{"id":20830,"date":"2026-10-03T16:48:52","date_gmt":"2026-10-03T08:48:52","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=20830"},"modified":"2026-10-16T16:08:32","modified_gmt":"2026-10-16T08:08:32","slug":"obsolete-tool-steel-grades","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/obsolete-tool-steel-grades\/","title":{"rendered":"Grados de acero para herramientas que ya no se usan com\u00fanmente, composiciones"},"content":{"rendered":"

Grados de acero para herramientas que ya no se usan com\u00fanmente, composiciones<\/h1>\n\n\n\n

Los grados de acero para herramientas dejan de usarse por razones comerciales ordinarias. La demanda de un tipo cae, los trenes de laminaci\u00f3n dejan de producirlo y la AISI mantiene la designaci\u00f3n durante a\u00f1os despu\u00e9s de la \u00faltima colada. Eso importa en dos situaciones. Un plano redactado en la d\u00e9cada de 1980 puede seguir nombrando un grado que nadie vende, y una herramienta que llega para reparaci\u00f3n puede estar marcada con uno. Esta p\u00e1gina enumera las composiciones de los aceros para herramientas que ya no se usan com\u00fanmente, agrupadas de la misma manera que las agrupa la fuente, para que el grado nombrado en un plano antiguo pueda compararse con lo que est\u00e1 disponible ahora.<\/p>\n\n\n\n

Qu\u00e9 cubre la tabla<\/h2>\n\n\n\n

La tabla abarca las familias de acero para herramientas en lugar de una sola de ellas: alta velocidad, trabajo en caliente, trabajo en fr\u00edo, resistencia al choque, moldeo, prop\u00f3sito especial y temple en agua aparecen todas en ella, porque un grado puede caer en desuso en cualquiera de ellas. Las columnas de composici\u00f3n son las mismas que se usan para los grados que a\u00fan est\u00e1n en producci\u00f3n, por lo que una fila aqu\u00ed puede leerse directamente contra las tablas de los grados actuales. Donde un valor se imprime como un guion, la fuente no indica nada para ese elemento, y donde la columna Otros contiene un elemento que el resto de esa fila no tiene, se imprime all\u00ed.<\/p>\n\n\n\n

