Abstract
A new, simplified procedure for converting Rockwell hardness numbers between the normal and superficial scales has been developed. The method, based on a reverse Meyer analysis, essentially computes the hardness from the stress-strain curve of the alloy. The analysis is based on the concept of the Rockwell hardness as the intersection of a generic loading curve representing the process and a material flow curve. The model was applied to both normal and superficial Rockwell scales and yielded Rockwell conversions for aluminum alloys, cartridge brass and steel in good agreement with published values. The use of this technique also simplifies the selection of appropriate Rockwell scales for conventional hardness tests.
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