Understanding the casting shrinkage of various alloys is important to maintain high quality of the final product. Casting shrinkage refers to the percentage reduction in volume of a metal during solidification and cooling. The shrinkage rates of different alloys vary significantly. In this blog, we will give the casting shrinkage of various alloys.
| Types of alloy | Free shrinkage | Hindered contraction |
| Carbon steel & low alloy steel shrinkage percentage | 1. 6 ~ 2.0 | 1. 3 ~ 1. 7 |
| High Cr alloy steel shrinkage percentage | 1. 3 ~ 1. 7 | 1.0 ~ 1. 4 |
| Ferritic austenitic steel shrinkage percentage | 1.8 ~ 2.2 | 1. 5 ~ 1.9 |
| Austenitic steel shrinkage percentage | 2.0 ~ 2.3 | 1.7 ~ 2.0 |
| Gray cast iron shrinkage percentage | 1.0 | 0.9 |
| Nodular cast iron shrinkage percentage | 1.0 | 0.8 |
