Browse Standards J864_199305
Historical REAFFIRMED 1993-05-01

SURFACE HARDNESS TESTING WITH FILES J864_199305

Hardness testing with files consists essentially of cutting or abrading the surface of metal parts, and approximating the hardness by the feel, or extent to which, the file bites into the surface. The term "file hard" means that the surface hardness of the parts tested is such that a new file of proven hardness will not cut the surface of the material being tested.
J864_201801
2018-01-10
Latest
Stabilized
J864_199305
1993-05-01
Historical
Reaffirmed
J864_198812
1988-12-01
Historical
Reaffirmed
J864_198406
1984-06-01
Historical
Revised

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