Shenzhen Alu Rapid Prototype Precision Co., Ltd. Industry News Home News When to Use Metal Casting Complex Geometries: For parts with intricate shapes that are difficult to machine or 3D print.Large Parts: Sand casting for oversized components like machinery housings.High Volumes: Die casting for cost-effective mass production.Material Needs: When specific metals (e.g., aluminum, zinc) are required for strength or weight.