Empire Metal - Hardness Conversion Table

Conversion Tables

Hardness Conversion Table

Hardness Conversion Table
Brinell		Rockwell
Dia. in MM 3000 KG. load 10 MM Ball	Hardness No.	C Scale 150KG. Load, 120 Deg. Diamond Cone	B Scale 100 KG. Load, 1/16" Diam. Ball
2.20	780	70	-
2.25	745	68	-
2.30	712	66	-
2.35	682	64	-
2.40	653	62	-
2.45	627	60	-
2.50	601	58	-
2.55	578	57	-
2.60	555	55	-
2.65	534	53	-
2.70	514	52	-
2.75	495	50	-
2.80	477	49	-
2.85	461	47	-
2.90	444	46	-
2.95	429	45	-
3.00	415	44	-
3.05	401	42	-
3.10	388	41	-
3.15	375	40	-
3.20	363	38	-
3.25	352	37	-
3.30	341	36	-
3.35	331	35	-
3.40	321	34	-
3.45	311	33	-
3.50	302	32	-
3.55	293	31	-
3.60	285	30	-
3.65	277	29	-
3.70	269	28	-
3.75	262	26	-
3.80	255	25	-
3.85	248	24	-
3.90	241	23	100
3.95	235	22	99
4.00	229	21	98
4.05	223	20	97
4.10	217	-	96
4.15	212	-	96
4.20	207	-	95
4.25	202	-	94
4.30	197	-	93
4.35	192	-	92
4.40	187	-	91
4.45	183	-	90
4.50	179	-	89
4.55	174	-	88
4.60	170	-	87
4.65	166	-	86
4.70	163	-	85
4.75	159	-	84
4.80	156	-	83
4.85	153	-	82
4.90	149	-	81
4.95	146	-	80
5.00	143	-	79
5.05	140	-	78
5.10	137	-	77
5.15	134	-	76
5.20	131	-	74
5.25	128	-	73
5.30	126	-	72
5.35	124	-	71
5.40	121	-	70
5.45	118	-	69
5.50	116	-	68
5.55	114	-	67
5.60	112	-	66
5.65	109	-	65
5.70	107	-	64
5.75	105	-	62
5.80	103	-	61
5.85	101	-	60
5.90	99	-	59
5.95	97	-	57
6.00	95	-	56
* Developed by the Iron and Steel Division of the Society of Automotive Engineers. NOTE: Conversion values vary with variation in composition. These values should, therefore, be considered approximate.