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.
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
13-16 hrc
approximately 90 HRC
28 - 32 hrc
hra
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.
42 to 45 HRC
8.75 g/cm3
It can range from 10 HRc to 50 HRc it's all dependent on how it's heat treated and quenched.
The hardness of 50-55 HRC (Rockwell C scale) indicates the material's resistance to deformation and wear, commonly used to assess the hardness of steel and other hard materials. A hardness value in this range suggests that the material is quite hard and suitable for applications requiring durability, such as cutting tools and industrial components. This level of hardness typically implies a balance between hardness and toughness, allowing the material to withstand stress without fracturing.
The HRC value for aluminum typically ranges from 15 to 25. This value represents the hardness of the aluminum alloy, with higher values indicating a harder material. HRC values can vary depending on the specific alloy and heat treatment of the aluminum.