Calmet produces iron castings for global markets including automotive industry. We are the leading iron casting manufacturers and suppliers. Calmet iron casting products are known for its quality Steel castings are used in the agricultural, construction, manufacturing, power generation, processing, and transportation industries. Like all foundries, steel casting foundry is a flow line production system in which the sequence of operations is fixed and the workflow is in a single direction. The main manufacturing process of steel casting foundry includes pre-casting stage, casting stage, and post casting stage. The heat treatment process is a crucial factor in steel casting. Steel casting foundry differs from iron foundries in the nature of the sand used in all the molds being dried very hard and in the flasks or molding boxes having fewer bars than those used in iron foundries. In the steel casting foundry most steel castings are made in the open – hearth furnaces, by which it is possible to obtain a more controllable product, and in larger quantities. Steel can be melted in a crucible in an ordinary brass furnace by increasing the height of the chimney to get a sharper draught. All steel has to be poured at a much higher temperature than iron. It, therefore, contracts more, the hotter it is poured the more it shrinks. The shrinkage in steel castings is far from uniform, and it is, therefore, necessary to allow a larger margin on machining on important surfaces and in cored holes than in the case of iron.
