Hardness comparison table,Approximate converted value of Brinell hardness of steelManufacturer for CBN PCD carbide inserts tools ceramics tools Mintek Abrasives & T

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Hardness comparison table,Approximate converted value of Brinell hardness of steel

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Oct 24, 2023
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Hardness comparison table
Approximate converted value of Brinell hardness of steel

Brinell hardness(HB) 10mm 3000kgf		Vickers hardness (HV)	Rockwell hardness (3)				Shore Hardness (HS)	Tensile strength (approximation) MPa(2)
Standard ball	Tungsten carbide ball	Vickers hardness (HV)	Rockwell hardness A Load 60kgf Diamond cone indenter (HRA)	Rockwell hardness B Load 100kgf Steel ball Ø1.6mm (1/16in) (HRB)	Rockwell hardness C Load 100kgf Diamond cone indenter (HRC)	Rockwell hardness D Load 150kgf Diamond cone indenter (HRD)	Shore Hardness (HS)	Tensile strength (approximation) MPa(2)
-	-	940	85.6	-	68.0	76.9	97	-
-	-	920	85.3	-	67.5	76.5	96	-
-	-	900	85.0	-	67.0	76.1	95	-
-	(767)	880	84.7	-	66.4	75.7	93	-
-	(757)	860	84.4	-	65.9	75.3	92	-

-	(745)	840	84.1	-	65.3	74.8	91	-
-	(733)	820	83.8	-	64.7	74.3	90	-
-	(722)	800	83.4	-	64.0	73.8	88	-
-	(712)	-	-	-	-	-	-	-
-	(710)	780	83.0	-	63.3	73.3	87	-
-	(698)	760	82.6	-	62.5	72.6	86	-

-	(684)	740	82.2	-	61.8	72.1	-	-
-	(682)	737	82.2	-	61.7	72.0	84	-
-	(670)	720	81.8	-	61.0	71.5	83	-
-	(656)	700	81.3	-	60.1	70.8	-	-
-	(653)	697	81.2	-	60.0	70.7	81	-

-	(647)	690	81.1	-	59.7	70.5	-	-
-	(638)	680	80.8	-	59.2	70.1	80	-
-	630	670	80.6	-	58.8	69.8	-	-
-	627	667	80.5	-	58.7	69.7	79	-

-	-	677	80.7	-	59.1	70.0	-	-
-	601	640	79.8	-	57.3	68.7	77	-

-	-	640	79.8	-	57.3	68.7	-	-
-	578	615	79.1	-	56.0	67.7	75	-

-	-	607	78.8	-	55.6	67.4	-	-
-	555	591	78.4	-	54.7	66.7	73	2055

-	-	579	78.0	-	54.0	66.1	-	2015
-	534	569	77.8	-	53.5	65.8	71	1985

-	-	533	77.1	-	52.5	65.0	-	1915
-	514	547	76.9	-	52.1	64.7	70	1890

(495)	-	539	76.7	-	51.6	64.3	-	1855
-	-	530	76.4	-	51.1	63.9	-	1825
-	495	528	76.3	-	51.0	63.8	68	1820

(477)	-	516	75.9	-	50.3	63.2	-	1780
-	-	508	75.6	-	49.6	62.7	-	1740
-	477	508	75.6	-	49.6	62.7	66	1740

(461)	-	495	75.1	-	48.8	61.9	-	1680
-	-	491	74.9	-	48.5	61.7	-	1670
-	461	491	74.9	-	48.5	61.7	65	1670

444	-	474	74.3	-	47.2	61.0	-	1595
-	-	472	74.2	-	47.1	60.8	-	1585
-	444	472	74.2	-	47.1	60.8	63	1585

429	429	455	73.4	-	45.7	59.7	61	1510
415	415	440	72.8	-	44.5	58.8	59	1460
401	401	425	72.0	-	43.1	57.8	58	1390
388	388	410	71.4	-	41.8	56.8	56	1330
375	375	396	70.6	-	40.4	55.7	54	1270

363	363	383	70.0	-	39.1	54.6	52	1220
352	352	372	69.3	(110.0)	37.9	53.8	51	1180
341	341	360	68.7	(109.0)	36.6	52.8	50	1130
331	331	350	68.1	(108.5)	35.5	51.9	48	1095
321	321	339	67.5	(108.0)	34.3	51.0	47	1060

311	311	328	66.9	(107.5)	33.1	50.0	46	1025
302	302	319	66.3	(107.0)	32.1	49.3	45	1005
293	293	309	65.7	(106.0)	30.9	48.3	43	970
285	285	301	65.3	(105.5)	29.9	47.6	-	950
277	277	292	64.6	(104.5)	28.8	46.7	41	925

269	269	284	64.1	(104.0)	27.6	45.9	40	895
262	262	276	63.6	(103.0)	26.6	45.0	39	875
255	255	269	63.0	(102.0)	25.4	44.2	38	850
248	248	261	62.5	(101.0)	24.2	43.2	37	825
241	241	253	61.8	100	22.8	42.0	36	800

235	235	247	61.4	99.0	21.7	41.4	35	785
229	229	241	60.8	98.2	20.5	40.5	34	765
223	223	234	-	97.3	(18.8)	-	-
217	217	228	-	96.4	(17.5)	-	33	725
212	212	222	-	95.5	(16.0)	-	-	705

207	207	218	-	94.6	(15.2)	-	32	690
201	201	212	-	93.8	(13.8)	-	31	675
197	197	207	-	92.8	(12.7)	-	30	655
192	192	202	-	91.9	(11.5)	-	29	640
187	187	196	-	90.7	(10.0)	-	-	620

183	183	192	-	90.0	(9.0)	-	28	615
179	179	188	-	89.0	(8.0)	-	27	600
174	174	182	-	87.8	(6.4)	-	-	585
170	170	178	-	86.8	(5.4)	-	26	570
167	167	175	-	86.0	(4.4)	-	-	560

163	163	171	-	85.0	(3.3)	-	25	545
156	156	163	-	82.9	(0.9)	-	-	525
149	149	156	-	80.8	-	-	23	505
143	143	150	-	78.7	-	-	22	490
137	137	143	-	76.4	-	-	21	460

131	131	137	-	74.0	-	-	-	450
126	126	132	-	72.0	-	-	20	435
121	121	127	-	69.8	-	-	19	415
116	116	122	-	67.6	-	-	18	400
111	111	117	-	65.7	-	-	15	385

Metal hardness：
The so-called hardness is generally understood as the ability of the local volume of the metal surface to resist plastic deformation caused by external force pressing.

1、Brinell hardness:
With the force of load P, press the steel ball of diameter D into the metal surface and hold it for a fixed time, then take out the load, measure the diameter d of the circular indentation pressed by the steel ball on the metal surface, and calculate the pressure accordingly The trace area AB is the force per unit area P/AB, which is used as the hardness value of the metal and is called the Brinell hardness.

The upper limit of Brinell hardness generally does not exceed HB450.

2、Rockwell hardness:
The principle of Rockwell hardness is the same as Brinell hardness, and it is also an indentation test method. The difference is that it does not measure the size of the indentation, but measures the depth of the indentation to indicate the hardness value.

3、Shore hardness:
Shore hardness is the hardness of a certain shape and quality of the free fall from the standard height to the surface to be tested, and then the rebound height after the dents remain on the surface to determine the time. Due to the difference in the shape, weight and free fall height of the punch, the Shore hardness tester is divided into C type and D type.

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