Hi,

I want to make a welding pit, dimensions 22cm X 11cm X 3cm in stainless steel

As a heating element I have this resistance of Kanthal, to be wrapped around the welding pit ... while as insulation using glass wool or ceramic fiber.

If I use 30mt of 1.2mm thickness resistance with 1.19Ω / m I get about 1480Watt of power ... can it be enough to bring the pond to 400/450 ° C ???

Thanks.

 

Are you perhaps looking to make a reflow oven? But then 400° to 450°C is way too hot for that.

Never heard of a welding pit, but I have heard of oven brazing at much higher temperatures than are used for electronic soldering. A sketch would help as would some description of how you plan to control its temperature..

 

welding crucible

 

Welding crucible? Melting pot? Solder pot? Somehow we need to get on a common terminology.

 

here is the right term:
Solder pot

 

How do you plan to insulate the turns of wire from each other and from the pot? I think it would be easier and much safer to use a ready-made heating element, such as a hob plate or kettle element.

 

As a heating element I have this resistance of Kanthal, to be wrapped around the welding pit

Two things: First, it's in a language I don't understand or read. Second, that looks like solder to me. I don't know what it is. But if it is solder then you don't want to use that in a solder pot. IF the solder is a rosin core solder (or other flux core) you'll have a TON of smoke and fumes, the likes of which will put your health at risk. I once tried that with a spool of silver solder. Smoked up the whole lab and I had to clear out until the smoke dissipated.


[edit] OK, found an Italian to English translator. Yes, that's heater wire. So my advice doesn't apply. But in case you were considering using a spool of solder for your solder pot - - - don't. [end edit]