Material: super carbon steel Processing by drawing Standard wire gauge: BWG 8 to BWG38 Tensile Strength: 500~980 N/mm2 Application: used in construction for binding or others way Coil weight: 25kg, 50kg, 100kg, 200kg in normal coils 400~500 Kg or by Z2, Z3 coils Black Iron Wire is also known as oil painted black iron wire or black mild steel wire. Black Iron Wire is offered in the form of coil wire, tie wire or cut into straight wire. Black iron wire is mostly used as binding wire or tie wire Black Oil Wire Processes: wire-drawing, anneal, and fuel oil injection.