steel wire rod Dia:5.5mm-14mm Grade:H08A, 30MnSi. Steel Wire RodDia:5.5mm-14mmSteel grade:Q195/Q235, H08A, 30MnSiUsage:It is mainly used for building industry, it is the main steel material in pipe pile foundation, has high strength, low usage of metallic material, convenience usage and the quality was easily promised, it has a extensive usage building industry. wire rod(steel wire)