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welding ali castings.

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darreng

Automotive
Joined
Jan 30, 2004
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5
Location
GB
Hello there just stumbled across this great forum and have my first question allready. today i have been trying to repair an aluminum casting whisT im to belive is a 5% magnesium casting .. i have been trying to repair it with a 5356 5% magnesium Welding rod and using pureshield argon 99% pure gas... it seems the parent material doesnt like this does anyone have any suggestions on a better/more suitable rod/gas combination to try ?? any help would be greatly appriecated.. Darren
 
darrenG;
1.) Providing the forum with the specific Al alloy would help in your selection of filler metals.

2.) Try adding helium to your shielding, it will increase arc voltage and heat input to your Al casting. Try also preheating (not excessively) your part. How is the part being prepared prior to welding? What process are you using?

3.) Finally, what is it specifically the material "...dosen't like..."? Is it difficult to adhere filler metal to, contamination, etc.
 
If the gas is 99% argon, 1% oxygen, that is a problem. Use 100% argon.
 
ok thanks very much for your advice so far i will get the exact material spec this morning...
 
hello again the material spec of the al is GD NGAL8ZN2
 
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