Shrinking Percentage of Steel Castings China

Shrinkage is the common issues for steel castings in China. The shrinking percentage of steel castings in China investment casting foundry is around 1.3%~2.0%.

Shrinking percentage of steel castings contains line shrinkage and volume shrinkage. 

1. Line shrinkage is the percentage between shrinken length of steel casting cooling from solidation to room temperature and the length of cold steel castings. Computational formula is Line shrinkage E=（ L（mold）-L(casting））/L（casting）*100%

2.Volume shrinkage is percentage between diference of steel water volume minus volume of solidated castings and the volume of solid castings.  Computational formula is Line shrinkage D=(V1-V2)/V2* 100%.

There're certain rules on shrinking of the steel castings. Known these, we can try to reduce the shrinking percentage by modifying the mold-making and casting systems. Thus to control the quality of the steel castings. These are what we do in our investment casting factory.