PRODUCT INFORMATION Category: Nickel Alloy (ER) Alloy: WWNA67 (Copper Nickel) Class: ERCuNi Alloy 67 Description: For gas metal arc and gas tungsten arc welding 70/30, 80/20, ad 90/10 copper-nickel alloys. A barrier layer of nickel alloy 610 is recommended prior to overlaying steel with GMAW process. Chemical Composition Cu Remainder Mn 1.0 max Fe 0.40-0.75 Si 0.25 max Ni 29.0-32.0 P 0.02 max S 0.01 max Pb 0.02 max Ti 0.20-0.50 Others 0.50 max