Zinc-aluminum solder wrapped ZnAl4 FC Zinc-aluminum wrapped solder Composition (%): Zn: 96% Al: 4 % Si: - other: - Melting point range: 385-418 oC Operating temperature: 410 oC Characteristics: Zinc-aluminum solder with a low melting point. Ideal for soldering thin-walled aluminum components. It can also be used for aluminum-copper connections. Lined with non-hygroscopic flux, the residue of which is non-corrosive.