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<blockquote data-quote="thill" data-source="post: 508526" data-attributes="member: 4972">You definitely need to use Argon when welding aluminum.&nbsp; Brazing might work, but I could never get it to work for me.&nbsp; It would never stick for me.&nbsp; I probably needed some kind of flux, or I just didn&#039;t do something right.Yes, it makes it much easier if you use a backing plate.&nbsp; I use steel, as it won&#039;t stick or melt.&nbsp;&nbsp; On that boat, I didn&#039;t use a backing plate.&nbsp;&nbsp; I just did short semi-circle welds for only a second at a time, letting it cool in-between so it didn&#039;t melt a bigger hole.&nbsp;&nbsp; Worked great, couldn&#039;t be happier, and I learned a lot in the process.This was only my 2nd time welding aluminum.&nbsp; &nbsp; Watch some YouTube vids about MIG aluminum settings and then play around welding some scrap.&nbsp; &nbsp; Once you start feeling good about that, flap disc the area clean, and only do small beads before stopping and letting it cool.Welding is VERY satisfying!</blockquote>

[QUOTE="thill, post: 508526, member: 4972"] You definitely need to use Argon when welding aluminum. Brazing might work, but I could never get it to work for me. It would never stick for me. I probably needed some kind of flux, or I just didn't do something right. Yes, it makes it much easier if you use a backing plate. I use steel, as it won't stick or melt. On that boat, I didn't use a backing plate. I just did short semi-circle welds for only a second at a time, letting it cool in-between so it didn't melt a bigger hole. Worked great, couldn't be happier, and I learned a lot in the process. This was only my 2nd time welding aluminum. Watch some YouTube vids about MIG aluminum settings and then play around welding some scrap. Once you start feeling good about that, flap disc the area clean, and only do small beads before stopping and letting it cool. Welding is VERY satisfying! [/QUOTE]

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