Tipo<\/th>C<\/th>W<\/th>Mo<\/th>Cr<\/th>V<\/th>Otros<\/th><\/tr><\/thead>
Aceros de alta velocidad<\/td><\/tr>
M6<\/td>0.80<\/td>4.25<\/td>5.00<\/td>4.00<\/td>1.50<\/td>12.00 Co<\/td><\/tr>
M8<\/td>0.80<\/td>5.00<\/td>5.00<\/td>4.00<\/td>1.50<\/td>1.25 Nb<\/td><\/tr>
M15<\/td>1.50<\/td>6.50<\/td>3.50<\/td>4.00<\/td>5.00<\/td>5.00 Co<\/td><\/tr>
M45<\/td>1.25<\/td>8.00<\/td>5.00<\/td>4.25<\/td>1.60<\/td>5.50 Co<\/td><\/tr>
T3<\/td>1.05<\/td>18.00<\/td>—<\/td>4.00<\/td>3.00<\/td>—<\/td><\/tr>
T7<\/td>0.75<\/td>14.00<\/td>—<\/td>4.00<\/td>2.00<\/td>—<\/td><\/tr>
T9<\/td>1.20<\/td>18.00<\/td>—<\/td>4.00<\/td>4.00<\/td>—<\/td><\/tr>
Aceros para trabajo en caliente<\/td><\/tr>
H15<\/td>0.40<\/td>—<\/td>5.00<\/td>5.00<\/td>—<\/td>—<\/td><\/tr>
H16<\/td>0.55<\/td>7.00<\/td>—<\/td>7.00<\/td>—<\/td>—<\/td><\/tr>
H20<\/td>0.35<\/td>9.00<\/td>—<\/td>2.00<\/td>—<\/td>—<\/td><\/tr>
H41<\/td>0.65<\/td>1.50<\/td>8.00<\/td>4.00<\/td>1.00<\/td>—<\/td><\/tr>
H43<\/td>0.55<\/td>—<\/td>8.00<\/td>4.00<\/td>2.00<\/td>—<\/td><\/tr>
Aceros para trabajo en fr\u00edo<\/td><\/tr>
D1<\/td>1.00<\/td>—<\/td>1.00<\/td>12.00<\/td>—<\/td>—<\/td><\/tr>
D6 (a)<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
A5<\/td>1.00<\/td>—<\/td>1.00<\/td>1.00<\/td>—<\/td>3.00 Mn<\/td><\/tr>
Aceros resistentes al impacto<\/td><\/tr>
S3<\/td>0.50<\/td>1.00<\/td>—<\/td>0.74<\/td>—<\/td>—<\/td><\/tr>
S4<\/td>0.55<\/td>—<\/td>—<\/td>—<\/td>—<\/td>2.00 Si, 0.80 Mn<\/td><\/tr>
Acero para moldes<\/td><\/tr>
P1<\/td>0.10<\/td>—<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
Aceros para prop\u00f3sito especial<\/td><\/tr>
L1<\/td>1.00<\/td>—<\/td>—<\/td>1.25<\/td>—<\/td>—<\/td><\/tr>
L3<\/td>1.00<\/td>—<\/td>—<\/td>1.50<\/td>0.20<\/td>—<\/td><\/tr>
L4<\/td>1.00<\/td>—<\/td>—<\/td>1.50<\/td>0.25<\/td>0.60 Mn<\/td><\/tr>
L5<\/td>1.00<\/td>—<\/td>0.25<\/td>1.00<\/td>—<\/td>1.00 Mn<\/td><\/tr>
L7<\/td>1.00<\/td>—<\/td>0.40<\/td>1.40<\/td>—<\/td>0.35 Mn<\/td><\/tr>
F1<\/td>1.00<\/td>1.25<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
F2<\/td>1.25<\/td>3.50<\/td>—<\/td>—<\/td>—<\/td>—<\/td><\/tr>
F3<\/td>1.25<\/td>3.50<\/td>—<\/td>0.75<\/td>—<\/td>—<\/td><\/tr>
Aceros para herramientas endurecibles mediante agua<\/td><\/tr>
W3<\/td>1.00<\/td>—<\/td>—<\/td>—<\/td>0.50<\/td>—<\/td><\/tr>
W4<\/td>0.60\/1.40 (b)<\/td>—<\/td>—<\/td>0.25<\/td>—<\/td>—<\/td><\/tr>
W6<\/td>1.00<\/td>—<\/td>—<\/td>0.25<\/td>0.25<\/td>—<\/td><\/tr>
W7<\/td>1.00<\/td>—<\/td>—<\/td>0.50<\/td>0.20<\/td>—<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente, ASM Handbook Vol.1, art\u00edculo Wrought Tool Steels, Tabla 3. Notas al pie de la fuente, (a) D6 ahora est\u00e1 incluido con D3 en la Tabla 1, por lo que la fuente imprime el grado sin una composici\u00f3n separada para \u00e9l, (b) varios contenidos de carbono estaban disponibles para W4. Un guion significa que la fuente no lista ning\u00fan valor.<\/em><\/p>\n\n\n\n

Los grados que se encuentran con mayor frecuencia en planos antiguos<\/h2>\n\n\n\n

