It's not difficult to find that many well covers are now chosen by Shandong ductile iron well covers, so what is the reason why such well covers are so popular? It is because Shandong Ductile Iron Well Cover has the following characteristics:
1. 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. Its service life is twice that of grey iron pipe and five times that of ordinary steel pipe.
2。 Good plasticity。 The elongation (> 7%) is similar to that of high carbon steel, while the elongation of gray iron is zero。
3. High strength. Tensile strength B (> 420 MPa) and yield strength s (> 300 MPa) are the same as low carbon steel and three times as that of gray iron.
4. Due to the microstructures of spherical graphite in nodular cast iron, nodular cast iron is better than cast steel in reducing vibration ability, so it is more conducive to reducing stress. An important reason for choosing ductile iron is that the cost of ductile iron is lower than that of cast steel. The low cost of nodular cast iron makes this material more popular and more efficient. It also reduces the processing cost of nodular cast iron.
5。 The strength of ductile iron is comparable to that of cast steel。 Ductile iron has higher yield strength, its yield strength is lower than 40k, while the yield strength of cast steel is only 36k。 In most municipal applications, such as water, brine and steam, the corrosion resistance and oxidation resistance of nodular cast iron are higher than that of cast steel。
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