Annealed black Iron Wire 1.ISO9001:2000 2.material:low carbon steel 3.wire dia.BWG8-BWG22 high quality and low price Annealed Black Iron Wire Factory Black Iron Wiresimply oil painted against rust, without any galvanizing. So Black Iron Wire is also known as oil painted black iron wire or black mild steel wire. Black iron wire is a kind of hard drawn carbon steel wire, suitable for weaving, ...