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Jim Watson · January 30, 2018, 01:25 PM

For surface hardened parts, there is a specific Rockwell Superficial Hardness test.
It uses a small brale penetrator to make a very small indention.

January 30, 2018, 01:25 PM	#21
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 19,163	For surface hardened parts, there is a specific Rockwell Superficial Hardness test. It uses a small brale penetrator to make a very small indention.