FILLER METAL FOR WELDING ALUMINUM ALLOYS

摘要

Filler metal for welding aluminum base alloys obtains improved resistance to stress corrosion cracking. The composition of the filler metal includes a copper addition which suppresses weld boundary corrosion. High weld strengths are attained using the said filler metal. The filler metal consists essentially of in weight %: zinc from 0.05 to 0.25%; magnesium up to 5.5%; copper from 0.2 to 0.5%; manganese from 0.05 to 2.5%; titanium from 0.1 to 0.25%: chromium from 0.05 to 0.3%; and the balance aluminum.