Cuatro de estos aparecen con suficiente frecuencia como para merecer ser nombrados. T3, T7 y T9 son los aceros r\u00e1pidos al tungsteno entre T1 y T15, y pertenecen a la misma familia que los T1 y T15 que todav\u00eda se venden, por lo que un plano que solicita T3 generalmente se satisface con un grado al tungsteno actual o con el equivalente al molibdeno seg\u00fan la aplicaci\u00f3n. H20 y H15 son grados para trabajo en caliente anteriores a que la serie de trabajo en caliente al cromo se estableciera en H11, H12 y H13, y ambos tienen mayor contenido de tungsteno que cualquier cosa fabricada hoy. D1 es el grado de trabajo en fr\u00edo con 12 por ciento de cromo que D2 y D3 desplazaron en gran medida, y D6 se ha integrado por completo en D3. F1, F2 y F3 son los grados especiales de carbono-tungsteno, y su equivalente actual m\u00e1s cercano es un grado de temple en agua con m\u00e1s aleaci\u00f3n.<\/p>\n\n\n\n

Sustituci\u00f3n de un grado que ya no se fabrica<\/h2>\n\n\n\n

Un grado descontinuado generalmente no se reemplaza por una coincidencia qu\u00edmica, porque no hay coincidencia. El enfoque \u00fatil es remontarse a la propiedad para la que se escribi\u00f3 el plano, y luego elegir entre los grados que est\u00e1n disponibles. En la familia de aceros r\u00e1pidos al tungsteno la sustituci\u00f3n normalmente se hace por dureza en caliente, y los grados al tungsteno actuales o los grados de cobalto-molibdeno cubren el mismo rango. En trabajo en caliente la sustituci\u00f3n se hace por la dureza de trabajo y por la resistencia a la fatiga t\u00e9rmica. En trabajo en fr\u00edo la sustituci\u00f3n se hace por la resistencia al desgaste a una dureza dada, que es donde se ubican la serie D actual y los grados de trabajo en fr\u00edo P\/M. Dos cosas se mantienen ciertas en todos los casos: la dureza en el plano es la dureza para la que se dise\u00f1\u00f3 la herramienta y debe igualarse en lugar de superarse, y el ciclo de tratamiento t\u00e9rmico debe tomarse del grado realmente suministrado en lugar del plano antiguo.<\/p>\n\n\n\n

Los datos de composici\u00f3n son solo de referencia general. Los valores reales var\u00edan seg\u00fan la norma, la acer\u00eda y el n\u00famero de colada. Confirme con el certificado de ensayo del material (MTC) o contacte con Aobo Steel.<\/p>\n\n\n\n

A d\u00f3nde ir despu\u00e9s<\/h2>\n\n\n\n

Las composiciones de los grados que todav\u00eda se fabrican est\u00e1n en la Tabla de composici\u00f3n del acero para herramientas<\/a>, y las propiedades de los grupos L y S, ambos de los cuales perdieron grados a esta lista, est\u00e1n en la propiedades de la serie L y la serie S<\/a> p\u00e1gina. Las propiedades que deciden una sustituci\u00f3n est\u00e1n reunidas en la tabla de propiedades del acero para herramientas<\/a>. Aobo Steel cotizar\u00e1 un equivalente actual contra un plano que nombre un grado descontinuado.<\/p>\n\n\n\n

Fuente: ASM Handbook, Vol 1, Properties and Selection: Irons, Steels and High-Performance Alloys.<\/p>","protected":false},"excerpt":{"rendered":"

Tool Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may […]<\/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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Compositions<\/title>\n<meta name=\"description\" content=\"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/es\/obsolete-tool-steel-grades\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tool Steel Grades No Longer in Common Use, Compositions\" \/>\n<meta property=\"og:description\" content=\"Compositions of the tool steel grades no longer in common use, M6 to W7, grouped by family, for checking a grade named on an old drawing or tool.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/es\/obsolete-tool-steel-grades\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta 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Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may…","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Tool Steel Grades No Longer in Common Use, Compositions Tool steel grades go out of use for the ordinary commercial reasons. Demand for a type falls, the mills stop rolling it, and the AISI keeps the designation for years after the last heat. That matters in two situations. A drawing written in the 1980s may…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/comments?post=20830"}],"version-history":[{"count":4,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20830\/revisions"}],"predecessor-version":[{"id":23184,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20830\/revisions\/23184"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/media?parent=20830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}