Gu Chang-year foundry mainly produces ductile iron covers. Mainly built by ductile iron manhole covers out of the covers, which covers their quality would involve the issue of the rate of the ball. Treatment is anti-rust paint castings used asphalt paint, of course, ductile iron manhole cover surface is asphalt paint after spraying anti-rust treatment. Ductile iron manhole covers have the advantage that due to the high ductile strength, good toughness, making ductile than covers the same type of gray cast iron manhole covers around 30% lighter. Ductile ductile iron manhole cover is a product obtained spheroidal graphite ductile iron manhole covers five anti-globalization and customized by inoculation, effectively improving the mechanical properties of the five anti-iron manhole covers, especially to improve the ductility and toughness, resulting in more than carbon also high strength steel. Ductile iron is the 1950s developed a high-strength cast iron materials, its overall performance is close to steel, is based on its excellent performance, has been successfully used to cast some of the five anti-stress complex covers quotes, strength , toughness, high wear resistance requirements parts. Shanxi Taigu County Chang foundry is located in the hometown Inoue - Kim Gu treasure. Jinzhong City, Shanxi Taigu State Road 108 ductile iron manhole covers five anti-Hu village malleable Industrial Park, east of long high-speed, high-speed transportation Northern Qi Tongyu convenient and accessible. Five years of anti-chang covers offer _ foundry (certified) _ Taiyuan five anti covers 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.