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The requirement to convert from one hardness test scale to another is quite common and is covered by various International Standards ASTM 14012b, ISO 18265. These standards point out that, due to the differences in the various types of hardness test methods, it is impossible to show a constant conversion relationship across all materials.
There are a number of conversion charts according to material type and it is essential to use the correct one.
Equations generated from the specific hardness numbers can be found on: www.asminternational.org
MS001 - Approximate Hardness Conversion Numbers for Non-Austenitic Steels (Rockwell C)
MS002 - Approximate Hardness Conversion Numbers for Non-Austenitic Steels (Rockwell B)
MS003 - Approximate Hardness Conversion Numbers for Nickel and High-Nickel Alloys
MS004 - Approximate Hardness Conversion Numbers for Brass 70% Copper 30%
MS005 - Approximate Hardness Conversion Numbers for Brinell-Rockwell B
MS006 - Approximate Rockwell Hardness Conversion Numbers for Austenitic Stainless Steel (Rockwell B)
MS007 - Approximate Hardness Conversion Numbers for Copper No102 to 142 Inclusive
MS008 - Approximate Hardness Conversion Numbers for Wrought Aluminum Products and Alloyed White Irons
MS009 - Approximate Leeb Type D Hardness Conversion
Ref. Microstar2000.com
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