What is the main benefit of Investment Casting over Sand Casting?
Investment casting (lost-wax) provides vastly superior dimensional accuracy (±0.005 in/in) and a smoother surface finish (125 RMS), making it ideal for intricate geometries, thin walls, and hard-to-machine superalloys where minimizing secondary machining is critical. Sand casting is better suited for larger, heavier parts where lower tooling costs and high volume outweigh tight as-cast tolerances.