Doosan Heavy Industries & Construction Co., Ltd , (Doosan), the largest, most modern fully-integrated manufacturing Company in the Republic of Korea, specializes in manufacturing Power Plant Equipment, Chemical & Petrochemical Plant Equipment, Iron & Steel Making Machinery, Marine Diesel Engines, and Heavy Castings & Forgings. Casting and Forging Business Group of Doosan produces Quality Plastic Mould Steel and Tool Steel. Mould Steel varieties include HP4A, HP4MA and HP4MA (D2) high hard. The special alloy elements in their HP series plastic Mould steel assures better etching quality, polish-ability and weld-ability as compared to other mould steel available in the market. Doosan Tool Steels are available in wide range both for hot working and cold working. These include STD61 and STF4M both in normal and ESR quality. MD Corporation is Exclusive Sales agent of DOOSAN in India for Plastic Mould Steel & Tool Steel.