Gravity Die Casting | AlSi5Cu3 Aluminum Casting Foundry

Gravity Die Casting is the Leesh key manufacturing process for producing high-quality aluminum components. For the AlSi5Cu3 (EN AC-45400) alloy, this method is the perfect process for complex Automotive Components like cylinder heads and engine housings. By relying on natural gravitational force rather than high-pressure injection, the process ensures a more uniform Solidification Rate, resulting in a dense and reliable internal structure.

Also known as Permanent Mold Casting, this technique uses reusable steel or iron molds to achieve higher tolerances and smoother surface finishes than traditional sand casting. The high silicon content in AlSi5Cu3 provides excellent Castability, allowing the molten metal to flow seamlessly into intricate mold geometries. To ensure the highest quality, our process includes Degassing and Fluxing steps to eliminate hydrogen gas and non-metallic inclusions before the pour.

To unlock the full potential of AlSi5Cu3, our castings always take T6 Heat Treatment. This thermal process—consisting of solutionizing and artificial aging—transforms the microstructure by managing Intermetallic Phases. This results in a significant boost to the material’s Tensile Strength (UTS) and hardness. Whether you require lightweight solutions or heavy-duty industrial parts, our gravity-fed processes deliver the precision and strength your project demands.