MECHANISM MANHOLE COVER

Material: Ductile iron

Product points：

The ductile iron manhole cover is mainly cast from ductile iron. The quality of the manhole cover depends on the technological process of the spheroidization rate. The common coatings used to treat the surface of the filled iron and the cover and meet the requirements of anti-weathering and aging. The advantage of the ductile iron manhole cover is that due to the high strength and good toughness of ductile iron, the ductile iron manhole cover is about 30% lighter than the same type of gray cast iron manhole cover.

Good resilience:The impact value is similar to that of medium-carbon steel and is more than 10 times that of gray iron materials.

strong corrosion resistance:In the spray water corrosion test, the quarterly corrosion amount is only 1/40 of that of the steel pipe and 1/10 of that of the gray cast iron pipe. The service life is twice that of the gray cast iron pipe and five times that of the ordinary steel pipe.

Good plasticity:The elongation is ≥79%, which is similar to that of high-carbon steel, while the elongation of gray iron material is zero.

Due to the spherical graphite microstructure of ductile iron, ductile iron is superior to cast steel in terms of weakening the vibration ability, and is therefore more conducive to reducing stress. An important reason for choosing ductile iron is that ductile iron has a lower cost than cast steel. The low cost of ductile iron makes this material more popular, with higher casting efficiency and also reduces the machining cost of ductile iron. 

The strength of ductile iron is comparable to that of cast steel. Ductile iron has a higher yield strength, with a minimum yield strength of 40k, while the yield strength of cast steel is only 36k. In municipal application fields, such as water, salt water, steam, etc., the corrosion resistance and oxidation resistance of ductile iron exceed those of cast steel.

Coating：

Spray anti-rust asphalt paint.

Application fields：

It is widely used in municipal, gardens, parking lots, highways, docks, power plants, boiler factories, airports, landscape roads in residential areas, urban sidewalks, motor vehicle lanes, squares, lawns and flower ponds and other projects such as water supply, drainage, sewage discharge, communication, electricity, natural gas, etc