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  1. htfi13856

    AISI 4140 Alloy

    I had a NAS1219-3-8 reworked, material called for Alloy steel, UNS G41400, By rework, i had them grinded down to a smaller length , Now I was told they failed inspection that my Rockwell was: C31-40. Is this possible? Please help, any information or direction would be greatly appreciated.

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