{"id":19653,"date":"2026-09-24T00:16:39","date_gmt":"2026-09-23T16:16:39","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19653"},"modified":"2026-11-13T18:30:19","modified_gmt":"2026-11-13T10:30:19","slug":"tool-steel-soak-time-chart","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/tool-steel-soak-time-chart\/","title":{"rendered":"Tabela de Tempo de Perman\u00eancia para A\u00e7o Ferramenta"},"content":{"rendered":"

Tabela de Tempo de Perman\u00eancia para A\u00e7o Ferramenta<\/h1>\n\n\n\n

O tempo de perman\u00eancia \u00e9 o tempo durante o qual o a\u00e7o \u00e9 mantido na temperatura de austenitiza\u00e7\u00e3o, definido por dois fatores: a classe do a\u00e7o e a menor se\u00e7\u00e3o transversal da pe\u00e7a. As tabelas desta p\u00e1gina apresentam esse tempo de perman\u00eancia para as classes usadas em trabalho de moldes, ferramentas e matrizes, extra\u00eddos das se\u00e7\u00f5es de perman\u00eancia impressas para cada classe na fonte. As taxas variam de 5 minutos por polegada para as classes de t\u00eampera em \u00f3leo e em \u00e1gua at\u00e9 uma hora inteira por polegada para as classes de trabalho a frio de alta liga. Este \u00e9 um resumo de refer\u00eancia da pr\u00e1tica publicada e n\u00e3o uma especifica\u00e7\u00e3o da Aobo Steel.<\/p>\n\n\n\n

O que define o tempo de manuten\u00e7\u00e3o<\/h2>\n\n\n\n

A classe define a taxa porque o teor de liga determina quanto tempo os carbonetos levam para se dissolver na temperatura de austenitiza\u00e7\u00e3o. \u00c9 por isso que o H13 \u00e9 mantido por 30 minutos por polegada, enquanto o D2, o A2, o A6 e o S7 s\u00e3o mantidos por uma hora inteira por polegada, e por que as classes de t\u00eampera em \u00f3leo e em \u00e1gua s\u00e3o mantidas por 5 minutos por polegada.<\/p>\n\n\n\n

A se\u00e7\u00e3o define o total. A fonte \u00e9 expl\u00edcita que a taxa se aplica \u00e0 menor se\u00e7\u00e3o transversal e n\u00e3o \u00e0 maior. Uma chapa de 1 in de espessura por 12 in por 12 in permanece por 1 hora, porque sua menor se\u00e7\u00e3o transversal \u00e9 1 in. Uma barra de 3 in com um furo de 1 in atravessando-a tamb\u00e9m permanece por 1 hora porque seu ponto mais fino \u00e9 1 in. Um cubo de 3 in permanece por 3 horas.<\/p>\n\n\n\n

A contagem do tempo come\u00e7a quando a pe\u00e7a atinge a temperatura do forno, n\u00e3o quando o forno atinge o ponto de ajuste. A fonte verifica isso olhando pela porta e comparando a cor da pe\u00e7a com a do forno, levando em conta a folha de a\u00e7o inoxid\u00e1vel, que pode parecer escura nas bordas onde n\u00e3o toca a pe\u00e7a.<\/p>\n\n\n\n

Tempo de perman\u00eancia para se\u00e7\u00f5es at\u00e9 1 pol<\/h2>\n\n\n\n

Cada cap\u00edtulo de grau fornece a taxa por polegada e depois adiciona uma tabela de regra pr\u00e1tica para pe\u00e7as menores que 1 pol, porque a taxa superestima a manuten\u00e7\u00e3o em trabalho fino. D2, A2, A6, H13 e S7 t\u00eam cada um sua pr\u00f3pria tabela, e as cinco s\u00e3o impressas lado a lado abaixo.<\/p>\n\n\n\n

