Hardness
nHardness measures the capacity of a material to resist deformation
nBrinell: A
hardened steel ball is pressed into the surface
of a test specimen
nthe resulting diameter of the impression determines the Brinell Hardness Number (BHN)
nby the way Sut ~= 500*BHN
nRockwell: The
depth of the indentation is measured
nOn both Rockwell and Brinell numbers, be sure and note testing material and testing
standards, i.e., diameter of ball
and material being tested