The furnace used can be refractory lined and heated by gas, oil or electricity. Atmospheres can be either a generated gas (endothermic or exothermic) or an inert gas such as argon or nitrogen. Hydrogen gas is also used for brazing filler metals that oxidize in other atmospheres. Copper, silver, nickel and gold based brazing filler metals can be brazed successfully in these types of furnaces.
