Sand Casting

Black Sand Casting

Black Sand Casting entails pushing a shape into two parts of sand, that are then stacked and filled with liquid metal. This is usually done for iron (due to the carbon content), but also possibly steel, and even materials like aluminium and copper. The melting point of a material is no issue with this technique.


Best suited for: Parts that deal with high thermal loads, such as brake drums for cars. 

Yellow Sand Casting

A sand mold is baked within a regular mold. This “cake shape” is then filled with liquid metal.

Best suited for: High quality materials, such as steel alloys, particularly in larger series. An example are the teeth of trenchers.

Lost Foam Casting

Comparable to Black Sand Casting, but the hollow mold is not produced by pushing the shape into sand, but by putting a preformed polystyrene (tempex) shape in it. This tempex model melts off when the liquid metal is poured in. Polystyrene leaves a lot of carbon, making this method less suitable for the pouring of steel.