{"id":19291,"date":"2026-09-19T07:35:21","date_gmt":"2026-09-18T23:35:21","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19291"},"modified":"2026-10-22T12:10:53","modified_gmt":"2026-10-22T04:10:53","slug":"minimum-thickness-for-hardness-testing","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/minimum-thickness-for-hardness-testing\/","title":{"rendered":"Espesor m\u00ednimo para el ensayo de dureza del acero para herramientas"},"content":{"rendered":"

Espesor m\u00ednimo para el ensayo de dureza del acero para herramientas<\/h1>\n\n\n\n

Un ensayo de dureza presiona un penetrador contra la pieza, y el material alrededor de la huella se deforma con \u00e9l. Si la pieza es demasiado delgada para la carga, la lectura ya no corresponde a la dureza del material. Esta p\u00e1gina recoge los l\u00edmites de espesor publicados para cada carga Rockwell y Brinell.<\/p>\n\n\n\n

La regla detr\u00e1s de los l\u00edmites<\/h2>\n\n\n\n

La tabla sigue un espesor de al menos diez veces la profundidad de la huella para penetradores de diamante y quince veces para penetradores de bola. Los valores publicados se establecieron sobre acero de bajo carbono y sobre fleje de acero templado y revenido, por lo que son una gu\u00eda verificada con datos de ensayo m\u00e1s que un l\u00edmite te\u00f3rico.<\/p>\n\n\n\n

Un n\u00famero Rockwell equivale a 0,002 mm de profundidad en las escalas est\u00e1ndar y a 0,001 mm en las escalas superficiales. Una lectura de 60 HRC significa por tanto que el penetrador penetr\u00f3 0,08 mm en la pieza entre la carga menor y la carga mayor, y los l\u00edmites siguientes son esa aritm\u00e9tica aplicada a cada escala.<\/p>\n\n\n\n

El material m\u00e1s delgado que la \u00faltima fila de la tabla debe ensayarse mediante un m\u00e9todo de microindentaci\u00f3n. Para un penetrador Vickers la pieza debe tener al menos 1,5 veces la diagonal de la huella de espesor, y para un penetrador Knoop al menos la mitad de la diagonal larga.<\/p>\n\n\n\n

Despu\u00e9s del primer ensayo, examine la cara directamente bajo la huella. Un abultamiento o una marca en la cara inferior es el efecto del yunque, lo que significa que la pieza es demasiado delgada para esa carga y debe usarse la siguiente escala m\u00e1s ligera. Inspeccione tambi\u00e9n el yunque, porque una superficie de yunque da\u00f1ada hace que las lecturas siguientes salgan bajas.<\/p>\n\n\n\n

No se permite apilar probetas delgadas para conseguir espesor, porque las piezas se deslizan entre s\u00ed. Cuando todav\u00eda sea v\u00e1lida m\u00e1s de una escala, use la carga m\u00e1s pesada, porque la huella mayor abarca m\u00e1s material y devuelve un valor m\u00e1s representativo de la pieza.<\/p>\n\n\n\n

Dureza m\u00ednima para el ensayo Rockwell en cada espesor<\/h2>\n\n\n\n

Lea la fila correspondiente al espesor de la pieza. Si la pieza es m\u00e1s dura que el valor de esa columna, la escala y la carga no pueden usarse de forma segura y debe elegirse la siguiente escala m\u00e1s ligera.<\/p>\n\n\n\n

