre em solu\u00e7\u00e3o. A \u00faltima coluna \u00e9 o endurecimento adicional por discord\u00e2ncias e precipita\u00e7\u00e3o, obtido subtraindo o valor base calculado do limite de escoamento medido. A fonte imprime o cabe\u00e7alho da \u00faltima coluna como \u0394\u03c3( MPa, reproduzido aqui como \u0394\u03c3 (MPa).<\/p>\n\n\n\n

A\u00e7o<\/th>Tamanho do gr\u00e3o
(\u00b5m)<\/th>		\u03c3
(MPa)<\/th>		\u0394\u03c3
(MPa)<\/th><\/tr><\/thead>
Nb<\/td>10.0<\/td>252<\/td>58<\/td><\/tr>
NbTi-1<\/td>9.4<\/td>254<\/td>78<\/td><\/tr>
NbTi-2<\/td>5.0<\/td>367<\/td>167<\/td><\/tr>
NbTi-3<\/td>4.2<\/td>393<\/td>245<\/td><\/tr>
NbTiV<\/td>3.3<\/td>421<\/td>178<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, Alloy Steel, Properties and Use (E. Morales), cap\u00edtulo 3, Comments About the Strengthening Mechanisms in Commercial Microalloyed Steels and Reaction Kinetics on Tempering in Low-Alloy Steels, Tabela 7, p. 61.<\/p>\n\n\n\n

Carbono e mangan\u00eas definem o n\u00edvel de resist\u00eancia. O a\u00e7o Nb com 0,07 % C e 0,68 % Mn atingiu 310 MPa ap\u00f3s bobinamento, enquanto o NbTi-2 com 0,12 % C e 1,21 % Mn atingiu 534 MPa. Os tr\u00eas a\u00e7os de maior resist\u00eancia cont\u00eam ni\u00f3bio com tit\u00e2nio, e o NbTiV adiciona tamb\u00e9m van\u00e1dio. Para as composi\u00e7\u00f5es dos graus de a\u00e7o liga que fornecemos como barra, consulte o Tabela de composi\u00e7\u00e3o de a\u00e7o liga<\/a>.<\/p>\n\n\n\n

Os tr\u00eas a\u00e7os de maior resist\u00eancia tamb\u00e9m sa\u00edram do laminador mais finos, com 3 a 8 mm contra 10 mm dos dois de menor resist\u00eancia, e seu tamanho de gr\u00e3o ferr\u00edtico caiu para 3,3 a 5,0 \u00b5m contra cerca de 10 \u00b5m. O refino de gr\u00e3o \u00e9 a maior parte desse ganho. O endurecimento adicional por discord\u00e2ncias e precipita\u00e7\u00e3o varia de 58 MPa no a\u00e7o Nb a 245 MPa no NbTi-3.<\/p>\n\n\n\n

Os nomes dos a\u00e7os Nb, NbTi-1, NbTi-2, NbTi-3 e NbTiV s\u00e3o os identificadores usados no cap\u00edtulo da fonte, n\u00e3o designa\u00e7\u00f5es comerciais de grau. Os n\u00fameros acima s\u00e3o os valores impressos nesse cap\u00edtulo, n\u00e3o uma especifica\u00e7\u00e3o de compra. A composi\u00e7\u00e3o dos graus de a\u00e7o carbono que fornecemos est\u00e1 no Tabela de composi\u00e7\u00e3o do a\u00e7o carbono<\/a>.<\/p>\n\n\n\n

Os dados de composi\u00e7\u00e3o e propriedades s\u00e3o apenas para refer\u00eancia geral. Os valores reais variam conforme a norma, o laminador e o n\u00famero de corrida. Confirme com o certificado de ensaio do material (MTC) ou entre em contato com a Aobo Steel.<\/p>\n\n\n\n

Dados de refer\u00eancia compilados de Alloy Steel, Properties and Use (E. Morales), cap\u00edtulo 3, Comments About the Strengthening Mechanisms in Commercial Microalloyed Steels and Reaction Kinetics on Tempering in Low-Alloy Steels.<\/p>","protected":false},"excerpt":{"rendered":"

Microalloyed Strip Steel Compositions and Yield Strength Compositions in weight percent, industrial rolling conditions and yield strength after coiling for five commercial microalloyed hot strip steels, from a low niobium C-Mn baseline to NbTiV grades that reach 599 to 638 MPa. The tables are a reference summary of a published chapter and not an Aobo […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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Strip Steel Compositions and Yield Strength Compositions in weight percent, industrial rolling conditions and yield strength after coiling for five commercial microalloyed hot strip steels, from a low niobium C-Mn baseline to NbTiV grades that reach 599 to 638 MPa. The tables are a reference summary of a published chapter and not an Aobo…","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Microalloyed Strip Steel Compositions and Yield Strength Compositions in weight percent, industrial rolling conditions and yield strength after coiling for five commercial microalloyed hot strip steels, from a low niobium C-Mn baseline to NbTiV grades that reach 599 to 638 MPa. 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