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AISI 431 ( 1.4057 ) Cold Rolled Stainless Steel Sheets AISI EN, DIN GB JIS 431 1.4057 X20CrNi16-2 1Cr17Ni2 SUS431 Typical chemical composition % C Si Mn P S Cr Ni 0.19 0.25 0.40 0.025 0.001 15.9 1.6 ...