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I have an old microwave/convection oven that came with 2 metal circular trays for cooking on (in convection mode), a tall one and a shorter one that fits underneath it. However, a long time ago, one of the legs of the taller one snapped off, leaving me with just the shorter one. This is OK usually, except when I want to cook 2 things at once (that don't fit on one tray). I can get a replacement for >$40, but I'm just not interested in spending that much.

I recently had the idea to solder a new leg to the tray. Presumably I'd need some high-temperature solder. Considering it may come in contact with food, it'll have to be lead-free too (maybe flux is also a problem?). I'll have a soldering iron that can supposedly reach 896ºF, and the oven has a max temperature of 450ºF. I need solder that is both solid and stable up to at least ~500ºF (It can't just not melt, it has to be able to hold its shape!). I honestly couldn't find anything that meets my criteria; some contain lead, most melt too low, and some just too high. Does anyone know if such a thing even exists?

Thank you!

Rafael
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There is some serious fake information on the "Net" regarding "silver solder". ; starting with Oatey ( Home Depot) who flat out lies about what they call "silver solder". The Halstead net site is good. AWS ( American Welding Society) identifies silver solders as having 45 % to about 60 % silver with copper, zinc, cadmium in various amounts. Melting ranges of 1125 F to 1250 F and must be heated above those temperatures to flow. These alloys have AWS designations of B Ag-1 up to B Ag-7. I would not consider a product to actually be silver solder unless it had an AWS designation. ( I am using a 1971 ASM reference and AWS may have added designations or even changed their system ).( Irony , I gave my 1987 ASM reference to a local teacher a few days ago because I had not used it in years).

blacksmith37
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Not gonna work.

The problem is you are trying to use a metal fusing technique, using a thermoplastic material (i.e. whose properties remain basically the same, and can be re-melted at will). And using the tools you already have on hand.

The crux of the problem is that the tools you already have are incapable of making the material significantly hotter than the service you wish to put it into. Any solder your iron could melt, will also be melted by the oven.

Harper - Reinstate Monica
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