... of the Qilu Special Steel Co., Ltd. The main products are big size forged round bars, including 9 series(Alloy structure steel ... , SCM440, SCM435, SNCM439, D2, H13, SAE52100,SK3 and so on are not only used to chinese railway, coal mine, petroleum, shipbuilding ... . As the marketing department to face the final customers, we are keeping the strict service attitude all the time, following internal ...