{"id":11488,"date":"2025-12-20T12:13:28","date_gmt":"2025-12-20T04:13:28","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11488"},"modified":"2026-04-01T14:59:44","modified_gmt":"2026-04-01T06:59:44","slug":"selection-of-tool-steel-for-thread-rolling-dies","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-thread-rolling-dies\/","title":{"rendered":"Selection of Tool Steel for Thread Rolling Dies(A2, D2, M2 Guide)"},"content":{"rendered":"
\n

Sele\u00e7\u00e3o de a\u00e7o ferramenta para matrizes de lamina\u00e7\u00e3o de roscas<\/h1>\n\n\n\n

Thread rolling forms threads by plastic deformation, which subjects the dies to continuous high contact pressure and repeated loading. The process does not remove material, so stress accumulation at the die surface becomes the dominant factor.<\/p>\n\n\n\n

During operation, dies are exposed to compressive stress, bending, and sliding contact. Friction can generate heat, particularly in cylindrical dies, but this is usually secondary. Under clean working conditions, abrasive wear is limited. Instead, failure is primarily driven by fatigue, which initiates microcracks at the thread crest and progresses into spalling and local breakdown. Once the crest geometry degrades, dimensional accuracy is quickly lost.<\/p>\n\n\n\n

Fatores de sele\u00e7\u00e3o<\/h2>\n\n\n\n

Material selection for thread-rolling dies is governed by how the steel responds to repeated loading in stress-concentration zones rather than by static strength alone.<\/p>\n\n\n\n

High compressive strength is required to prevent plastic deformation under radial pressure. However, the thread crest is highly sensitive to crack initiation. Without sufficient toughness, localized chipping or spalling occurs early in service.<\/p>\n\n\n\n

Fatigue resistance governs service life. Materials that resist crack initiation and slow crack propagation maintain die integrity over longer production cycles.<\/p>\n\n\n\n

The trade-off lies between toughness and wear resistance. For short or unstable runs, higher toughness reduces the risk of premature failure. For long-term, stable production, higher alloy content and carbide volume improve dimensional retention, even at the cost of reduced toughness.<\/p>\n\n\n\n

A\u00e7os para ferramentas recomendados<\/h2>\n\n\n\n

In industrial applications, the following grades are commonly used for flat and circular thread-rolling dies, depending on production conditions and stability requirements.<\/p>\n\n\n\n

\n

A\u00e7o ferramenta AISI A2 | 1.2363 | SKD12<\/h3>\n\n\n\n

A2 provides a balanced combination of toughness and wear resistance, making it suitable for both flat and cylindrical dies. Its higher toughness helps protect the thread crest from chipping under repeated loading.<\/p>\n\n\n\n

It also offers good dimensional stability during heat treatment, which is important for dies requiring post-hardening grinding. In applications where alignment, lubrication, or loading conditions are not fully stable, A2 provides a wider safety margin.<\/p>\n\n\n\n

Its limitation is wear resistance. In long production runs, lower carbide content leads to faster profile degradation than in higher-alloy grades.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de material A2.<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

A\u00e7o ferramenta AISI D2 |1.2379 | SKD11<\/h3>\n\n\n\n

D2 is selected when dimensional stability and wear resistance are the primary requirements. Its high carbon and chromium content produce a large volume of hard carbides, which significantly improve resistance to surface degradation.<\/p>\n\n\n\n

In long-run production, D2 maintains thread profile accuracy and extends die life. This makes it effective in stable processes with consistent loading.<\/p>\n\n\n\n

However, its low toughness makes it more susceptible to chipping. Under conditions involving misalignment, vibration, or impact, crest failure can occur early. D2 should therefore be applied where process stability is well controlled.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de materiais D2<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

A\u00e7o ferramenta AISI M2 | 1.3343 | SKH51<\/h3>\n\n\n\n

M2 is used when maximum die life is required under demanding production conditions. It combines good wear resistance with high hot hardness, allowing it to maintain strength even when friction generates elevated temperatures.<\/p>\n\n\n\n

Compared to cold-work steels, M2 resists softening and maintains edge stability over extended cycles. It is typically hardened to higher levels, which improves wear resistance, while controlled tempering maintains usable toughness.<\/p>\n\n\n\n

This makes M2 suitable for long production runs where both mechanical loading and thermal effects must be considered.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de material M2.<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n

Tabela Resumo<\/h2>\n\n\n\n
A\u00e7o ferramenta de alta qualidade<\/td>Propriedades principais \/ Dureza<\/td>Higher toughness reduces the risk of crest chipping in unstable conditions<\/td><\/tr>
A2<\/td>56\u201358 HRC, balanced toughness and wear resistance<\/td>~64 HRC, high wear resistance, and hot hardness<\/td><\/tr>
D2<\/td>56\u201358 HRC, very high wear resistance, low toughness<\/td>Maintains profile accuracy in stable, long-run production<\/td><\/tr>
M2<\/td>60\u201365 HRC, strong edge stability and thermal resistance<\/td>Maximum die life under combined mechanical and thermal loading<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Selection of Tool Steel for Thread Rolling Dies Thread rolling forms threads by plastic deformation, which subjects the dies to continuous high contact pressure and repeated loading. The process does not remove material, so stress accumulation at the die surface becomes the dominant factor. During operation, dies are exposed to compressive stress, bending, and sliding […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"disabled","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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-11488","page","type-page","status-publish","hentry"],"yoast_head":"\nTool Steel Selection for Thread Rolling Dies (A2, D2, M2 Guide)<\/title>\n<meta name=\"description\" content=\"Learn how to select tool steel for thread rolling dies based on fatigue, toughness, and wear resistance. 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