Of course the high strength aluminums are in a heat treated condition when
looking at their highest yield strengths .
Then 6061 is popular with machine shops because it machines well and becaus
e it is easily available . It is often welded but it is not the best weldin
g aluminum and it is not the highest strength aluminum . The yield strength
is 50,000 . (When aftermarket fabricators say that something is billet the
y usually mean machined from 6061 .)
And 7075 is famous for strength but it does not weld very well. The yield s
trength is 76,000 !
But don't forget about 2024 and it does not weld very well. The yield stren
gth here is 67,000 .
And so here are some high strength aluminum alloys that are better for weld
2219, yield strength 66,000
2519, yield strength 66,000
7003, yield strength 50,000
7005, yield strength 51,000
7039, yield strength 58,000
But each aluminum alloy requires a certain type of filler material for weld
8 years ago