Technical Data

Hardness Conversion Chart**

Rockwell “C”Tensile StrengthBrinell (BHN)*
20110,000 PSI226
21112,000 PSI231
22115,000 PSI237
23117,000 PSI243
24119,000 PSI247
25123,000 PSI253
26125,000 PSI258
27128,000 PSI264
28131,000 PSI271
29135,000 PSI279
30138,000 PSI286
31141,000 PSI294
32146,000 PSI301
33149,000 PSI311
34152,000 PSI319
35156,000 PSI327
36161,000 PSI336
37166,000 PSI344
38171,000 PSI353
39177,000 PSI362
Rockwell “C”Tensile StrengthBrinell (BHN)*
40182,000 PSI371
41188,000 PSI381
42194,000 PSI390
43201,000 PSI400
44208,000 PSI409
45215,000 PSI421
46221,000 PSI432
47229,000 PSI442
48238,000 PSI451
49246,000 PSI464
50255,000 PSI475
51264,000 PSI487
52273,000 PSI500
53283,000 PSI
54292,000 PSI
55301,000 PSI
56313,000 PSI
57325,000 PSI
58338,000 PSI
59351,000 PSI

* Values based on Brinell 10mm Standard Ball (3000kgf).

** This conversion calculator gives approximate hardness values for various hardness scales based on the Rockwell “C” Scale. The Hardness Tensile Strength relations may vary according to the processing history or the chemical composition of the steel.