Compared to other casting, the wear-resistant steel castings shrinkage is very unique, is the main obstacle to its shrink by more, whether it is mold, core or casting structure itself, are likely to generate resistance to impede resistance steel castings heat shrinkage. Related tests also proved to be the size of the casting shrinkage will vary with different levels of complexity casting size, wall thickness and structure, but also reflected in the respective directions of the casting.

Because of this, wear-resistant steel castings are generally difficult to process, making it basically not processed directly using the assembly. In order to avoid casting size, flatness deviation will affect the accuracy of the assembly, or to try to accurately control the amount of shrinkage casting, casting can guarantee compliance with the requirements.
In general, wear-resistant steel castings sand casting shrinkage under the conditions of 2.6% a 2.7%, but it will change, such as the wall thickness of the casting, mold material lose strength after heat shrinkage of the casting resistance is reduced, resulting in greater shrinkage.