lv520xin71 skrev en oppdatering for 2 uker, 6 dager siden
We supply round drain covers grates.
Founded in 1993, located in Changsha City China, we devoted ourselves to casting foudnry industry for many years,has been exporting to Europe and Australia since 2001.
We are expecting become your long team partner, OEM & OED is welcomed.
MaterialDuctile Iron or Cast Iron
Applicationconstruction, public road, water supply, Municipal, drainage system etc
Brand NameCastKing or OEM
Place of OriginChina (Mainland)
Colorblack, grey, etc
Loading PressureA15, B125, C250, D400, E600, F900
Coatingblack bitumen coated,epoxy painting
PackageIron pallet and wooden case, or as per customers’ requirements.
Process of cast iron
Cast iron tends to be brittle, with the exception of malleable cast iron. With its relatively low melting point, good fluidity, melting capacity, excellent machinability, resistance to deformation and wear resistance, castings have become an engineering material with a wide range of applications and are used in pipes, machines and parts of the automotive industry, such as cylinder heads (decreasing use), cylinder blocks and gearboxes (decreasing use). It is resistant to destruction and weakening by oxidation.
Cast iron is made of cast iron, which is the product of iron ore smelting in a blast furnace. Cast iron can be manufactured directly from molten pig iron or by melting it again , often together with substantial amounts of iron, steel, limestone, carbon (coke) and taking various measures to eliminate undesirable contaminants. Phosphorus and sulfur can be burned from molten iron, but this also burns carbon, which must be replaced. Depending on the application, the carbon and silicon content is adjusted to the desired levels, which can be 2 to 3.5% and 1 to 3%, respectively. If desired, then other elements are added to the melt before the final shape is produced by casting. 
Cast iron sometimes melts into a special type of blast furnace known as a dome, but in modern applications, it melts more often in electric induction furnaces or electric arc furnaces.  Once the melting is completed, the molten iron is poured into an oven or holding bucket.
The gray cast iron is characterized by its graphitic microstructure, which makes the fractures of the material look gray. It is the most commonly used cast iron and the most used casting material based on weight. Most molten irons have a chemical composition of 2.5-4.0% carbon, 1-3% silicon and the rest of iron. Gray cast iron has less tensile and impact strength than steel, but its compressive strength is comparable to that of low and medium carbon steel. These mechanical properties are controlled by the size and shape of the graphite flakes present in the microstructure and can be characterized according to the guidelines given by the ASTM.
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