Steel wire is one of the four major varieties of steel: plate, tube, shape and wire. It is a reprocessed product made of hot rolled wire rod and cold drawn steel wire. According to the section shape, it mainly includes circle, square, rectangle, triangle, ellipse, flat, trapezoid, Z-shape, etc; Classified by size, there are ultra-fine<0.1 mm, thinner 0.1~0.5 mm, thinner 0.5~1.5 mm, medium 1.5~3.0 mm, thicker 3.0~6.0 mm, thicker 6.0~8.0 mm, and extra thick>8.0 mm; According to the strength classification, there are low strength<390 MPa, low strength 390~785 MPa, ordinary strength 785~1225 MPa, high strength 1225~1960 MPa, high strength 1960~3135 MPa, and ultra-high strength>3135 MPa; Classified according to the use: ordinary quality steel wire includes welding rod, nail making, mesh making, packaging and printing steel wire, cold heading steel wire for cold heading rivet, screw, etc., electrical steel includes special steel wire for production of overhead communication line, steel cored aluminum strand, etc., steel wire for textile industry includes comb, heald 013, needle cloth and needle wire, rope making steel wire is specially used for production of steel wire rope and spoke, spring steel wire includes spring and spring washer Steel wire for piano, tire, cord fabric and transportation belt; structural steel wire refers to steel wire for watch industry, ball and automatic machine free cutting; stainless steel wire includes stainless steel wire for above purposes and surgical implant steel wire; resistance alloy wire is used for heater elements and resistance elements; tool steel wire includes steel wire and shoemaking steel wire.
