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Step 7: Braze the Aluminum. Rub the brazing rod along the channel until it's filled in and finish it off with some more heat. If you don't get the aluminum hot enough the ... Using a propane torch and some aluminum brazing rods is a quick way to bonding aluminum without using a welder.
Thank you for making a carbon arc torch. It looks really good. I have been able to heat and bend steel rod up to around 13mm (1/2 inch) using 6mm carbon rods (1/4 inch) at around 90 amps on my big 230 volt welder.