Alloy R-C355.0 (R4009) includes aluminum-silicon-magnesium and copper Almigweld and Altigweld filler wire with low iron content to weld alloys 355.0 and A355.0. (See also Aluminum C355, Alloy Digest A1-115, June 1962, and Aluminum C355.0, Alloy Digest Al-243, February 1983.) This datasheet provides information on composition and physical properties. It also includes information on joining. Filing Code: Al-327. Producer or source: AlcoTec Wire Corporation.