Lost wax investment casting can produce a variety of complex and intricate parts with excellent tolerances. Lost wax investment casting is used to produce parts that require tight tolerances with thinner walls and exceptional surface finishes that require very little after process finishing.
Sand casting can be readily produced in nearly any ferrous or non-ferrous alloy. Some other casting processes will melt and pour super-alloys in a vacuum, but that is not typically done as a sand casting. Some materials cannot be “worked”, and must be produced as a casting. The relatively low cost of tooling makes sand casting a process of choice for lower volume needs. Patterns do wear so the material selected for the pattern (typically wood, plastic, or metal) will depend on the expected usage quantity of the part being produced. Though not necessarily cheaper in the short run, the use of machined (or “patternless”) molds may be a cost-effective option for components with expected lower usage over a longer period of time.
Die casting is the foundry production process thanks to which a metal, such as aluminum, is injected at high pressure into a metal mold and finds its permanent shape. The advantages of aluminum die casting are many, some of which are a consequence of the characteristics of the material. The advantages of aluminum are lightness, resistance to corrosion, thermal and electrical conductivity, workability and recyclability, and are added to the die-casting process, which guarantees further qualities. Some advantages of aluminum die casting concern the final product, others the production process.
Forging refines the grain structure and improves the physical properties of the metal, so that the grain flow can be oriented in the direction of principal stresses encountered in actual use. Physical properties such as strength, ductility, and toughness are much better in a forging than in the base metal.