GB604813A - A new aluminium base alloy - Google Patents

Abstract

An aluminium base alloy has the following composition: Zn 3.00-10,00 per cent, Mg 1.00-5.00 per cent, Cu 1.10-5.50 per cent, Si 0.01-1.50 per cent, Fe 0.01-1.50 per cent, Ni 0-5.00 per cent, Mn 0-3.50 per cent, Al being the remainder but so that in the absence of Mn the Ni content exceeds 3.5 or in the absence of Ni the Mn content exceeds 2.0 per cent but if Mn and Ni are simultaneously present their combined content must exceed 4.0 per cent, the Mn proportion must exceed 0.38 per cent and the Cu and Mg must each be present in a proportion of 2.0 per cent or under. The alloy may contain one or more of the following elements each in the stated proportions, the total of these elements not exceeding 1.75 per cent. Sb up to 1.50 per cent, Sn up to 1.50 per cent, Ti up to 0.70 per cent, Nb up to 1.00 per cent, Ce up to 1.00 per cent, Co up to 1.75 per cent. The alloy may contain one or more of Be, B, Cr, Ta, Te, Tl, Th, W, V, Zr, Yt not exceeding 1.50 per cent in total, and one or more of Bi, Cd, As, Na, Ba and P not exceeding 0.50 per cent in total. The alloy is preferably used in the worked condition and it may be subjected to solution treatment, e.g., at 480 to 530 DEG C. for about 1/2 -4 hours followed by quenching in water or other medium, followed by natural ageing or artificial ageing, e.g. at about 100-170 DEG C. for about 2-24 hours.