{"id":19287,"date":"2026-09-19T07:33:13","date_gmt":"2026-09-18T23:33:13","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19287"},"modified":"2026-10-22T12:10:48","modified_gmt":"2026-10-22T04:10:48","slug":"hardness-test-correction-factors-round-bar","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/hardness-test-correction-factors-round-bar\/","title":{"rendered":"Factores de correcci\u00f3n del ensayo de dureza para barra redonda"},"content":{"rendered":"

Factores de correcci\u00f3n del ensayo de dureza para barra redonda<\/h1>\n\n\n\n

Una lectura de dureza tomada sobre una barra redonda no es el mismo valor que una lectura tomada sobre material plano del mismo material. Esta p\u00e1gina contiene los factores de correcci\u00f3n publicados para piezas cil\u00edndricas en las escalas Rockwell, con los l\u00edmites de di\u00e1metro que determinan cu\u00e1ndo se necesita una correcci\u00f3n.<\/p>\n\n\n\n

Por qu\u00e9 una superficie curva da una lectura baja<\/h2>\n\n\n\n

Cuando se fuerza un penetrador contra una superficie convexa hay menos soporte lateral para la fuerza de penetraci\u00f3n, por lo que el penetrador se hunde m\u00e1s de lo que lo har\u00eda en una superficie plana de la misma dureza y la lectura resulta baja. En una superficie c\u00f3ncava el soporte adicional produce el efecto opuesto, y la lectura resulta alta.<\/p>\n\n\n\n

Los valores de correcci\u00f3n se suman a la lectura observada en una superficie convexa y se restan de ella en una superficie c\u00f3ncava. Los valores publicados son promedios al medio n\u00famero Rockwell m\u00e1s cercano, tomados de mediciones de varios laboratorios y del an\u00e1lisis del mismo problema.<\/p>\n\n\n\n

Por encima de 25 mm (1 in.) de di\u00e1metro la diferencia es despreciable en las escalas Rockwell. Por debajo de ese di\u00e1metro, y en particular en material m\u00e1s blando donde la huella es mayor, la curvatura debe corregirse antes de comparar el valor con una superficie plana o con otro di\u00e1metro.<\/p>\n\n\n\n

Las escalas Rockwell regulares pueden usarse en cilindros hasta 6,35 mm (0,25 in.) de di\u00e1metro, por lo que la columna de 3,175 mm est\u00e1 en blanco para las escalas C, D y A. Los valores de correcci\u00f3n superficiales llegan hasta 3,175 mm (0,125 in.), y por debajo de ese di\u00e1metro la pieza corresponde a un m\u00e9todo de microindentaci\u00f3n.<\/p>\n\n\n\n

Un resultado tomado sobre una superficie curva no debe informarse sin el radio de curvatura. La exactitud en piezas cil\u00edndricas tambi\u00e9n depende de la alineaci\u00f3n del tornillo elevador, del yunque en V y del penetrador, y del acabado superficial y la rectitud de la barra. Para el ensayo Brinell el radio de curvatura debe ser mayor que 2,5 veces el di\u00e1metro de la bola del penetrador.<\/p>\n\n\n\n

Factores de correcci\u00f3n para piezas cil\u00edndricas, Rockwell est\u00e1ndar<\/h2>\n\n\n\n

Sume el valor en la superficie exterior de un cilindro y r\u00e9stelo en una superficie interior. Las columnas son el di\u00e1metro de la pieza.<\/p>\n\n\n\n

