How to weld alloys?

   / How to weld alloys? #11  
<font color=blue>Do you think preheat and postheat are still needed with the wire welder? </font color=blue>

Any type of heat treatment is going to depend upon how thick the base metal is. If it thin gauge tubing then you would probably be okay without a preheat or postweld heat treatment. Of course this assue that the ambient temperature is not below freezing. If it real cold then preheat would be required.

Randy
 

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