The special chain plant within Hengjiu Group has always been providing products and design services for mining e and metallurgy industry and has rich design and manufacture experience in making the chains used for mine and metallurgy industry. Therefore, chains used for mine and metallurgy industry are the most typical products among the engineering chains of Hengjiu Group. Precise measurements and stable mechanical property can assure that each batch of chain has high tensile strength and fatigue strength, which are favored by the domestic steel plants, used in hot rolled wire rod production line, steel billet and steel ingot continuous casting production line, billet processing transfer line, scraper chain, dust bin conveyeor, and so on.