Penetrador de diamante, escalas Rockwell C, D y A<\/h3>\n\n\n\n
Lectura observada<\/th>3.175
0.125 in.<\/th>		6.350
0.250 in.<\/th>		9.525
0.375 in.<\/th>		12.700
0.500 in.<\/th>		15.875
0.625 in.<\/th>		19.050
0.750 in.<\/th>		22.225
0.875 in.<\/th>		25.400
1.000 in.<\/th><\/tr><\/thead>
80<\/td>\u2026<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
70<\/td>\u2026<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td><\/tr>
60<\/td>\u2026<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>0.5<\/td><\/tr>
50<\/td>\u2026<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td><\/tr>
40<\/td>\u2026<\/td>3.5<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>1.0<\/td><\/tr>
30<\/td>\u2026<\/td>5.0<\/td>3.5<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.5<\/td>1.0<\/td><\/tr>
20<\/td>\u2026<\/td>6.0<\/td>4.5<\/td>3.5<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Penetrador de bola de 1,588 mm (1\/16 in.), escalas Rockwell B, F y G<\/h3>\n\n\n\n
Lectura observada<\/th>3.175
0.125 in.<\/th>		6.350
0.250 in.<\/th>		9.525
0.375 in.<\/th>		12.700
0.500 in.<\/th>		15.875
0.625 in.<\/th>		19.050
0.750 in.<\/th>		22.225
0.875 in.<\/th>		25.400
1.000 in.<\/th><\/tr><\/thead>
100<\/td>\u2026<\/td>3.5<\/td>2.5<\/td>1.5<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td><\/tr>
90<\/td>\u2026<\/td>4.0<\/td>3.0<\/td>2.0<\/td>1.5<\/td>1.5<\/td>1.5<\/td>1.0<\/td><\/tr>
80<\/td>\u2026<\/td>5.0<\/td>3.5<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.5<\/td>1.5<\/td><\/tr>
70<\/td>\u2026<\/td>6.0<\/td>4.0<\/td>3.0<\/td>2.5<\/td>2.0<\/td>2.0<\/td>1.5<\/td><\/tr>
60<\/td>\u2026<\/td>7.0<\/td>5.0<\/td>3.5<\/td>3.0<\/td>2.5<\/td>2.0<\/td>2.0<\/td><\/tr>
50<\/td>\u2026<\/td>8.0<\/td>5.5<\/td>4.0<\/td>3.5<\/td>3.0<\/td>2.5<\/td>2.0<\/td><\/tr>
40<\/td>\u2026<\/td>9.0<\/td>6.0<\/td>4.5<\/td>4.0<\/td>3.0<\/td>2.5<\/td>2.5<\/td><\/tr>
30<\/td>\u2026<\/td>10.0<\/td>6.5<\/td>5.0<\/td>4.5<\/td>3.5<\/td>3.0<\/td>2.5<\/td><\/tr>
20<\/td>\u2026<\/td>11.0<\/td>7.5<\/td>5.5<\/td>4.5<\/td>4.0<\/td>3.5<\/td>3.0<\/td><\/tr>
10<\/td>\u2026<\/td>12.0<\/td>8.0<\/td>6.0<\/td>5.0<\/td>4.0<\/td>3.5<\/td>3.0<\/td><\/tr>
0<\/td>\u2026<\/td>12.5<\/td>8.5<\/td>6.5<\/td>5.5<\/td>4.5<\/td>3.5<\/td>3.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente: ASM Handbook, Vol. 8, factores de correcci\u00f3n para piezas cil\u00edndricas ensayadas con dur\u00f3metros Rockwell est\u00e1ndar.<\/em><\/p>\n\n\n\n

Factores de correcci\u00f3n para piezas cil\u00edndricas, Rockwell superficial<\/h2>\n\n\n\n

Las escalas superficiales se usan en secciones delgadas y profundidades de capa superficiales, donde las escalas regulares son demasiado severas para la pieza.<\/p>\n\n\n\n

Penetrador de diamante, escalas Rockwell 15N, 30N y 45N<\/h3>\n\n\n\n
Lectura observada<\/th>3.175
0.125 in.<\/th>		6.350
0.250 in.<\/th>		9.525
0.375 in.<\/th>		12.700
0.500 in.<\/th>		15.875
0.625 in.<\/th>		19.050
0.750 in.<\/th>		22.225
0.875 in.<\/th>		25.400
1.000 in.<\/th><\/tr><\/thead>
90<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
85<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
80<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td>\u2026<\/td><\/tr>
75<\/td>1.5<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>\u2026<\/td><\/tr>
70<\/td>2.0<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>0.5<\/td><\/tr>
65<\/td>2.5<\/td>1.5<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>0.5<\/td><\/tr>
60<\/td>3.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>0.5<\/td><\/tr>
55<\/td>3.5<\/td>2.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td>\u2026<\/td>0.5<\/td><\/tr>
50<\/td>3.5<\/td>2.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>1.0<\/td>\u2026<\/td>0.5<\/td><\/tr>
45<\/td>4.0<\/td>2.5<\/td>2.0<\/td>1.0<\/td>1.0<\/td>1.0<\/td>\u2026<\/td>1.0<\/td><\/tr>
40<\/td>4.5<\/td>3.0<\/td>2.0<\/td>1.5<\/td>1.0<\/td>1.0<\/td>\u2026<\/td>1.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Penetrador de bola de 1,588 mm (1\/16 in.), escalas Rockwell 15T, 30T y 45T<\/h3>\n\n\n\n
Lectura observada<\/th>3.175
0.125 in.<\/th>		6.350
0.250 in.<\/th>		9.525
0.375 in.<\/th>		12.700
0.500 in.<\/th>		15.875
0.625 in.<\/th>		19.050
0.750 in.<\/th>		22.225
0.875 in.<\/th>		25.400
1.000 in.<\/th><\/tr><\/thead>
90<\/td>1.5<\/td>1.0<\/td>1.0<\/td>0.5<\/td>0.5<\/td>0.5<\/td>\u2026<\/td>0.5<\/td><\/tr>
80<\/td>3.0<\/td>2.0<\/td>1.5<\/td>1.5<\/td>1.0<\/td>1.0<\/td>\u2026<\/td>0.5<\/td><\/tr>
70<\/td>5.0<\/td>3.5<\/td>2.5<\/td>2.0<\/td>1.5<\/td>1.0<\/td>\u2026<\/td>1.0<\/td><\/tr>
60<\/td>6.5<\/td>4.5<\/td>3.0<\/td>2.5<\/td>2.0<\/td>1.5<\/td>\u2026<\/td>1.5<\/td><\/tr>
50<\/td>8.5<\/td>5.5<\/td>4.0<\/td>3.0<\/td>2.5<\/td>2.0<\/td>\u2026<\/td>1.5<\/td><\/tr>
40<\/td>10.0<\/td>6.5<\/td>4.5<\/td>3.5<\/td>3.0<\/td>2.5<\/td>\u2026<\/td>2.0<\/td><\/tr>
30<\/td>11.5<\/td>7.5<\/td>5.0<\/td>4.0<\/td>3.5<\/td>2.5<\/td>\u2026<\/td>2.0<\/td><\/tr>
20<\/td>13.0<\/td>9.0<\/td>6.0<\/td>4.5<\/td>3.5<\/td>3.0<\/td>\u2026<\/td>2.0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente: ASM Handbook, Vol. 8, factores de correcci\u00f3n para piezas cil\u00edndricas ensayadas con dur\u00f3metros Rockwell superficiales. La columna de 22,225 mm est\u00e1 en blanco para las escalas 15T, 30T y 45T en la tabla de origen.<\/em><\/p>\n\n\n\n

