G R STEEL

Hardness Conversion Table

Cold Rolled Medium & High Carbon Steel Strips

Vickers	Rockwell	Rockwell
Hardness	Hardness	Hardness	Tensile Strength	Tensile Strength
HV/VPN	HRB	HRC	N/mm²	kgf/mm²
319	107	32	1020	104
309	106	31	990	101
301	105	30	971	99
292	104	29	941	96
284	104	27.5	912	93
276	103	26.5	892	91
269	102	25.5	873	89
261	102	24	853	87
253	100	23	824	84
247	99	22	794	81
241	98	20.5	775	79
235	97		755	77
228	96		745	76
223	96		716	73
218	95		696	71
208	93		667	68
197	91		637	65
189	89		608	62
179	87		559	57
172	85		539	55
165	83		530	54
157	81		500	51
150	79		481	49
144	77		481	49

Hardened & Tempered Spring Steel Strips

Vickers	Rockwell	Rockwell
Hardness	Hardness	Hardness	Tensile Strength	Tensile Strength
HV/VPN	HRB	HRC	N/mm²	kgf/mm²
591	120	54.5	1940	198
569	119	53.5	1880	192
547	119	52	1792	183
528	117	51	1740	177
508	117	49.5	1655	169
491	116	48.5	1595	1963
474	115	47	1520	155
455	155	45.5	1471	150
440	114	44.5	1422	145
425	113	43	1363	139
410	112	42	1314	134
396	112	40.5	1265	129
383	110	39	1236	126
371	110	38	1187	121
360	109	36.5	1363	139
425	113	43	1157	118
350	109	35.5	1118	114
339	108	34.5	1118	114
328	108	33	1049	107
319	107	32	1020	104
309	106	31	990	101

Cold Rolled Medium & High Carbon Steel Strips

Vickers	Rockwell	Rockwell
Hardness	Hardness	Hardness	Tensile Strength	Tensile Strength
HV/VPN	HRB	HRC	N/mm²	kgf/mm²
319	107	32	1020	104
309	106	31	990	101
301	105	30	971	99
292	104	29	941	96
284	104	27.5	912	93
276	103	26.5	892	91
269	102	25.5	873	89
261	102	24	853	87
253	100	23	824	84
247	99	22	794	81
241	98	20.5	775	79
235	97		755	77
228	96		745	76
223	96		716	73
218	95		696	71
208	93		667	68
197	91		637	65
189	89		608	62
179	87		559	57
172	85		539	55
165	83		530	54
157	81		500	51
150	79		481	49
144	77		481	49