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AiSi ASTM bs DIN GB JIS Round Bar Feature: Standard: AiSi, ASTM, bs, DIN, GB, JIS Tolerance: ±1% Diameter: 8-900mm,according to customers' damands Grade: 12Cr1MoV Cr5Mo 15CrMo 30CrMo 40CrMo 20SiMn ...