AISI 4140 1020 1045 Cold Drawn hot rolled structure mild carbon/alloy forged bright cylinder steel round bar

Qingdao Uni-Zhongjian Steel Co. Ltd belong to Shandong Zhongjian Steel Co.,Ltd which is located in the beautiful seaside city --Qingdao,be established in 2004,and it is a comprehensive large enterprise involves in production ,processing, imports and exports, trading, and transportation. Our company can undertake the export orders of production, processing, cutting, shear, packing, commodity inspection, customs clearance and other related business. We have established long-...