How To Mig Weld Aluminum Boat. The key to Mig welding this metal is to match the amperage with the thickness of the material being welded. How to pulse mig weld in depth tutorial welding on an aluminum.
If you are trying to join aluminum with another metal then TIG welding is the best option. Hes willing to buy the gear needed to weld it. When you weld you match the filler metal to the additive added to the Aluminum alloy.
There are a few tips that help buy on aluminum castings like boat props and crankcases you will probably never have a weld that is completely free of porosity.
Here are some things to do that can help you when you are MIG welding thick Aluminum and your welder isnt quite up to it. However for marine use it does have disadvantages. Do a TIG root run then a MIG capping run. MIG or TIG on an aluminum speed boat 02-22-2012 0134 PM.