The definition of a mold insert is a piece of material that is placed in a pocket of a larger piece of material or plate. Inserts can be almost any shape and made from many materials. The following are the most common materials we use for inserts.

Aluminum is lightweight and moderately strong. It is very machinable. It's also a good conductor of heat. It offers good resistance to chemicals because a corrosion-resistant oxidation naturally forms on its surface.

Aluminum Bronze is the most common alloy in the cast bronze family. Used in many heavy duty applications, it is recommended for high load, high wear applications that require tensile strength or exceptional resistance to fatigue and deformation in overload situations. In addition to good anti-frictional characteristics, the metal also exhibits corrosion and chemicals resistance.

Tool steel is a type of carbon alloy steel that is well-matched for mold manufacturing. Its hardness, resistance to abrasion and ability to retain shape at increased temperatures are the key properties of this material. Tool steel is typically used in a heat treated condition which provides increased hardness. The most common tool steels we use are A-2, H-13 and 420 stainless steel.