Cast iron known as gray iron and it is one of the famous ferrous alloys for iron and metal industry. In cast iron carbon (c) and silicon (s) are the main element with the amount of 2.1 to 4 wt% and 1 to 3 wt% respectively. Also you can mix Cr, Ni, Mo and Cu according to your requirement.

In India many Investment casting foundry used different ferrous metals such as carbon steel, alloy steel, stainless steel, cast iron for castings which formally known as ferrous castings. But they mostly prefer cast iron with its different compositions including white cast iron, gray cast iron, malleable cast iron, ductile iron etc. See below some basic description for above compositions.

White Cast Iron

White cast iron contains lower silicon and metastable phase cementite, Fe3C rather than graphite. It offers hardness with the rate of toughness. Generally white cast iron classified as cermet. Cast iron is used for structural components manufacturing for good hardness with low cost. Also it used for manufacturing or industrial parts such as slurry pumps, shell liners and lifter bars in ball mills and grinding mills, and the teeth of a backhoe's digging bucket.

Grey Cast Iron

These types of cast iron characterize by its graphitic microstructure and its widely used cast iron based on weight. Cast iron having 2.5 to 4.0% carbon, 1 to 3% silicon so it’s pure iron also contain less tensile strength and shock resistance than ductile iron or malleable iron and its compressive strength is low then carbon steel. Many casting foundries used gray cast iron to manufacturing some general engineering components such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, machine base, frame, box, knife, bed, bearing seat, table, wheels, cover, pump, valve, pipe, flywheel, motor blocks.

Malleable Cast Iron

Its properties are same as mild steel property and it is heat treated iron with carbon alloy which solidifies with graphite free structures means carbon is present in the cementite form (Fe3C). This type of cast irons contains different chemical element composition such as carbon, silicon, manganese, sulfur, phosphorus etc. Also it possesses considerable ductility and toughness.

All of the above cast iron compositions are widely used for making high quality and higher resistive part for industries. Also auto parts manufacturers in India widely used cast iron for making higher strength and corrosion free automotive parts with help of auto component castings.