Copper alloy and brass wires ... centigrade. Suited for argon arc welding of copper, aluminum bronze, silcon bronze and brass as ... well as copper with steel.HS221:It's melting range ... . Suited for welding and /or brazing copper, steel , nickel copper alloy , grey cast iron as well ... flame and / or high frequency brazing copper, steel, nickel copper alloy, grey cast iron as well as ...