Gordon England Surface Engineering Forum

HARDNESS CONVERSION TABLE

Approximate Equivalents of Rockwell C Hardness Numbers
for Hard Materials

VICKERS DPH	ROCKWELL						BRINELL BHN	SCLERO- SCOPE	U.T.S.
HV/10	A	C	D	15-N	30-N	45-N	3000kg		Kpsi	MPa
1865	92	80	87	97	92	87
1787	92	79	86	96	92	87
1710	91	78	85	96	91	86
1633	91	77	84	96	91	85
1556	90	76	83	96	90	84
1478	90	75	83	95	89	83
1400	89	74	82	95	89	82
1323	89	73	81	95	88	81
1245	88	72	80	95	87	80
1160	87	71	80	94	87	79
1076	87	70	79	94	86	78		101
1004	86	69	78	94	85	77		99
940	86	68	77	93	84	75		97
900	85	67	76	93	84	74		95
865	85	66	75	93	83	73		92
832	84	65	75	92	82	72	739	91
800	84	64	74	92	81	71	722	88
772	83	63	73	91	80	70	705	87
746	83	62	72	91	79	69	688	85
720	82	61	72	91	79	68	670	83
697	81	60	71	90	78	67	654	81	320	2206
674	81	59	70	90	77	66	634	80	310	2137
653	80	58	69	89	76	64	615	78	300	2068
633	80	57	69	89	75	63	595	76	290	1999
613	79	56	68	88	74	62	577	75	282	1944
595	79	55	67	88	73	61	560	74	274	1889
577	78	54	66	87	72	60	543	72	266	1834
560	78	53	65	87	71	59	523	71	257	1772
544	77	52	65	86	70	57	512	69	245	1689
528	77	51	64	86	69	56	496	68	239	1648
513	76	50	63	86	69	55	481	67	233	1606
498	75	49	62	85	68	54	469	66	227	1565
484	75	48	61	85	67	53	455	64	221	1524
471	74	47	61	84	66	51	443	63	217	1496
458	74	46	60	84	65	50	432	62	212	1462
446	73	45	59	83	64	49	421	60	206	1420
434	73	44	59	83	63	48	409	58	200	1379
423	72	43	58	82	62	47	400	57	196	1351
412	72	42	57	82	61	46	390	56	191	1317
402	71	41	56	81	60	44	381	55	187	1289
392	71	40	55	80	60	43	371	54	182	1255
382	70	39	55	80	59	42	362	52	177	1220
372	70	38	54	79	58	41	353	51	173	1193
363	69	37	53	79	57	40	344	50	169	1165
354	69	36	52	78	56	38	336	49	165	1138
345	68	35	52	78	55	37	327	48	160	1103
336	68	34	51	77	54	36	319	47	156	1076
327	67	33	50	77	53	35	311	46	152	1048
318	67	32	49	76	52	34	301	44	147	1014
310	66	31	48	76	51	33	294	43	144	993
302	66	30	48	75	50	31	286	42	140	965
294	65	29	47	75	50	30	279	41	137	945
286	65	28	46	74	49	29	271	41	133	917
279	64	27	45	73	48	28	264	40	129	889
272	64	26	45	73	47	27	258	39	126	869
266	63	25	44	72	46	26	253	38	124	855
260	63	24	43	72	45	24	247	37	121	834
254	62	23	42	71	44	23	240	36	118	814
248	62	22	42	71	43	22	234	35	115	793
243	61	21	41	70	42	21	228	35	112	772
238	61	20	40	69	42	20	222	34	109	752
HV/10	A	C	D	15-N	30-N	45-N	3000kg		Kpsi	MPa
VICKERS DPH	ROCKWELL						BRINELL BHN	SCLERO- SCOPE	U.T.S.

Approximate Equivalents of Rockwell C Hardness Numbers for Hard Materials

Hardness Conversion or Equivalents:

Hardness conversion between different methods and scales cannot be made mathematically exact for a wide range of materials. Different loads, different shape of indenters, homogeneity of specimen, cold working properties and elastic properties all complicate the problem. All tables and charts should be considered as giving approximate equivalents, particularly when converting to a method or scale which is not physically possible for the particular test material and thus cannot be verified. An example would be converting HV/10 or HR-15N value on a thin coating to the HRC equivalent.

Hardness Conversion Tables and Charts:

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HARDNESS CONVERSION TABLE

Approximate Equivalents of Rockwell C Hardness Numbers for Hard Materials

Approximate Equivalents of Rockwell C Hardness Numbers for Hard Materials

Hardness Conversion or Equivalents:

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Hardness Conversion Tables and Charts:

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Approximate Equivalents of Rockwell C Hardness Numbers
for Hard Materials