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QQ-C-320 + AMS 2406 -versus- ASTM B650

With so many standards and testing procedures out there, it is hard to keep track of what's the same and what's different; what's interchangeable and what isn't. Recently I specified ASTM B650 to cover my chromium plating needs for a hydraulic cylinder rod in a heavy duty application (off-road/defence). Understanding that this spec covers quite a lot of needs (thickness, baking for hydrogen embrittlement, salt testing), does anyone know if this can be covered by QQ-C-320 and/or AMS2406, in case some platers may choose to identify only with the latter and not the former.

Brian Bernal
Product Designer - Brampton, Ontario, Canada
December 15, 2009

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December 18, 2009

Brian,

You need to do a gap assessment between the specifications and satisfy yourself about where the gaps lie. You can then determine which features are most important to you and whether you could then accept the specifications as equivalent.

You can get hold of a copy of QQ-P-320 from assist quicksearch, the AMS is from SAE.

Brian Terry
Aerospace - Yeovil, Somerset, UK