[mowhawk2]

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I have a bedframe that looks like it's cast potmetal or cast iron. Not sure which. It's hollow, thin metal. I'm an HVAC contractor so I have dual gas, but I think that might be too hot. It's got two spots that need to be repaired. Trying to determine whether a low temp propane with aluminum rods or another low temp rod would work best for this. Any suggestions would be greatly appreciated. I thought about cheating with some JB, but where's the fun in that?

[cj737]

Aluminum rods won't stick to steel, no matter the temp.

Maybe just braze it (as you're an HVAC guy already).

[Poland308]

Is it magnetic?

https://www.harrisproductsgroup.com/~/m ... dering.pdf

[LtBadd]

It's hollow, thin metal.

Unless it's very old I would doubt that its cast iron, but sitting behind my keyboard I could be wrong.

[Bill Beauregard]

Need more information. Steel is easy, period. Aluminum isn't hard, if you have the equipment. Pot metal, or white metal, (a random mix of floor sweepings) is hard to find a suitable filler for.

[mowhawk2]

It is ferrous. Its not extremely old, my guess would be less than 20 yrs. I wish it was aluminum. That's an easy fix. Copper would be better.

I think that my ox/acet would be way too hot for the thickness of the metal, I use a 15 silver alloy by there are a lot of options for this too. Some have no silver, most people use a 5%. I have some no silver alloy rods, lower temp might be beneficial. Willing to give it a shot. The original welds appear to be mig and the metal is so thin that when they broke it pulled a chunk out of the frame rather that actually break the weld.

[Poland308]

You need 45% silver or higher percentage to get good adhesion to steel. Oxy acetylene should be fine just use a 0 or 00 or 000 tip. Keep your gas pressure low and you can get small flame. You can also get it hot enough to braze with a mapp gas torch.