If this is not a "structural" weld.... you could get yourself some silicone bronze...
By the way -- I don't think you could NOT have warpage on that flat plate of some kind. Any time you heat metal you expand it and when it cools it shrinks... since you're welding in only one area that area is going to expand and contract more (warpage).
What you may need to do is to make your gauges match --- but we don't know what you're building...
Does the piece require the two gauges of metal? Could you use an L shape and just plug weld it? Or use a thicker gauge and drill and tap it to attach your flat?
|