兑水 发表于 2009-9-7 09:46:11

ASTM A 522-2001 低温用锻制或轧制含镍8%和9%的合金钢法兰...

A522/A522M-01 Standard Specification for Forged or Rolled 8 and 9% Nickel Alloy Steel Flanges, Fittings, Valves, and Parts for Low-Temperature Service
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