Union Al Si 5 is a TIG rod for welding aluminium and its alloys. It works on frames, tanks, housings and light structures in aluminium alloys.
Base materials include EN AW-6060, AlMgSi, AlMgSi0, AlSiMg, EN AW-6082, AlMgSi1 and EN AW-6061. You feed the rod into the pool by hand while the arc burns between the tungsten electrode and the weld, which makes it a fit for aluminium structures, tanks, vehicle parts and shipbuilding.
- Classification EN ISO: 18273 S Al 4043A (AlSi5(A))
- AWS classification: A5.10 / SFA-5.10 ER4043A
- Shielding gas: I1, I3
- Approvals: DB (61.132.02), CE
Remove the oxide layer with a stainless steel brush right before welding, aluminium oxide melts far higher than the metal itself. Protect the root when you weld from one side, an oxidised underside spoils the corrosion resistance. Keep the rod inside the gas shield even after you lift it from the pool, a cold oxidised end will contaminate the next drop.
