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ASTM A231 Chromium-Vanadium Alloy Steel Spring Wire Chemical composition C Si Mn P S Cr V 0.48 - 0.53 0.15 - 0.35 0.70 - 0.90 max 0.025 max 0.025 0.80-1.10 0.15 MIN Supplying Size: Diameter:0.3-20mm ...