Profile: Ningbo Zhenhai Xinxie Machinery Co.,Ltd specializes in providing investment casting and die casting services. We are an ISO 9001:2000 certified company. Aluminum die casting is similar to permanent mold castings except that the metal is injected into the mold under high pressure of 10-210 Mpa (1,450-30,500) psi. This results in a more uniform part, generally good surface finish and good dimensional accuracy, as good as 0.2% of casting dimension. For many parts, post-machining can be totally eliminated, or very light machining may be required to bring dimensions to size. Die-casting can be done using a cold chamber or hot chamber process. Die casting molds (called dies in the industry) tend to be expensive as they are made from hardened steel-also the cycle time for building these tend to be long. Also the stronger and harder metals such as iron and steel cannot be die-casted.