... s Stainless Steel Sub Arc Wire The sub arc process uses a powdered flux that the welding wire is submerged into. The welding process takes ... stainless steel. Spec.ER304, ER308, ER308L, ER321, ER309, ER309L, ER310, ER316, ER316L, ER347……Dia.Φ2.0mm~Φ5.0mm stainless steel submerged arc welding wire ...