Hardness equivalents

Comparative table of approximate hardness values

Vickers Hardness Number	Brinell Hardness Number	Rockwell Hardness Number		Rockwell Superficial Hardness Number
		B Scale	C Scale	15-T scale	30-T scale	45-T Scale
Vickers Indenter 1, 5, 10, 30-kgf	10-mm Standard Ball, 3000-kgf	100-kgf, 1/16″ (1,588 mm) Ball	150-kgf Diamond Pene- trator	15-kgf, 1/16″ (1,588 mm) Ball	30-kgf, 1/16″ (1,588 mm) Ball	45-kgf, 1/16″ (1,588 mm) Ball
HV	HBS	HRB	HRC	HR 15-T	HR 30-T	HR 45-T
513	479		50,0
481	450		48,0
452	425		46,0
427	403		44,0
404	382		42,0
382	363		40,0
362	346		38,0
344	329		36,0
326	313		34,0
309	298	106	32,0	94,5	85,5	77,0
285	275	104	28,5	94,0	84,5	75,0
266	258	102	25,5	93,0	83,0	73,0
248	241	100	22,5	92,5	81,5	71,0
234	228	98	20,0	92,0	80,5	69,0
220	215	96	17,0	91,0	79,0	67,0
209	204	94	14,5	90,5	77,5	65,0
198	194	92	12,0	89,5	76,0	63,0
188	184	90	9,0	89,0	75,0	61,0
179	176	88	6,5	88,0	73,5	59,5
171	168	86	4,0	87,5	72,0	57,5
164	161	84	2,0	87,0	70,5	55,5
157	155	82		86,0	69,5	53,5
151	149	80		85,5	68,0	51,5
145	144	78		84,5	66,5	49,5
140	139	76		84,0	65,5	47,5
135	134	74		83,0	64,0	45,5
130	129	72		82,5	62,5	43,5
126	125	70		82,0	61,0	41,5
122	121	68		81,0	60,0	39,5
119	118	66		80,5	58,5	37,5
115	114	64		79,5	57,0	35,5
112	111	62		79,0	56,0	33,5
108	108	60		78,5	54,5	31,5
106	106	58		77,5	53,0	29,5
103	103	56		77,0	51,5	27,5
100	100	54		76,0	50,5	25,5
98	98	52		75,5	49,0	23,5
95	95	50		74,5	47,5	21,5