Surface Rockwell hardness test minimum thickness

- Jan 15, 2019-

What is the minimum thickness of the surface Rockwell hardness test? 

Answer: Surface Rockwell hardness test minimum thickness (N scale) Minimum thickness mm Surface Rockwell hardness (N scale) HR15N HR30N HR45N 0.1524 92 0.2032 90 0.2540 88 0.3048 83 82 77 0.3556 76 80 74 0.4064 68 74 72 0.4672 66 68 0.5180 57 63 0.5688 47 58 0.6196 51 0.6704 37 0.7212 20 Hardness Tester Article Go to: Hardness Tester Forum Surface Rockwell Hardness Test Minimum Thickness (T Ruler)