How should the argon barrel and 1018 powder chamber be welded to each other, Will be done with a wire- gas welder, The powder chamber is 6 in. round with a 30 deg. to 4 in. flat end, and the flat on the tube was sawed to a 4 in flat..This will mate up perfect with a chamber on the tube, What are the condition now for the welding to be done, Like heat, wire size and ect. Thanks- Joe