Many parts can be made utilizing multiple casting processes, including both investment casting and sand casting. Consider these characteristics of each process when deciding which is best for a specific application:
- Investment casting can achieve very thin walled parts with complex shapes.
- Very accurate, with precise dimensional casting – near-net-shape.
- Excellent surface finishes and precise details save machining and finishing.
- Ferrous and nonferrous metals, as well as duplex alloys, can be used.
- Investment casting can be quite economical over repeat runs.
- Sand casting can be lower cost particularly in shorter runs.
- It can accommodate large castings.
- Sand casting can also utilize both ferrous and non-ferrous metals.
- The cost for post-casting tooling can be lower.
A trade-off for the sometimes lower cost of sand casting is overall lower quality, less accuracy and rougher surface finishes. The right choice depends on your specific needs.