This standard specifies standard procedures and requirements forthe detection and classification of localized overheating on groundsurfaces by chemical etch methods.
Some methods which have been used in the past are no longerrecommended. Specifications should be changed to use the methods inthis standard. These etching methods are more sensitive to changesin surface hardness than most hardness testing methods.
This standard applies to steel parts, such as gears, shafts,splines and bearings, but is not applicable to nitrided parts andstainless steels.
NOTE: This process, although at times called“nital etch”, should notbeconfusedwith other processes also knownas “nital etc”.
The surface temper etch procedure is to be per- formed aftergrinding and before additional finishing operations.
- Edition:
- C00
- Published:
- 03/02/2000
- Number of Pages:
- 14
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