Steel Rod Bar, Steel Sheet Plate, Forged Steel manufacturer / supplier in China, offering Machine Steel Bar AISI1045, 4130, 4140, 4145, 4340, 8620, 12crni3, 30crnimo8, Forged Special Steel Round Square Bar in Forgings Product, Head Equipment Forged Special Steel Forgings Process by AISI Standard 4140, 4130, 4145 and so on.