Gu Chang-year foundry with you to share the advantages of cast iron covers: good toughness. Impact value and carbon steel exhaustive, is 10 times more gray iron materials. Corrosion resistance. Spray corrosion test, the amount of corrosion of steel is only ninety days of 1/40 diameter manhole covers, gray iron pipe 1/10. Life is twice as gray iron pipe is 5 times that of ordinary steel pipe. Good plasticity. Elongation ≥7%, with similar high-carbon steel, and gray iron material elongation zero. Custom cast iron manhole covers, on the choice of Gu Chang in foundry. Gu Chang-year foundry tells you how to choose the ductile covers manufacturers: 1. advanced technology equipment and improve the quality inspection system 2. 3. 4. Improve the quality of raw material supply service Gu Chang-year foundry was built in 2006 manhole covers, is a new modern and dynamic enterprises. Since the construction of ongoing efforts to grow, is to become a professional production of ductile iron manhole covers covers corporate design, the annual production capacity of 5,000 tons, is being expanded with an annual output of 10,000 tons. I would like to plant good quality, competitive price, on-time delivery for the majority of merchants to provide high-quality service. Size of manhole covers, Chang-year foundry (certified), Datong manhole covers are provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) is Jinzhong, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang-year leadership in the foundry staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.