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31CrMoV9 Alloy Steel Forgings EN 10085 1.8519 Steel Forgings Rings DIN 17211 1.8519 Forged Steel Ring (A) 31CrMoV9 Element: Brand composition(%) C Si ≤ Mn P ≤ S ≤ Cr Mo V 31CrMoV9 0.27~0.34 0.4 0.4~0...