Steel wire is one of the four major varieties of steel plate, tube, shape and wire. It is made of hot-rolled wire rod and cold-drawn. steel wire, Reprocessed products made. According to the shape of the section, there are mainly circle, square, rectangle, triangle, ellipse, flat, trapezoid, Z-shaped, etc.; 1.5~3.0mm, thick 3.0~6.0mm, thicker 6.0~8.0mm, extra thick>8.0mm; classified by strength, there are low strength <390MPa, lower strength 390~785MPa, normal strength 785~1225 MPa, higher strength 1225~1960 MPa, high strength 1960~3135 MPa, extra high strength >3135 MPa; classified by use: ordinary quality steel wire including welding rod, nail making, net making, packaging and printing industry Steel wire, cold upsetting steel wire for cold upsetting rivets, screws, etc., electrical steel including special steel wire for production of overhead communication lines, steel core aluminum stranded wire, etc. Steel wire, rope making wire specially used for the production of steel wire rope and spokes, spring wire including spring and spring washer, piano and tire, cord and transport tape steel wire, structural steel wire refers to the watch industry, ball, automatic machine free cutting steel wire, stainless steel wire Including stainless steel wire and surgical implant wire for the above-mentioned purposes, resistance alloy wire for heater element and resistance element, tool wire including steel wire and shoe-making wire.