Tempo de perman\u00eancia por regra pr\u00e1tica para se\u00e7\u00f5es at\u00e9 1 pol<\/h3>\n\n\n\n
Tamanho da se\u00e7\u00e3o<\/th>D2<\/th>A2<\/th>A6<\/th>H13<\/th>S7<\/th><\/tr><\/thead>
1\/8 pol (3,175 mm)<\/td>30 minutos<\/td>30 minutos<\/td>10-15 minutos<\/td>10-15 minutos<\/td>30 minutos<\/td><\/tr>
1\/4 pol (6,350 mm)<\/td>40 minutos<\/td>40 minutos<\/td>15 minutos<\/td>15 minutos<\/td>40 minutos<\/td><\/tr>
1\/2 pol (12,70 mm)<\/td>50 minutos<\/td>50 minutos<\/td>30 minutos<\/td>20 minutos<\/td>45-50 minutos<\/td><\/tr>
3\/4 pol (19,05 mm)<\/td>55-60 minutos<\/td>55-60 minutos<\/td>45-60 minutos<\/td>25-30 minutos<\/td>50-55 minutos<\/td><\/tr>
1 pol (25 mm)<\/td>1 hora (a)<\/td>60 minutos<\/td>1 hora (a)<\/td>30 minutos<\/td>1 hora (a)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, tabelas de perman\u00eancia por regra pr\u00e1tica dos cap\u00edtulos D2, A2, A6, H13 e S7, p\u00e1ginas impressas 35, 51, 59, 66 e 72.<\/em><\/p>\n\n\n\n

(a) Para D2, A6 e S7, a fonte imprime a taxa por polegada acima de 1 in e um exemplo resolvido de 1 1\/2 in em 90 minutos ou 1 1\/2 hora. O valor de 1 in segue essa taxa, e a fonte usa 1 hora para uma se\u00e7\u00e3o de 1 in no exemplo do D2.<\/em><\/p>\n\n\n\n

Graus de t\u00eampera ao ar acima de 1 pol<\/h2>\n\n\n\n

D2, A2, A6, H13 e S7 endurecem ao ar calmo. Cada um deles perde a dureza total quando a se\u00e7\u00e3o ultrapassa um tamanho que a fonte declara para aquele grau, ent\u00e3o a taxa e esse limite s\u00e3o dados juntos abaixo.<\/p>\n\n\n\n

Tempo de manuten\u00e7\u00e3o e limites de t\u00eampera ao ar para D2, A2, A6, H13 e S7<\/h3>\n\n\n\n
Grau<\/th>temperatura de austenitiza\u00e7\u00e3o<\/th>Tempo de manuten\u00e7\u00e3o acima de 1 pol<\/th>Maior se\u00e7\u00e3o que ainda endurece ao ar<\/th><\/tr><\/thead>
D2<\/td>1850\u00b0F \/ 1010\u00b0C<\/td>1 hora por polegada da menor se\u00e7\u00e3o transversal<\/td>6 pol (150 mm)<\/td><\/tr>
A2<\/td>1750\u00b0F \/ 955\u00b0C<\/td>1 hora por polegada<\/td>5 pol (127 mm)<\/td><\/tr>
A6<\/td>1550\u00b0F \/ 845\u00b0C<\/td>1 hora por polegada<\/td>8 pol (200 mm)<\/td><\/tr>
H13<\/td>1850\u00b0F \/ 1010\u00b0C<\/td>30 minutos por polegada<\/td>12 pol (305 mm)<\/td><\/tr>
S7<\/td>1725\u00b0F \/ 940\u00b0C<\/td>1 hora por polegada<\/td>2 1\/2 pol (63 mm)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, perman\u00eancia e t\u00eampera dos mesmos cap\u00edtulos, p\u00e1ginas impressas 35, 42, 51, 53, 59, 60, 66, 67, 72 e 73.<\/em><\/p>\n\n\n\n

Classes de t\u00eampera em \u00f3leo, t\u00eampera em \u00e1gua e a\u00e7o r\u00e1pido<\/h2>\n\n\n\n

As classes de t\u00eampera em \u00f3leo e em \u00e1gua permanecem por uma fra\u00e7\u00e3o do tempo que as classes de t\u00eampera ao ar necessitam, e a fonte escreve a regra como uma adi\u00e7\u00e3o curta ap\u00f3s a pe\u00e7a atingir a temperatura, em vez de como uma taxa por polegada. O a\u00e7o r\u00e1pido M2 est\u00e1 na outra extremidade da escala de uma forma diferente, porque na maioria dos trabalhos \u00e9 mantido na temperatura por n\u00e3o mais que um ou dois minutos.<\/p>\n\n\n\n

