Esab Arcaloy MC18CrCb description: Arcaloy MC18CrCb is an 18% Cr alloy metal cored electrode stabilized with Titanium (Ti) and Niobium (Nb). It is designed for welding Armco 18Cr-Cb HP-10TM stainless steels used in catalytic converters, manifolds, mufflers, and exhaust systems. It is also suited for welding parts with poor fit up. Arcaloy MC18CrCb produces a smooth spray-type metal transfer with very minimal spatter.