Rockwell Hardness
Posted on 01/01/2019 Category:
A standard method for measuring the hardness of metals. The hardness is expressed as a number related to the depth of residual penetration of a steel ball or diamond cone (“brale”) after a minor load of 10 kilograms has been applied to hold the penetrator in position. This residual penetration is automatically registered on a dial when the major load s removed from the penetrator. Various dial readings combined with different major loads, give “scales” designated by letters varying from “A” to “H” the “B” and “C” scales are most commonly in use.
