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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.
Once coated, the steel member can be arc welded to the aluminum member, if care is taken to prevent the arc from impinging on the steel. A specific technique must be used during welding to direct the arc onto the aluminum member and to allow the molten aluminum from the weld pool to flow onto the aluminum-coated steel.