Amtec 604C is an AC-DC phosphor/tin bronze electrode that works very well on AC current. This is the only bronze electrode that can be used on AC. This specially developed alloy is excellent for joining copper base alloys not only to themselves, also to stainless steel, cast iron, and steels, including galvanized steel. Provides a smooth deposit free from spatter, with an easily removable slag. Can be welded with easy manipulation in all positions, and has excellent color match on bronze.