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There is substantial risk in galvanizing AR400 steel, or for that matter any AR steels. The tensile strength of AR400 is in the range of 180,000 to 200,000 psi and the steel has a hardness of approximately 400 Brinell. This means the grain structure is very small and consequently hydrogen from the pickling acids in the galvanizing process are trapped in the grain structure. This tends to make the galvanized AR400 steel brittle.

More Info on Hydrogen Embrittlement

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