Ive been asked to make a WPS for welding A-20 to A-20, and A-20 to a P1 material. First off, the only thing I can find on A-20 is in ASME sec. II, where, in that section it lists about 50 different types of plates for pressure vessels. I've been told that it is inconel but cannot find any pertinant information. Anyway, the spec calls for 625 wire on inconel plate. Is this o.k. to use on the P1 to inconel also? I spoke with Speacialty Metals and they suggested using Inco-Alloy's 82dh or 82 ap. Can anybody provide direction.
Travis