Solder Wire Form Solid Wire Material Composition 91 Percent Tin 4-5 Percent Copper 1 Percent Others Wire Diameter 0.118 in Weight 1 lb Melting Temperature (Minimum) 410 Degrees F Melting Temperature (Maximum) 418 Degrees F Solder Series Sterling For Joining Brass to Brass Brass to Copper Copper to Copper Application Plumbing Potable Water Container Type Spool Standards ASTM B-32 NSF/ANSI 61-G and 372