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Brass Investment Casting ProcessAlmost any castable metal can be investment cast. The brass investment casting process is suitable for parts ranging from a few grams to several hundred pounds; however, most parts weigh 15 pounds or less. The first step in investment casting is to create a master mold from wax. This wax pattern can be engraved by hand or machine, and can also be produced by injection molding. A mold is an exact replica of the part to be produced. It is attached to a wax stick called a gate. Hundreds of wax molds can b... more