Tempo de perman\u00eancia para os graus de \u00f3leo, \u00e1gua e alta velocidade<\/h3>\n\n\n\n
Grau<\/th>temperatura de austenitiza\u00e7\u00e3o<\/th>Tempo de manuten\u00e7\u00e3o<\/th>Meio de t\u00eampera<\/th><\/tr><\/thead>
O1<\/td>1500\u00b0F \/ 815\u00b0C<\/td>5 minutos por polegada da menor se\u00e7\u00e3o transversal, contados a partir do momento em que a pe\u00e7a atinge a temperatura<\/td>\u00d3leo<\/td><\/tr>
W1<\/td>1425\u00b0F \/ 775\u00b0C<\/td>5 minutos por polegada da menor se\u00e7\u00e3o transversal, contados a partir do momento em que a pe\u00e7a atinge a temperatura<\/td>\u00c1gua com 10% de sal<\/td><\/tr>
4140<\/td>1575\u00b0F \/ 855\u00b0C<\/td>5 minutos por polegada da menor se\u00e7\u00e3o transversal, contados a partir do momento em que a pe\u00e7a atinge a temperatura<\/td>\u00d3leo<\/td><\/tr>
M2 (alta velocidade)<\/td>2150-2275\u00b0F \/ 1175-1245\u00b0C<\/td>Sem perman\u00eancia em se\u00e7\u00e3o de 1 pol ou menos, no m\u00e1ximo um breve perman\u00eancia de 1 minuto, e no m\u00e1ximo 5 a 6 minutos em se\u00e7\u00e3o de 6 pol<\/td>\u00d3leo at\u00e9 1 a 1 1\/2 pol, t\u00eampera em \u00f3leo instant\u00e2nea acima disso<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, cap\u00edtulos O1, W1, AISI 4140 e M2, p\u00e1ginas impressas 78, 79, 85, 91 e 95.<\/em><\/p>\n\n\n\n

O tempo de perman\u00eancia do CPM 10V segue a dureza alvo<\/h2>\n\n\n\n

O CPM 10V \u00e9 escrito como tr\u00eas receitas na fonte porque a temperatura de austenitiza\u00e7\u00e3o equilibra desgaste e tenacidade. O tempo de perman\u00eancia diminui \u00e0 medida que a temperatura sobe, de 30 minutos por polegada na condi\u00e7\u00e3o mais tenaz at\u00e9 10 minutos por polegada na condi\u00e7\u00e3o de maior resist\u00eancia ao desgaste.<\/p>\n\n\n\n

Tempo de perman\u00eancia do CPM 10V por dureza alvo<\/h3>\n\n\n\n
Condi\u00e7\u00e3o<\/th>Dureza, HRC<\/th>Temperatura de t\u00eampera<\/th>Temperatura de revenimento<\/th>Revenimentos<\/th>Perman\u00eancia m\u00ednima por polegada<\/th><\/tr><\/thead>
Tenacidade \u00f3tima<\/td>58 a 60<\/td>1950\u00b0F \/ 1065\u00b0C<\/td>1000\u00b0F \/ 540\u00b0C<\/td>2 revenimentos<\/td>30 minutos<\/td><\/tr>
Boa tenacidade<\/td>60 a 62<\/td>2050\u00b0F \/ 1120\u00b0C<\/td>1000\u00b0F \/ 540\u00b0C<\/td>2 revenimentos<\/td>20 minutos<\/td><\/tr>
Tenacidade adequada<\/td>63 a 65<\/td>2150\u00b0F \/ 1175\u00b0C<\/td>1000\u00b0F \/ 540\u00b0C<\/td>3 revenimentos<\/td>10 minutos<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, cap\u00edtulo CPM 10V, p\u00e1gina impressa 101. Os valores de perman\u00eancia s\u00e3o por 1 pol (25,4 mm) de se\u00e7\u00e3o transversal. A fonte associa cada condi\u00e7\u00e3o a uma nota de desgaste e resist\u00eancia: tenacidade \u00f3tima com bom desgaste e bom n\u00edvel de resist\u00eancia, boa tenacidade com bom desgaste e n\u00edvel de resist\u00eancia intermedi\u00e1rio, e tenacidade adequada com desgaste \u00f3timo e n\u00edvel m\u00e1ximo de resist\u00eancia.<\/em><\/p>\n\n\n\n

