Mig Welding Wire, AWS Classification ERCuSi-A, Material Copper, Process MIG Welding (GMAW), Wire Diameter 0.03 in, Tensile Strength (As Welded) 50 ksi, Yield Strength (Minimum Required) Not Rated, Yield Strength (As Welded) Not Specified, Spool Type Plastic Spool, Series ERCuSi-A, Weight 11 lb, For Material Type Brass to Cast Iron, Brass to Steel, Bronze to Cast Iron, Bronze to Steel, Cast Iron to Copper, Copper to Steel, Welding Current Designation AC, DCEP WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. - Nickel (Metallic)