Espesor
mm<\/th>		Espesor
en.<\/th>		A
60 kgf<\/th>		D
100 kgf<\/th>		C
150 kgf<\/th>		15N
15 kgf<\/th>		30N
30 kgf<\/th>		45N
45 kgf<\/th><\/tr><\/thead>
0.127<\/td>0.005<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
0.152<\/td>0.006<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>92<\/td>\u2026<\/td>\u2026<\/td><\/tr>
0.203<\/td>0.008<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>90<\/td>\u2026<\/td>\u2026<\/td><\/tr>
0.254<\/td>0.010<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>88<\/td>\u2026<\/td>\u2026<\/td><\/tr>
0.305<\/td>0.012<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>83<\/td>82<\/td>77<\/td><\/tr>
0.356<\/td>0.014<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>76<\/td>78.5<\/td>74<\/td><\/tr>
0.381<\/td>0.015<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
0.406<\/td>0.016<\/td>86<\/td>\u2026<\/td>\u2026<\/td>68<\/td>74<\/td>72<\/td><\/tr>
0.457<\/td>0.018<\/td>84<\/td>\u2026<\/td>\u2026<\/td>(a)<\/td>66<\/td>68<\/td><\/tr>
0.508<\/td>0.020<\/td>82<\/td>77<\/td>\u2026<\/td>(a)<\/td>57<\/td>63<\/td><\/tr>
0.559<\/td>0.022<\/td>78<\/td>75<\/td>69<\/td>(a)<\/td>47<\/td>58<\/td><\/tr>
0.610<\/td>0.024<\/td>76<\/td>72<\/td>67<\/td>(a)<\/td>(a)<\/td>51<\/td><\/tr>
0.635<\/td>0.025<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>(a)<\/td>(a)<\/td>\u2026<\/td><\/tr>
0.660<\/td>0.026<\/td>71<\/td>68<\/td>65<\/td>(a)<\/td>(a)<\/td>37<\/td><\/tr>
0.711<\/td>0.028<\/td>67<\/td>63<\/td>62<\/td>(a)<\/td>(a)<\/td>20<\/td><\/tr>
0.762<\/td>0.030<\/td>60<\/td>58<\/td>57<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
0.813<\/td>0.032<\/td>(a)<\/td>51<\/td>52<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
0.864<\/td>0.034<\/td>(a)<\/td>43<\/td>45<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
0.889<\/td>0.035<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
0.914<\/td>0.036<\/td>(a)<\/td>(a)<\/td>37<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
0.965<\/td>0.038<\/td>(a)<\/td>(a)<\/td>28<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr>
1.016<\/td>0.040<\/td>(a)<\/td>(a)<\/td>20<\/td>(a)<\/td>(a)<\/td>(a)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente: ASM Handbook, Vol. 8, valores m\u00ednimos de dureza del metal de trabajo para ensayar diversos espesores de metales con dur\u00f3metros Rockwell est\u00e1ndar y superficial. (a) significa que no hay dureza m\u00ednima para metal de espesor igual o mayor. La tabla de origen tambi\u00e9n incluye las columnas de penetrador de bola para las escalas B, F, G, 15T, 30T y 45T, que se aplican a metales blandos como las aleaciones de cobre y aluminio y no se reproducen aqu\u00ed.<\/em><\/p>\n\n\n\n

Ejemplo resuelto para un fleje delgado endurecido<\/h2>\n\n\n\n

El caso que decide en qu\u00e9 escala puede ensayarse una secci\u00f3n delgada endurecida es un fleje de acero para herramientas de 0,36 mm (0,014 in.) a 63 HRC, que es demasiado delgado para la escala C.<\/p>\n\n\n\n

Un valor de 63 HRC necesita unos 0,71 mm (0,028 in.) de espesor para un ensayo v\u00e1lido en la escala C, por lo que el fleje no puede ensayarse en esa escala. Convertido a las escalas superficiales, 63 HRC es aproximadamente 69,9 HR45N, 80,1 HR30N y 91,4 HR15N.<\/p>\n\n\n\n

La escala 45N queda descartada, porque la tabla exige al menos 74 HR45N a ese espesor. La escala 30N exige al menos 80 HR30N y la escala 15N al menos 76 HR15N, por lo que puede usarse cualquiera de las dos.<\/p>\n\n\n\n

Entre las dos, la 30N es la mejor opci\u00f3n. Un punto de dureza en la escala 30N equivale a aproximadamente medio punto en la escala 15N en el rango de acero duro, por lo que la escala 30N separa mejor las peque\u00f1as diferencias.<\/p>\n\n\n\n

Espesor m\u00ednimo para el ensayo Brinell<\/h2>\n\n\n\n

La bola Brinell deja una impresi\u00f3n mayor y m\u00e1s profunda que el penetrador Rockwell, por lo que el l\u00edmite de espesor se alcanza antes. La tabla indica la dureza m\u00ednima que puede ensayarse de forma segura con dos espesores de probeta con una bola de 10 mm.<\/p>\n\n\n\n