Os dois tempos em torno da perman\u00eancia<\/h2>\n\n\n\n

Mantenha o pr\u00e9-aquecimento por 10 a 15 minutos, ou at\u00e9 que a pe\u00e7a esteja uniformemente aquecida, antes de elevar o forno \u00e0 temperatura de austenitiza\u00e7\u00e3o. Os cap\u00edtulos das classes repetem esse valor para cada classe desta p\u00e1gina.<\/p>\n\n\n\n

O revenimento \u00e9 mantido por 2 horas por polegada da menor se\u00e7\u00e3o transversal. As classes de alta liga recebem um segundo revenimento 25\u00b0F (14\u00b0C) abaixo do primeiro, com a pe\u00e7a retornando \u00e0 temperatura ambiente entre eles, e o cap\u00edtulo do A2 acrescenta que mesmo uma pe\u00e7a de 1\/4 in \u00e9 melhor mantida pelas 2 horas completas.<\/p>\n\n\n\n

Perman\u00eancias longas s\u00e3o a falha sobre a qual a fonte mais alerta. Os cap\u00edtulos do A6, H13 e S7 afirmam que uma perman\u00eancia longa na temperatura de pr\u00e9-aquecimento desorganiza a estrutura; o cap\u00edtulo do M2 afirma que a perman\u00eancia na temperatura de austenitiza\u00e7\u00e3o deve ser seguida rigidamente pelo mesmo motivo; e o cap\u00edtulo do D2 abre sua se\u00e7\u00e3o de perman\u00eancia chamando a regra simples de 1 hora por polegada de enganosa para pe\u00e7as pequenas. As tabelas de regras pr\u00e1ticas desta p\u00e1gina existem por esse motivo.<\/p>\n\n\n\n

\n

Tabela de Tempo de Perman\u00eancia para A\u00e7o Ferramenta, PDF para impress\u00e3o<\/strong><\/p>\n\n\n\n

Um PDF com as tabelas de tempo de perman\u00eancia para os graus de t\u00eampera ao ar, t\u00eampera em \u00f3leo, t\u00eampera em \u00e1gua e alta velocidade desta p\u00e1gina, impressas a partir das tabelas da fonte, com nossos dados de contato.<\/p>\n\n\n\n

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Baixar PDF, 396 KB<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n

Antes do tratamento t\u00e9rmico<\/h2>\n\n\n\n

The grades on this page are supplied annealed. Preheat and austenitizing temperatures for a wider list of grades are on the tabela de t\u00eampera e revenimento de a\u00e7o para ferramentas<\/a>, a pr\u00e1tica de manuten\u00e7\u00e3o na etapa de revenimento est\u00e1 na Tabela de revenimento de a\u00e7o para ferramentas<\/a>, e as temperaturas de recozimento macio est\u00e3o na gr\u00e1fico de temperaturas de recozimento e normaliza\u00e7\u00e3o de a\u00e7o ferramenta<\/a>. Para os pr\u00f3prios graus, consulte as a\u00e7o ferramenta D2<\/a>, A\u00e7o para ferramentas A2<\/a>, A\u00e7o ferramenta H13<\/a>, A\u00e7o ferramenta S7<\/a>, A\u00e7o ferramenta O1<\/a> e A\u00e7o ferramenta M2<\/a> p\u00e1ginas, e para o 4140 consulte suas propriedades e tratamento t\u00e9rmico<\/a> p\u00e1gina.<\/p>\n\n\n\n

Dados de refer\u00eancia compilados de Heat Treatment, Selection, and Application of Tool Steels (William E. Bryson, 2\u00aa edi\u00e7\u00e3o, Hanser), se\u00e7\u00f5es de tempo de perman\u00eancia dos cap\u00edtulos 5 a 14 e 21.<\/p>","protected":false},"excerpt":{"rendered":"

Tool Steel Soak Time Chart Soak time is the time the steel is held at the austenitizing temperature, set by two factors: the grade and the part’s smallest cross section. The tables on this page give that hold time for the grades used in mold, tool and die work, taken from the soak sections printed […]<\/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":"default","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":"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-19653","page","type-page","status-publish","hentry"],"yoast_head":"\nTool Steel Soak Time Chart | Hold Time by Grade and Section<\/title>\n<meta name=\"description\" content=\"How long to hold tool steel at the austenitizing temperature, by grade and by smallest cross section. 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