Hardness comparison

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There are a large number of hardness testing methods available (eg. Vickers, Brinell and Rockwell). Although it is impossible in many cases to give an exact conversion it is possible to give a comparison table.

[edit] Hardness Comparison Table

Brinell (10 mm Ball, 3000Kg load)	Vickers (120 Kg)	Rockwell C (120 degree cone 150 Kg)	Rockwell B (1/16" ball 100 Kg)
800	-	72	-
780	1220	71	-
760	1170	70	-
745	1114	68	-
725	1060	67	-
712	1021	66	-
682	940	65	-
668	905	64	-
652	867	63	-
626	803	62	-
614	775	61	-
601	746	60	-
590	727	59	-
576	694	57	-
552	649	56	-
545	639	55	-
529	606	54	-
514	587	53	120
502	565	52	119
495	551	51	119
477	534	49	118
461	502	48	117
451	489	47	117
444	474	46	116
427	460	45	115
415	435	44	115
401	423	43	114
388	401	42	114
375	390	41	113
370	385	40	112
362	380	39	111
351	361	38	111
346	352	37	110
341	344	37	110
331	335	36	109
323	320	35	109
311	312	34	108
301	305	33	107
293	291	32	106
285	285	31	105
276	278	30	105
269	272	29	104
261	261	28	103
258	258	27	102
249	250	25	101
245	246	24	100
240	240	23	99
237	235	23	99
229	226	22	98
224	221	21	97
217	217	20	96
211	213	19	95
206	209	18	94
203	201	17	94
200	199	16	93
196	197	15	92
191	190	14	92
187	186	13	91
185	184	12	91
183	183	11	90
180	177	10	89
175	174	9	88
170	191	7	87
167	168	6	87
165	165	5	86
163	162	4	85
160	159	3	84
156	154	2	83
154	152	1	82
152	150	-	82
150	149	-	81
147	147	-	80
145	146	-	79
143	144	-	79
141	142	-	78
140	141	-	77
135	135	-	75
130	130	-	72
114	120	-	67
105	110	-	62
95	100	-	56
90	95	-	52
81	85	-	41
76	80	-	37

[edit] See also

• Vickers hardness test
• Brinell hardness test
• Rockwell scale