Hardness Comparison

Name: EICAC
Address: 11 Blofield Corner Road, Blofield Heath, Norwich, Norfolk, NR13 4SA, United Kingdom
Telephone: +447847300332
Price range: £10 - £100

The chart below gives a hardness comparison between Rockwell 'A' , Rockwell 'B', Rockwell 'C' and Brinell numbers along with an approximate Tensile Strength values.

HARDNESS COMPARISON CHART

Rockwell Scale 'C'	Rockwell Scale 'A'	Rockwell Scale 'B'	Diamond Pyramid Scale HV10 HV30	Brinell			Tensile Stress Equivalents				Scleroscope Hardness Number
Rockwell Scale 'C'	Rockwell Scale 'A'	Rockwell Scale 'B'	Diamond Pyramid Scale HV10 HV30	Diameter Imp. 10mm Ball	Carbide Ball	Standard Ball	Tons/in²	1000lb/in²	kg/mm²	MPa (N/mm²)	Scleroscope Hardness Number
67.7	85.6		900								96
67	85		880								95
66.3	84.7		860								93
65.5	84.2		840								92
64.8	83.8		820								90
64	83.4		800								88
63.3	83		780								87
62.5	82.6		760								86
61.7	82.2		740								84
61	81.8		725	2.44	630	-	-	-	-	-	82
60.5	81.5		710	2.45	627	-	-	-	-	-
60	81.2		698	2.5	601	-	132	295	208	2039	81
58.9	80.6		670	2.55	578	-	127	284	200	1961	78
57.1	79.6		630	2.6	555	-	122	273	192	1884	75
56.1	79		609	2.65	534	-	117	262	184	1807	73
54.4	78.2		572	2.7	514	-	112	250	176	1729	71
51.9	76.9		532	2.75	495	495	108	241	170	1668	68
50.7	76.3		517	2.8	477	477	105	235	165	1621	66
49.5	75.5		497	2.85	461	461	101	226	160	1559	64
47.5	74.2		470	2.9	444	444	98	219	155	1513	62
46	73.5		452	2.95	429	429	95	212	150	1467	60
44.8	73		437	3	415	415	92	206	145	1420	58
43.7	72.5		422	3.05	401	401	88	197	139	1359	56
42.4	71.5		408	3.1	388	388	85	190	134	1312	54
41.3	71		395	3.15	375	375	82	183	129	1266	52
39.9	70.3		381	3.2	363	363	80	179	126	1235	51
38.8	69.8		370	3.25	352	352	77	172	121	1189	49
37.7	69.2		359	3.3	341	341	75	168	118	1158	48
36.7	68.8		349	3.35	331	331	73	163	114	1127	46
35	68		337	3.4	321	321	71	159	111	1096	45
34	67.5		327	3.45	311	311	68	152	107	1050	43
33	66.8		318	3.5	302	302	66	147	104	1019	42
32	66.2		308	3.55	293	293	64	143	101	988	41
30.9	65.7		300	3.6	285	285	63	141	99	973	40
29.8	65.2		292	3.65	277	277	61	136	96	942	38
29	64.6		284	3.7	269	269	59	132	93	911	37
27.5	64		275	3.75	262	262	58	130	91	895	36
26.6	63.6		269	3.8	255	255	56	125	89	865	35
25.2	62.9		261	3.85	248	248	55	123	87	849	34
24.3	62.6		255	3.9	241	241	53	118	84	818	33
23	62		247	3.95	235	235	51	114	81	787	32
22	61.6		241	4	229	229	50	112	79	772	31
20.8	60.7		234	4.05	223	223	49	110	77	756	30
-	-		228	4.1	217	217	48	107	76	741	-
		98	222	4.15	212	212	46	103	73	710	29
		97	218	4.2	207	207	45	101	71	695	28
		96	212	4.3	197	197	43	97	68	664	27
		93	196	4.4	187	187	41	92	65	632	25
		91	188	4.5	179	179	39	88	62	602	-
		88.5	178	4.6	170	170	36	81	57	556	24
		86	171	4.7	163	163	35	78	55	540	-
		84.2	163	4.8	156	156	34	76	54	525	23
		82	156	4.9	149	149	32	72	51	494	-
		80	150	5	143	143	31	69	49	479	22
		77	143	5.1	137	137	30	67	48	463	21
		75	137	5.2	131	131	29.5	66	47	455	20.5
		72.5	132	5.3	126	126	29	65	46	448	20
		70	127	5.4	121	121	28	63	44	432	-
		67	122	5.5	116	116	26	58	42	401	15

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