Just wondering if anybody on the forum knows if there is such thing as a “craft welder” ie something small, inexpensive and easy to use, that can bond steel or more importantly brass. even like a decent glue.
WHY?
I make smallish sculptures and often use thin brass tubes. i would like to bond them somehow.
what about a soldering iron would that work?
had a look on the net but i dont even know what to type into google
ask oui-oui-skid, he’s a plumber and had something to say on here a few weeks back about blowtorches. probably bunnings / supercheap for low, low prices
It’s a paste/powder or core/sheath of your filler that acts as a wetting agent and prevents oxidation of the metal when you’re heating it and assists in removal of contaminants after.
For simple brazing (soldering generally refers to lower temperature (<450ºC) joining eg: Pb-Sn filler alloy, ~200ºC melting point, low strength), you could use a MAPP torch (hardware store) with a brass filler easily enough. A propane torch may even do the trick depending on the filler you use.
One of the geeks that worked here a few years ago used to make tiny little helicopters that flew*. Very fine metal tubes were used a lot. He used to use a tiny little butane blowtorch for brazing and soldering. It was about the size of a CO2 inflator and it produced a very fine pointy flame.
*Edit: He is in the Army now, flying much bigger helicopters.
I only understood maybe a 1/4 of what you wrote, but in that quarter am i to understand that Soldering is lower stregnth? and i should get a MAPP torch and some Filler?
You can build a bike frame with a MAPP torch (da_frog has one and repaired his Van Werkhoven with it). Probably overkill for your needs.
If you’re only making non-structural items, you may get away with lead-tin solder, silver soldering is between Pb-Sn & brass in terms of melting point so would be easier to use with a basic propane / butane torch. It does need closer tolerances on your joints though.
The cheapest route would be to get a pencil butane/propane torch and some flux cored lead-tin solder, then test join some tubing and see how much force it takes to break the joint afterwards.
Try Jaycar / Dick Smith also for torches / solder.