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  1. mpdjw

    Hardness on P1 after PWHT

    Just to clarify, the term P1 on its own can sometimes be misleading. P1 can refer to either of the following: The material grouping in ASME IX (carbon steel) The specific material grade from ASTM A335 (0.5Mo low alloy steel - which has a material grouping of P3) Which is it in this case? It...
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