The Rockwell C Hardness system uses "HRC" as a measure of hardness for various materials. A hardness of 68 HRC is extremely high and will most likely be harder than simple steel.
28 - 32 hrc
42 to 45 HRC
It can range from 10 HRc to 50 HRc it's all dependent on how it's heat treated and quenched.
approx. 50 HRC after hardening and tempering
EN31 is steel that has a hardness measurement of 63HRC. The Brinell-Rockwell hardness of the material ranges from 59 to 65.
55-58 HRC (Rockwell Hardness) typically indicates a high level of hardness and wear resistance in metals or materials. It signifies that the material has been heat-treated to achieve this level of hardness, making it suitable for applications requiring durability and strength, such as cutting tools or industrial components.
13-16 hrc
Hardness Conversion TableTensileStrength(N/mm2)Brinell Hardness(BHN)Vickers Hardness(HV)RockwellHardness(HRB)Rockwell Hardness(HRC)28586903209510056.235010511062.338511412066.741512413071.245013314075.048014315078.751015216081.754516217085.057517118087.161018119089.564019020091.567519921093.570520922095.074021923096.777022824098.180023825099.582024225523.185025226524.888026127526.490026628027.193027629028.595028029529.299529531031.0103030432032.2106031433033.3109532334034.4112533335035.5115534236036.6119035237037.7122036138038.8125537139039.8129038040040.8132039041041.8135039942042.7138540943043.6142041844044.5145542845045.3148543746046.1152044747046.9155545648047.7159546649048.4163047550049.1166548551049.8170049452050.5174050453051.1177551354051.7181052355052.3184553256053.0188054257053.6192055158054.1195556159054.7199557060055.2203058061055.7207058962056.3210559963056.8214560864057.3218061865057.8
approximately 90 HRC
28 - 32 hrc
hra
42 to 45 HRC
8.75 g/cm3
The full form of HRC is Rockwell Hardness C Scale. It is a measure of the hardness of a material, typically metals, determined by how much force is required to create an indentation on the surface of the material.
It can range from 10 HRc to 50 HRc it's all dependent on how it's heat treated and quenched.
approx. 50 HRC after hardening and tempering
The hardness of UST-36 steel is usually around 197-235 HB (Brinell hardness) or 20-23 HRC (Rockwell hardness).