Surface finish quality, surface smoothness/roughness of cast iron and cast steel

In this article, we will try to show some photos for casting surface qualities, finish smoothness or roughness of lost wax investment castings, shell molding, automatic molding, resin sand, and manual green sand casting processes. So, you could understand how about the surface finish quality our factory can reach to. 

Surface Finish Capabilities by Sand Casting Processes

Surface quality and smoothness of iron and steel castings

The following photos are showing some gray iron, ductile iron and cast steel castings made by our Dandong Hengrui foundry.

1.  Manual green sand, cast iron castings

traditional casting process, the surface quality is difficult to control. Sometimes, good, sometimes, very poor.

2.  Resin sand, cast iron castings

Comparatively good for large iron castings, but not suitable for producing small iron castings because of high production cost.

3.  Automatic molding, green sand, cast iron castings

Surface quality is not the best, but quality is very stable. Clients like it.

4.  Shell molding castings, cast iron castings

It could produce better surface quality than automatic molding, but sometimes not stable.

5.  Lost wax castings, water glass, steel castings, investment castings

The surface quality is much better than steel castings made by sand casting process.

6.  Lost wax investment castings, silica sol, steel castings 

The surface quality is very good, but its price is about 3 times of water glass investment casting process. Very expensive.

7.  Die casting, aluminum and zinc castings 

The surface quality is perfect, but this process is only suitable for making aluminum and zinc castings, not suitable for producing iron and steel castings.

cast iron, cast steel, sand casting, investment casting, silica sol casting, water glass casting, shell mold casting, lost wax casting