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HARDNESS COMPARISON TABLE

HARDNESS CONVERSION NUMBERS OF STEEL
Brinell Hardness (HB), 
10mm Ball, Load: 3,000kgf
Vickers
Hardness
(HV)
Rockwell Hardness (3)Shore
Hardness
(HS)
Tensile
Strength
(Approx.)
MPa (2)
Standard 
Ball
Tungsten
Carbide
Ball
A Scale, 
Load: 60kgf,
Diamond Point
(HRA)
B Scale,
Load: 100kgf,
1/16" Ball
(HRB)
C Scale,
Load: 150kgf,
Diamond Point
(HRC)
D Scale,
Load: 100kgf,
Diamond Point
(HRD)
94085.668.076.997
92085.367.576.596
90085.067.076.195
(767)88084.766.475.793
(757)86084.465.975.392
(745)84084.165.374.891
(733)82083.864.774.390
(722)80083.464.073.888
(712)
(710)78083.063.373.387
(698)76082.662.572.686
(684)74082.261.872.1
(682)73782.261.772.084
(670)72081.861.071.583
(656)70081.360.170.8
(653)69781.260.070.781
(647)69081.159.770.5
(638)68080.859.270.180
63067080.658.869.8
62766780.558.769.779
67780.759.170.0
60164079.857.368.777
64079.857.368.7
57861579.156.067.775
60778.855.667.4
55559178.454.766.7732055
57978.054.066.12015
53456977.853.565.8711985
53377.152.565.01915
(495)51454776.952.164.7701890
53976.751.664.31855
(477)53076.451.163.91825
49552876.351.063.8681820
(461)51675.950.363.21780
50875.649.662.71740
44447750875.649.662.7661740
49575.148.861.91680
49174.948.561.71670

46149174.948.561.7651670

47474.347.261.01595

47274.247.160.81585

44447274.247.160.8631585
Brinell Hardness (HB), 
10mm Ball, Load: 3,000kgf
Vickers
Hardness
(HV)
Rockwell Hardness (3)Shore
Hardness
(HS)
Tensile
Strength
(Approx.)
MPa (2)
Standard 
Ball
Tungsten
Carbide
Ball
A Scale, 
Load: 60kgf,
Diamond Point
(HRA)
B Scale,
Load: 100kgf,
1/16" Ball
(HRB)
C Scale,
Load: 150kgf,
Diamond Point
(HRC)
D Scale,
Load: 100kgf,
Diamond Point
(HRD)
42942945573.445.759.7611510
41541544072.844.558.8591460
40140142572.043.157.8581390
38838841071.441.856.8561330
37537539670.640.455.7541270
36336338370.039.154.6521220
35235237269.3(110.0)37.953.8511180
34134136068.7(109.0)36.652.8501130
33133135068.1(108.5)35.551.9481095
32132133967.5(108.0)34.351.0471060
31131132866.9(107.5)33.150.0461025
30230231966.3(107.0)32.149.3451005
29329330965.7(106.0)30.948.343970
28528530165.3(105.5)29.947.6950
27727729264.6(104.5)28.846.741925
26926928464.1(104.0)27.645.940895
26226227663.6(103.0)26.645.039875
25525526963.0(102.0)25.444.238850
24824826162.5(101.0)24.243.237825
24124125361.8100.022.842.036800
23523524761.499.021.741.435785
22922924160.898.220.540.534765
22322323497.3(18.8)
21721722896.4(17.5)33725
21221222295.5(16.0)705
20720721894.6(15.2)32690
20120121293.8(13.8)31675
19719720792.8(12.7)30655
19219220291.9(11.5)29640
18718719690.7(10.0)620
18318319290.0(9.0)28615
17917918889.0(8.0)27600
17417418287.8(6.4)585
17017017886.8(5.4)26570
16716717586.0(4.4)560
16316317185.0(3.3)25545
15615616382.9(0.9)525
14914915680.823505
14314315078.722490
13713714376.421460
13113113774.0450
12612613272.020435
12112112769.819415
11611612267.618400
11111111765.715385

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