Solder Wire Form Flux-Cored Wire Material Composition 60 PercentTin 40 Percent Lead Wire Diameter 0.03125 in Weight 16 oz Melting Temperature (Minimum) 445 Degrees F Melting Temperature (Maximum) 500 Degrees F Flux Type Rosin Solder Series 60/40 For Joining Copper Alloy Lead Nickel Alloy Steel Application Electrical Small Connection Container Type Spool Flux Requirement Contains Flux Core Standards ASTM B-32 J-STD-006