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??????????? Ni--------- 50.0-55.0????????? AL ----------- 0.20-0.80
化学??? C ---------- 0.08 max????????? Ti ----------- 0.65-1.15
成份??? Mn --------- 0.35 max?????????Nba?---------- 4.75-5.50
??????????? Fe ------------? 剩余??????????? ?Mo ----------- 2.80-3.30????
?????????? ?S? -------- 0.015 max????????? P ------------- 0.015max
??????????? Si ---------- 0.35max????????? B ------------- 0.006max
???????????Cu ---------- 0.30max????????? Co ---------------1.0max
??????????? Cr -------- 17.0-21.0
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