AL-MG-SI TYPE DELAYED AGE HARDENING ALUMINUM ALLOY FOR FORGING

摘要

PURPOSE:To obtain the titled Al alloy having superior cold forgeability, strength and extrusibility by specifying a composition consisting of Mg, Si, Sn, Cu, Ti, B, Mn, Cr, Zr and Al. CONSTITUTION:This Al-Mg-Si type delayed age hardening Al alloy for forging consists of, by weight, 0.3-0.8% Mg, 0.40-1.5% Si (Si%Mg%), 0.01-1.0% Sn, 0.05-1.0% Cu, 0.001-0.10% Ti, 0.0001-0.01% B and the balance Al with inevitable impurities or further contains one or more among =1.0% Mn, =0.30% Cr and =0.30% Zr. The Al alloy has superior strength, delayed age hardenability at ordinary temp. for about 1-6 months, low deformation resistance and superior cold forgeability.