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Old 05-15-2006, 15:09   #90
Bill Harsey
Bladesmith to the Quiet Professionals
 
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Join Date: Feb 2004
Location: Oregon, Land of the Silver Grey Sunsets
Posts: 3,886
Quote:
Originally Posted by Maytime
IIRC, hardness is tested with a small diamond punch and a machine that applies a given force, so afterwards you measure the depth of the protrusion (with a computer?). From there hardness is referenced in a big book of numbers or I suppose the computer can just tell you. Mr. Harsey can elaborate or correct me; he knows volumes more than I.
Maytime, You have already answered this correctly and I have already explained it further in the preceding text. We don't use computers in our Rockwell testers but just an old fashioned caveman analog dial.

Hardness is not the only characteristic which explains edge holding of which abrasion resistance is also a component.
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