Aluminum spool AWS Classification ER4043 Material Aluminum Process MIG Welding (GMAW) Wire Diameter 0.03 in Tensile Strength (As Welded) 29ksi Yield Strength (Minimum Required) 29 ksi Yield Strength (As Welded) Not Specified Spool Type Plastic Spool Series ER4043 Weight 4 lb For Material Type Aluminum