Historical
BS EN ISO 6508-2:2005
Metallic materials. Rockwell hardness test. Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) (British Standard)
ISO 6508-2:2005 specifies a method of verification of testing machines for determining Rockwell hardness (scales A, B, C, D, E, F, G, H, K, N, T) in accordance with ISO 6508-1.
British Standards Institution [bsi]