1999BS EN ISO 6508-1:1999 Metallic materials - Rockwell hardness test - Test method (scales A, B, C, D, E, F, G, H, K, N, T)
1996BS EN 10109-1:1996 Metallic Materials - Hardness Test - Part 1: Rockwell Test (Scales A, B, C, D, E, F, G, H, K) and Rockwell Superficial Test (Scales 15N, 30N, 45N, 15T, 30T and 45T)