Square Manhole Cover of Ductile Iron

Product parameters: made of ductile iron, with tensile strength of 500-1100 N/mm

The elongation is 2-15%, meeting the requirements of national standard QT500-7 and European standard GGG40-50

Spheroidization rate is more than 90%, phosphorus content is less than 0.08, and sulfur content is less than 0.05

Applications: municipal road construction

         Water supply, drainage, rainwater and sewage

         Electric power, street lamp, China Telecom, China Netcom

         China Mobile, China Unicom, cable TV

         Traffic, signal, military cable

         Heat supply, gas supply, natural gas pipeline and oil pipeline

         Airport, wharf, port, garden and real estate

Executive standard: China National Quality Standard: GB / T23858-2009

          Spheroidal graphite iron castings GB/T1348-2009

Product features: safety, anti-theft, anti-skid, anti-rust, anti-bounce

          Anti-settlement, sound-proof, explosion-proof and anti-displacement