Corrosion Resistance Alloy (CRA) and Stainless Steel

[JHWC]

Hi All,

May I know what is the differences between CRA and SS?

Thanks,
Jeffrey

 

[tbuelna]

I believe Corrosion Resistant Alloys (CRA) can include titanium or nickel alloys like Inconel. Stainless Steels (SS) would be a subset of Corrosion Resistant Alloys.

 

[EdStainless]

In fact CRA can be anything from a 5% Cr steel up through Ni or Co based alloys. It is shorthand for saying "not a common steel".
SS are Fe based alloys (more Fe than any other single ingredient) with Cr as the major addition (usually more than 10.5% Cr).

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P.E. Metallurgy, Plymouth Tube