... Special Steel Co., Ltd. The main products are big size forged round bars, including 9 ... , SNCM439, D2, H13, SAE52100,SK3 and so on are not only used to chinese railway, coal mine, petroleum ... marketing department to face the final customers, we are keeping the strict service attitude all the time ... and asiding by the enterprise credit, insisting on offering good quality service and the mutual developement ...