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AMS2649D - Etch Inspection of High Strength Steel Parts

Details
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Document Number: AMS2649D
Project Initiation: 04-13-2012
Project Number:
Revision Number: D
Sponsor Name: Gregory Kenneth Haataja
Title
Etch Inspection of High Strength Steel Parts
Scope
This specification establishes the requirements for etch inspection of bare high strength low alloy steel parts having tensile strength of 180 ksi (1241 MPa) and higher and of carburized parts to detect overheating caused by abusive machining or grinding in the heat treated condition, and to detect localized discontinuous carburization. This process is not applicable to surface hardened steels produced by nitriding or carbonitriding. This process may remove 0.0001 to 0.0005 inch (2.5 to 12.7 micrometers) from the surface of the part.
Rationale
This revision results from a Five Year Review. Glass bead is added as acceptable media for use in surface activation, and alkaline clean solution is added as a rinse solution in lieu of sodium hydroxide solution.
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