Products are mainly used in welding wire, hard wire, cold heading steel and construction. The welding wire series products will not break when drawing; the chemistry composition is qualified; the oxide scale is easily removed; the tensile strength could be controlled within the optimal range; low content of C and Si ensures good weldability, and high content of Mn guarantees the deposition strength. The cold heading series steel has less impurity such as S and P, good plasticity and cold upsetting property, and high cold forming property.