Cast iron is also more malleable than other metals.OEM grey and ductile iron casting from Chinese factory Further, cast iron products can be integrated into existing systems, thereby minimizing the cost of replacement.
Using cast iron in industries can eliminate unnecessary replacement. It requires little or no maintenance for a long time coming. Low cost and durability Cast iron saves tons of money in the long term. Hence, it can be used in a number of industries for manufacturing numerous products. The properties of a metal like hardness, tensile strength and microstructure alter its machinability. Machinability Cast iron can be easily machined into final products. The cost of production and the minimal usage of tools make it a viable manufacturing material. The cast iron can be molded into various shapes and sizes based on the industrial needs. It has a low melting point and greater fluidity.Ĭastability Cast iron is used in an array of industries because of the ease of its castability. The strength of cast iron is what makes it a workable material for various industries. They also have higher strength and ductility and are stiffer than pure iron. Strength Cast iron has higher strength at reduced costs. As for the higher grades, grey cast iron can withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block, cylinder liner, piston, gear box, brake wheel, coupling Plate, medium pressure valve, etc. However, its tensile strength and elongation are very low, so only can produce some metal parts with low physical requirements, such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, base, frame, box, knife, bed, bearing seat, table, wheels, cover, pump, valve, pipe, flywheel, motor blocks etc. The grey cast iron has good casting properties, good vibration damping, good wear resistance, good machinability and low notch sensitivity. When alloying elements like magnesium or ceriumare added to pig iron when it is melted, they form ductile cast iron with a different structure compared to other cast irons.
When white cast iron is heated, its properties change and this improved type of cast iron are called as malleable cast iron. White cast iron also has carbide impurities in them.Īdditionally, cast iron can also be classified into malleable and ductile cast iron. White cast iron also contains less amount of silicon than the grey cast iron. White cast iron is harder and so exhibits less machinability than grey cast iron. As grey cast iron has a high amount of silicon in it, it has a graphite structure that brings in characteristics characteristic to the cast iron.
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On the other hand, grey cast iron deflects a crack but at the same time initiates numerous other cracks because of the presence of the graphite structure. White cast iron, when fractured, allows the crack to pass right through the cast product. They are differentiated by the color of the casting when it is fractured. Based on the amount of the alloying elements added, the cast iron can be classified into grey iron or white iron. The main alloying elements added to the cast iron are carbon and silicon. The cast iron’s properties can be manipulated by varying the alloying constituents. Types of cast iron The properties of iron casting can vary according to the alloying elements added.
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