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API 6Aにおける材料性能等級と鍛造品の鍛造比との関係

2018-12-25View Original

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教えていただきたいのですが、API 6Aにおいて、製品の材料性能レベル(36K、45K、60K、75K)は鍛造品の鍛造比に何か要件がありますか?鍛造比が3:1と4:1の場合、それぞれどの材料グレードに該当するのでしょうか?

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