Stainless steel has much better physical properties than iron and normal steel, but it possesses worse casting properties. Because stainless steel has a higher melting temperature point, in its liquid form it has worse flowability and a bigger shrinkage ratio, and is easier to be oxidized. To prevent the happening of defects such as cracks, sand sticks, under-pounding, etc., a series of more complicated technics are applied in the casting, thus the success rate of stainless steel casting in China is able to greatly improved. It is also a significant type of investment casting process.
Features of Stainless Steel Castings
Since we offer investment casting services, we would like to introduce to you the features of stainless steel castings.
Take higher metal temperature reaches 1520~1600℃. For the small and complicated structure part keep the pouring temperature to melting point +150℃; for the big and thick wall part keep the pouring temperature to melting point +100℃;
Make bigger and simpler gating tunnels;
Use dry or heated casting mold;
Make sure the casting product wall thickness is as even as possible and over 8mm, optimize the part structure in sharp corners and edges;
Improve air permeability and passing ability by using hollow mold core or oil-sand core, or add coke with it.
Notice of Stainless Steel Castings
For the material used to create the mold shell, similar to the iron casting somehow, the stainless steel casting also uses silica sol and water glass as the adhesive material.