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US 4,232,095 AGranted
Filler metal in a welded assembly
AssigneeSwiss Aluminium Ltd.
InventorsMiroslav Pirner, Heinrich Zoller, Heinz Bichsel
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Abstract
Filler metal for welding AlZnMg type alloys raises the resistance to stress corrosion without increasing the susceptibility to exfoliation corrosion. The composition of the filler metal includes a copper addition which suppresses weld boundary corrosion while additions of manganese, titanium, chromium and zirconium inhibit weld cracking. High weld strengths are attained using the said filler metal.
Claims10
A filler metal in a welded assembly with aluminum alloys, said filler metal consisting essentially of:
- zinc from 1.0 to 4.0%;
- magnesium from 2.0 to 5.0%;
- copper from 0.2 to 0.5%;
- manganese from 0.3 to 0.5%;
- titanium from 0.05 to 0.2%;
- chromium from 0.05 to 0.3%;
- zirconium from 0.05 to 0.2%;
- balance aluminum, said filler metal producing welded aluminum assemblies wherein the weld has the same strength as the parent metal plus has resistance to weld boundary corrosion, weld cracking and stress corrosion without a corresponding increase in susceptibility to exfoliation corrosion in the heat affected zone.
5 more elements
Dependencies are inferred from the claim text.