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1. High StrengthTensile Strength: Ductile iron manhole covers exhibit high tensile strength, typically reaching or exceeding 420 MPa. This is attributed to the unique spherical graphite structure that enhances the mechanical properties of the material. Such high strength allows the
Chemical CompositionDuctile iron manhole covers are primarily composed of ductile iron, which typically includes the following elements:- Carbon (C): The carbon content ranges from 3.0% to 4.0%, though some standards suggest a narrower range of 3.6% to 3.8%. Carbon is the principal element in
1.Product OverviewThe composite manhole cover is manufactured using high-temperature and high-pressure one-time compression molding technology. It is composed of a polymer matrix material reinforced with additional materials and fillers through a precise compounding process. These manhole cove
In the rapidly developing modern city, every piece of infrastructure bears the important mission of ensuring public welfare and promoting development. Among these, ductile iron manhole covers, with their excellent performance and wide application, are gradually becoming an indispensable part of urba
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