Qu\u00e9 valor tiene la correcci\u00f3n en la pr\u00e1ctica<\/h2>\n\n\n\n

En una barra de 6,35 mm, una lectura de 60 HRC conlleva una correcci\u00f3n de 1,5 puntos y una lectura de 30 HRC conlleva 5,0 puntos. A la dureza a la que se usa el acero para herramientas, la correcci\u00f3n es peque\u00f1a, pero es mayor que la repetibilidad del ensayo, por lo que decide si una barra queda dentro de una banda de aceptaci\u00f3n estrecha.<\/p>\n\n\n\n

Un certificado que indica 58,5 HRC en una barra redonda sin indicar el di\u00e1metro no puede compararse con el resultado de una probeta plana. Indique el di\u00e1metro, la escala y la carga, y se\u00f1ale si se ha aplicado la correcci\u00f3n.<\/p>\n\n\n\n

La misma tabla cubre el tubo, donde el di\u00e1metro interior es una superficie c\u00f3ncava, y el alambre, donde la lectura cae por debajo del rango de las escalas regulares. Por debajo de 6,35 mm de di\u00e1metro las escalas regulares quedan descartadas, y las escalas N superficiales llevan la correcci\u00f3n hasta 3,175 mm.<\/p>\n\n\n\n

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

Una lectura de dureza pertenece a una escala, una carga y una geometr\u00eda de pieza. Comparar un valor tomado sobre una superficie curva con una probeta plana, o un valor superficial con un valor de escala C, produce una discrepancia que no tiene nada que ver con el material.<\/p>\n\n\n\n

Los factores de esta p\u00e1gina son datos de referencia publicados y son aproximados por construcci\u00f3n. Confirme los criterios de aceptaci\u00f3n con la norma que rige su propio producto, e indique la escala, la carga, la ubicaci\u00f3n y el di\u00e1metro de la pieza en el certificado.<\/p>\n\n\n\n

P\u00e1ginas de referencia relacionadas en este sitio: Espesor m\u00ednimo para el ensayo de dureza<\/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, Volumen 8, Mechanical Testing and Evaluation (ASM International), art\u00edculo Selection and Industrial Applications of Hardness Tests de Andrew Fee, Consultor, y art\u00edculo Macroindentation Hardness Testing de Edward L. Tobolski, Wilson Instruments Division, Instron Corporation y 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":"

Hardness Test Correction Factors for Round Bar A hardness reading taken on a round bar is not the same value as a reading taken on flat stock of the same material. This page carries the published correction factors for cylindrical workpieces on the Rockwell scales, with the diameter limits that decide when a correction is 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Aobo Steel<\/title>\n<meta name=\"description\" content=\"Correction factors that convert Rockwell hardness readings taken on round bar and tube into flat surface values, on the HRC, HRA, B and superficial N and T scales.\" \/>\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\/hardness-test-correction-factors-round-bar\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hardness Test Correction Factors for Round Bar\" \/>\n<meta property=\"og:description\" content=\"Correction factors that convert Rockwell hardness readings taken on round bar and tube into flat surface values, on the HRC, HRA, B and superficial N and T scales.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/es\/hardness-test-correction-factors-round-bar\/\" \/>\n<meta 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