... work die steel supply , Dongguan songshun mould steel CO.,LTD. as China's largest steel wholesaler, Main Steel has: 4140 steel,D2 steel,4130 steel,H13 steel,P20 steel,AISI 4340 steel ... , Technique: Forged , Special Use: Mold Steel , Shape: plate / flat bar / round bar , Technology: Hot work / Forged/cold drawn , Heat treatment: Annealed / Q+T ...