Recent Development of R & D of Linepipe-purpose Steels by Wuhan Iron and Steel （Group） Corporation

Elaborated in the article are the major achievements of R & D of manufacturing technologies for and products of steels for line pipe-making in Wuhan Iron and Steel (Group) Corp. Thanks to employment of the STMCP technique, the steel for heavy wall off-shore pipe line service and anti-large deformation linepipe-purpose X80 steels are developed successfully. And owing to the mastery of the mechanism of erosion/wear resistance, the WJ65 steel for pipe line for long-distance coal slurry transport is also successfully produced. Furthermore, with know-how about relevant chemical composition and manufacturing process, the company is capable of commercial production of such products as the steel for coiled tubing, the X90 steel for hi-pressure gas pipeline system with extra-capacity, and the K55 steel for HFW pipes.