Hardness

A number of methods are employed including Brinell, Vickers and Rockwell. The steel to be tested is indented by a hardened steel ball or diamond under a given load and the size of the impression is then measured. For steel there is an empirical relationship between hardness and tensile strength and the hardness number is often used as a guide to the tensile strength.

Calibrated using Load Cell and Hardness Block set based on ISO 6508-2:2005 under method clause 5 indirect method.