Stainless, Nickel Alloys, Forgings & Tungsten Alloys

HARDNESS CONVERSION TABLE FOR CARBON & ALLOY STEELS All values are approximate

Brinell Hardness Number (Carbide ball)	Rockwell Hardness Numbers					Tensile Strength
Brinell Hardness Number (Carbide ball)	C Scale	A Scale	15N Scale Superficial	B Scale	30T Scale Superficial	1000 Lb/Sq In	kgf/mm
-	66	84.5	92.5	-	-	-	-
722	64	83.4	91.8	-	-	-	-
688	62	82.3	91.1	-	-	-	-
654	60	81.2	90.2	-	-	-	-
615	58	80.1	89.3	-	-	-	-
577	56	79.0	88.3	-	-	313	220
543	54	78.0	87.4	-	-	292	205
512	52	76.8	86.4	-	-	273	192
481	50	75.9	85.5	-	-	255	179
455	48	74.7	84.5	-	-	237	167
443	47	74.1	83.9	-	-	229	161
432	46	73.6	83.5	-	-	222	156
421	45	73.1	83.0	-	-	215	151
409	44	72.5	82.5	-	-	208	146
400	43	72.0	82.0	-	-	201	141
390	42	71.5	81.5	-	-	194	136
381	41	70.9	80.9	-	-	188	132
371	40	70.4	80.4	-	-	181	127
362	39	69.9	79.9	-	-	176	124
353	38	69.4	79.4	-	-	171	120
344	37	68.9	78.8	-	-	167	117
336	36	68.4	78.3	-	-	162	114
327	35	67.9	77.7	-	-	157	110
319	34	67.4	77.2	-	-	153	108
311	33	66.8	76.6	-	-	149	105
301	32	66.3	76.1	-	-	145	102
294	31	65.8	75.6	-	-	142	100
286	30	65.3	75.0	-	-	138	97
279	29	64.7	74.5	-	-	135	95
271	28	64.3	73.9	-	-	132	93
264	27	63.8	73.3	-	-	128	90
258	26	63.3	72.8	-	-	125	88
253	25	62.8	72.2	-	-	122	86
247	24	62.4	71.6	-	-	120	84
243	23	62.0	71.0	-	-	117	82
240	-	-	-	100	82.0	116	82
234	-	-	-	99	81.5	112	79
222	-	-	-	97	80.5	106	75
210	-	-	-	95	79.0	101	71
200	-	-	-	93	78.0	96	67
195	-	-	-	92	77.5	93	65
185	-	-	-	90	76.0	89	63
176	-	-	-	88	75.0	85	60
169	-	-	-	86	74.0	81	57
162	-	-	-	84	73.0	78	55
156	-	-	-	82	71.5	75	53
150	-	-	-	80	70.0	72	51
144	-	-	-	78	69.0	-	-
139	-	-	-	76	67.5	-	-
135	-	-	-	74	66.0	-	-
130	-	-	-	72	65.0	-	-
125	-	-	-	70	63.5	-	-
121	-	-	-	68	62.0	-	-
117	-	-	-	66	60.5	-	-
114	-	-	-	64	59.5	-	-