What filler to use on 5052 Aluminum

[alumboat10]

What are your thoughts on what filler wire to use for Mig welding 5052 1/4" Sheet Aluminum. This would be a butt weld on seams on the bottom of the boat. I worry About corrosion. 4043 or 5356?

5356 on all marine applications and not to put too fine a point on it, but so as you know, a seam in never a butt, a butt runs across the boat a seam along and above 1/8 we say plate not sheet, what are you building?
you should add pms to your profile, I dont mind helping that way

[alumboat10]

thanks for the input. We are building a flat bottom barge and we have used 4 x 10 1/4" plates for the bottom. it is 10' wide x 36' long. I want to make sure we have a good seal. The framework is all 6061 and we have been using 5356 to weld. We were debating on using 4043 or 5356 to weld the plate butt welds on the bottom of the boat.

Originally Posted by alumboat10

thanks for the input. We are building a flat bottom barge and we have used 4 x 10 1/4" plates for the bottom. it is 10' wide x 36' long. I want to make sure we have a good seal. The framework is all 6061 and we have been using 5356 to weld. We were debating on using 4043 or 5356 to weld the plate butt welds on the bottom of the boat.

they are very different and electrolysis can start. great fun welding in barge is it not?
what sort power pack and gun are you using

[alumboat10]

We have a Lincoln Power MIG 350MP with the python gun.

Originally Posted by alumboat10

We have a Lincoln Power MIG 350MP with the python gun.

is that an assist like the cobra was or a true pulling gun? like the hobat linear was?