Black Annealed Wire QC: pass ISO9001:2000, high quality Dia: 1.6-4.0mm Tensile strength: 40-120kg/sqm Elongation: >15% Black Annealed Wire: black annealed wire also called soft annealed wire, annealed iron wire, anealed wire. It is made of high quality iron wire, Its raw materials is Q195,Selected by 1000 C or so after the raw materials calcined keep enough time, and then to appropiate cooling ...