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, 1/10 gray iron pipe. Life is twice as gray iron pipe diameter cast iron covers Shanxi, is five times that of ordinary steel pipe. Good plasticity. Elongation ≥7%, with similar high-carbon steel production of cast iron manhole covers, Shanxi, and gray iron material elongation zero. Custom cast iron manhole covers, on the choice of Gu Chang in foundry. Gu Chang-year foundry with you introduce ductile covers technical standards:. A ductile iron Manhole covers material diameter sealing range of plus or minus 2 mm, height Manhole covers and with an accuracy of plus or minus 1 mm, with a gap of 3 mm. b. Manhole covers tensile strength greater than 500N / mm, hardness standards HB190-230. Covers pressure to meet the Ministry of Construction CJ / T3012-93 "cast iron manhole covers," the industry standard Shanxi cast iron covers, covers heavy pressure 360KN, light covers 210KN. cT using EPDM rubber ring cast iron covers Shanxi quotes, performance indicators heavy national standard GB-7529-87. d. anti-theft feature is well connected by a fixed shaft and seat covers, on the other side with a pin fixed this method to complete, with a strong anti-theft and anti-cavitation erosion. Shanxi weight cast iron covers, cast iron covers Shanxi, Chang-year foundry provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) strong, credible, in Jinzhong machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang and you work in the foundry into the brilliant, for a better future!