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ARC WELDING

General Tech Talk

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ARC WELDING

Post by kranked_dirt »

Excuse my ignorance :oops: ... can aluminium be welded with an arc welder, if so what electrodes do i use, any special way it should be done??

cheers
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Post by mickbeny »

Hi all...K-D,No you cant weld alluminium with an electrode,you caN mig and tig[AC hf only]Aluminium though.
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Post by mickyd555 »

to mig weld aluminium is preety hard if you dont know what your doing......how do i know this......cause i tried and failed. if your gonna mig it you need straight argon gas, and from memory lots of heat. tig is the way to go, and if its just to repair a bullbar or something, i dont think it would be costly to get it done by a pro.... good luck
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Post by bru21 »

ally is ok with mig or tig. cleanleness cannot be more important. the weld puddle tends to pool without flowing on if there is contamination present, and often drops through. be clean buy a new wirw brush and use it for ally only, removing anodizing helps too.

cheers bru
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Post by ratboy »

bru21 wrote:ally is ok with mig or tig. cleanleness cannot be more important. the weld puddle tends to pool without flowing on if there is contamination present, and often drops through. be clean buy a new wirw brush and use it for ally only, removing anodizing helps too.

cheers bru





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Post by bazooked »

oh and heat is not the key for ali it will drop away without warning, u cant see the colour change like in steel.
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Post by Dane »

I have seen arc welder electrodes for aluminium, but have not used them. Mig welding ally is best suited to heavier sections (+6mm) and as well as bru's comments, pre heating the job with oxy helps a great deal. Definitely tig for the lighter stuff. Use a stainless steel wire brush.
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Post by thomo »

Plus you need a high freq tig for ally dont think to many people have them in there shed.
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Post by Major60 »

Dane wrote:I have seen arc welder electrodes for aluminium, .


Yes they exist, ..... and I wouldn't rust any critical welds with them...
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Post by Damo »

Dane wrote:Use a stainless steel wire brush.


Yes! And if it's been oily/greasy you may need to give it a wipe with metho to get it nice & clean.
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