Nodular cast iron manhole covers are very common in modern cities。 Now Shandong Ductile cast iron manhole covers manufacturer will popularize the characteristics of nodular cast iron manhole covers, hoping to help everyone!
1。 Good toughness。 The impact value of medium carbon steel is more than 10 times that of gray iron。
2. Strong corrosion resistance. In the spray corrosion test, the corrosion amount in 90 days is only 1/40 of steel pipe and 1/10 of gray iron pipe. The service life is twice as long as that of gray iron pipe and five times as long as that of ordinary steel pipe.
3. Good plasticity. The elongation (> 7/100) is similar to that of high carbon steel, while the elongation of gray iron is zero.
4. High strength. Tensile strength (> 420 MPa) and yield strength (> 300 MPa) are the same as low carbon steel and three times as that of gray iron.
The strength of ductile iron is comparable to that of cast steel. Ductile iron has higher yield strength, the lowest yield strength is 40k, while the yield strength of cast steel is only 36k. In most municipal applications, such as water, brine, steam, etc., the corrosion resistance and oxidation resistance of ductile iron are higher than that of cast steel. The main application areas are municipal roads, highways, communications, power, tap water, residential areas, schools and other parks.
5。 Better anti-theft and safety performance: Ductile iron well cover grate has similar tensile strength and pressure resistance to steel, so it is also known as cast steel。 Compared with the traditional grey cast iron, its elongation is greatly improved, its toughness is good, and it is not easy to be damaged。 It has better anti-theft performance than the ordinary cast iron well cover, and its overall performance is greater than that of the ordinary cast iron well cover。
6。 Noise-free: Because of the patented structure to prevent noise, the cover of the well is silent when passing the car and will not disturb the people any more。
Well, today's wonderful content is introduced here。 If you have any questions, please consult the official website customer service staff of Shandong Ductile Iron Well Cover: http://www。jnwszy。com。