Espesor m\u00ednimo
mm<\/th>		Espesor m\u00ednimo
en.<\/th>		3000 kgf
load<\/th>		1500 kgf
load<\/th>		500 kgf
load<\/th><\/tr><\/thead>
1.6<\/td>0.0625<\/td>602<\/td>301<\/td>100<\/td><\/tr>
3.2<\/td>0.125<\/td>301<\/td>150<\/td>50<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente: ASM Handbook, Vol. 8, requisitos de espesor m\u00ednimo para los ensayos de dureza Brinell. Una probeta debe tener al menos diez veces la profundidad de la impresi\u00f3n de espesor, que es 3,2 mm (0,125 in.) para una lectura de 300 HB a 3000 kgf. El material por encima de 375 HB, unos 40 HRC, pasa a la escala Rockwell C o a Vickers.<\/em><\/p>\n\n\n\n

D\u00f3nde importan los l\u00edmites en el acero para herramientas<\/h2>\n\n\n\n

El material para cuchillas, las cuchillas de hendido, las matrices de calce y las hojas de sierra llegan endurecidos y delgados. La escala C normalmente queda descartada en el \u00faltimo margen de rectificado, y las escalas superficiales N son el m\u00e9todo que sigue siendo v\u00e1lido.<\/p>\n\n\n\n

La misma l\u00f3gica de espesor se aplica a una capa nitrurada o endurecida por inducci\u00f3n. Una carga que atraviesa la capa lee la dureza del n\u00facleo y el valor sale bajo.<\/p>\n\n\n\n

La lectura debe tomarse sobre una superficie plana rectificada, lejos del borde cizallado o cortado con l\u00e1ser, y sobre material por debajo de la capa descarburada. Una preparaci\u00f3n superficial que caliente o deforme en fr\u00edo la superficie cambia el valor que se obtiene.<\/p>\n\n\n\n

Antes de cotizar un valor de dureza<\/h2>\n\n\n\n

Los l\u00edmites de esta p\u00e1gina suponen una probeta limpia, plana y paralela. Un radio, una rebaba, un borde cizallado o un yunque da\u00f1ado alteran el resultado, y el menor de esos efectos es mayor que la tolerancia del propio ensayo.<\/p>\n\n\n\n

Los valores son datos de referencia publicados. Confirme los criterios de aceptaci\u00f3n, la escala y la ubicaci\u00f3n del ensayo seg\u00fan la norma que rige su propio producto, y mantenga la lectura dentro de la banda v\u00e1lida de la escala que elija.<\/p>\n\n\n\n

P\u00e1ginas de referencia relacionadas en este sitio: Factores de correcci\u00f3n del ensayo de dureza para barra redonda<\/a>, M\u00e9todos de ensayo de dureza<\/a>, Calculadora de conversi\u00f3n de dureza del acero para herramientas<\/a>, Verificaci\u00f3n de la calidad del acero para herramientas<\/a>, Suministro de acero para herramientas<\/a>.<\/p>\n\n\n\n

Fuente: ASM Handbook, Volume 8, Mechanical Testing and Evaluation (ASM International), art\u00edculo Macroindentation Hardness Testing de Edward L. Tobolski, Wilson Instruments Division, Instron Corporation y Andrew Fee, Consultor, y art\u00edculo Selection and Industrial Applications of Hardness Tests de Andrew Fee, Consultor. Los valores se reproducen solo como referencia. Aobo Steel suministra acero para herramientas en condici\u00f3n recocida.<\/em><\/p>","protected":false},"excerpt":{"rendered":"

Minimum Thickness for Hardness Testing Tool Steel A hardness test presses an indenter into the part, and the material around the indentation is deformed with it. If the part is too thin for the load, the reading is no longer the hardness of the material. This page carries the published thickness limits for each Rockwell […]<\/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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Thickness for Hardness Testing Tool Steel A hardness test presses an indenter into the part, and the material around the indentation is deformed with it. If the part is too thin for the load, the reading is no longer the hardness of the material. This page carries the published thickness limits for each Rockwell…","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":"Minimum Thickness for Hardness Testing Tool Steel A hardness test presses an indenter into the part, and the material around the indentation is deformed with it. If the part is too thin for the load, the reading is no longer the hardness of the material. This page carries the published thickness limits for each Rockwell…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/19291","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=19291"}],"version-history":[{"count":5,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/19291\/revisions"}],"predecessor-version":[{"id":24084,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/19291\/revisions\/24084"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/media?parent=19291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}