The role of castings in the selection of blanks is the material and mechanical property requirements of the parts, the structural shape and overall dimensions of the parts, and the size of the production program.

When cooling and solidification treatment is carried out by iron casting manufacturers, the shrinkage rate of castings is the most important consideration. Shrinkage refers to the percentage of size reduction of alloy castings during solidification. Shrinkage has an important influence on the precision of castings. Interference factors in casting smelting are generally not so-called harmful factors, but factors that have a negative impact on the normal process of casting production.