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51CrV4/ 1.8159 forged spring steel bar, forged steel bar, Small MOQ, Dia80-1200mm Chemical composition % of steel 51CrV4 (1.8159): EN 10277-5-2008 C Si Mn P S Cr V 0.47 - 0.55 max 0.4 0.7 - 1.1 max 0...