BS 7862:1996 PDF

Scope: This International Standard specifies standard pro-cedures and requirements for the detection and classi-fication of localized overheating on ground surfaces by chemical etch methods. Some methods which have been used in the past are no longer recommended. Specifications should be changed to use the methods in this International Standard. These etching methods are more sensitive to changes in surface hardness than most hardness testing methods. This International Standard applies to steel parts such as gears, shafts, splines and bearings, but is not appli-cable to nitrided parts and stainless steels. NOTE 1 This process, although at times called "nital etch", should not be confused with other processes also known as "nital etch". The surface temper etch procedure is to be performed after grinding and before additional finishing operations.

BS 7862:1996 history

2017 BS ISO 14104:2017 Gears. Surface temper etch inspection after grinding, chemical method
2014 BS ISO 14104:2014 Gears. Surface temper etch inspection after grinding, chemical method
1996 BS 7862:1996 Gears - Surface temper etch inspection after grinding