BS 4175 1989 Edition, July 31, 1989
Methods for Superficial Hardness Test (Rockwell Method) and for Verification of Superficial Hardness Testing Machines (Rockwell Method)
Additional Comments: W/D S/S BY BS EN 10109-1, -2 & -3
Published By:British Standards Institution (BSI)
Method of test for metals at room temperature. Also, methods for direct and indirect verification of the accuracy of a testing machine.