ISO 14104:2017 PDF

Scope: This document specifies procedures and requirements for the detection and classification of localized overheating on ground surfaces by chemical etch methods. The process described in this document is typically used on ground surfaces; however, it is also useful for the detection of surface anomalies that result from post-heat treatment machining such as hard turning, milling and edge breaking (deburring) processes. Surface metallurgical anomalies caused by carburization or decarburization are also readily detectable with this process. Some methods which have been used in the past are no longer recommended. Specifications are intended to be changed to use the methods in this document. These etchingmethods are more sensitive to changes in surface hardness than mosthardness testingmethods. This document applies to steel parts such as gears, shafts, splines and bearings. It is not applicable to nitrided parts and stainless steels. NOTE This process, although attimes called “nital etch”, is notintended to be confused with otherprocesses also known as “nital etch”. The surface temper etch procedure is performed after grinding and before additional finishing operations such as superfinishing, shot peening and honing.

ISO 14104:2017 Referenced Document

ISO 9712:2012 Non-destructive testing - Qualification and certification of NDT personnel
SAE AMS2759/9-1996 Hydrogen Embrittlement Relief (Baking) of Steel Parts

2017 ISO 14104:2017 Gears - Surface temper etch inspection after grinding, chemical method
2014 ISO 14104:2014 Gears - Surface temper etch inspection after grinding, chemical method
1995 ISO 14104:1995 Gears - Surface temper etch inspection after grinding