AlcoTec weld filler wire 4145 is a general-purpose high-silicon-containing wire for both welding and brazing. The alloy is often used instead of 2319 for welding higher-strength alloys because of its low melting temperature and high fluidity. This datasheet provides information on composition and physical properties. It also includes information on joining. Filing Code: AL-383. Producer or source: AlcoTec Wire Corporation.