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Hardness conversion HRC – HV – HB

Enter a hardness value on one scale to convert it to the others.

HRC
HV
HB (HBW)
Tensile strength (estimate)

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  • Per ASTM E140 for non-austenitic steels (carbon, alloy and tool steels); intermediate values are linearly interpolated. HB uses a 10 mm carbide ball at 3000 kgf. Not valid for austenitic stainless (304 etc.), cast iron or non-ferrous metals. Tensile strength ≈ 3.45 × HB, an estimate only.

Steel hardness conversion chart (ASTM E140)

Per ASTM E140 for non-austenitic steels (carbon, alloy and tool steels); intermediate values are linearly interpolated. HB uses a 10 mm carbide ball at 3000 kgf. Not valid for austenitic stainless (304 etc.), cast iron or non-ferrous metals. Tensile strength ≈ 3.45 × HB, an estimate only.

HRCHVHB (HBW)Est. tensile strength (MPa)
68940——
67900——
66865——
65832739≈ 2,550
64800722≈ 2,490
63772705≈ 2,430
62746688≈ 2,375
61720670≈ 2,310
60697654≈ 2,255
59674634≈ 2,185
58653615≈ 2,120
57633595≈ 2,055
56613577≈ 1,990
55595560≈ 1,930
54577543≈ 1,875
53560525≈ 1,810
52544512≈ 1,765
51528496≈ 1,710
50513481≈ 1,660
49498469≈ 1,620
48484455≈ 1,570
47471443≈ 1,530
46458432≈ 1,490
45446421≈ 1,450
44434409≈ 1,410
43423400≈ 1,380
42412390≈ 1,345
41402381≈ 1,315
40392371≈ 1,280
39382362≈ 1,250
38372353≈ 1,220
37363344≈ 1,185
36354336≈ 1,160
35345327≈ 1,130
34336319≈ 1,100
33327311≈ 1,075
32318301≈ 1,040
31310294≈ 1,015
30302286≈ 985
29294279≈ 965
28286271≈ 935
27279264≈ 910
26272258≈ 890
25266253≈ 875
24260247≈ 850
23254243≈ 840
22248237≈ 820
21243231≈ 795
20238226≈ 780
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