Part of the Thomas Dudley Group

Selecting The Correct Casting Material

Selecting the Right Casting Material - Zinc Foundry

Primary materials that are widely used in die casting include zinc, aluminium and magnesium. It is important when deciding on which material to use, to carefully consider the application along with the required strength and surface finish of the component.


Zinc

The best choice for thin walled castings and for manufacturing to tight tolerances
Recognised as offering the greatest mouldability
A heavy material that can give additional perceived quality
Ideal for a wide range of casting sizes even very small, highly detailed parts
Range of alloys available offering different costs, mouldability and performance
Lower melting point and better fluidity
High strength and corrosion resistant
Smoothest surface finish

Three commonly used zinc grades are Z2, Z3 and Z5 with Z3 covering the vast majority of applications.

PROPERTYZ2 – Zamak 2Z3 – Zamak 3Z5 – Zamak 5
Tensile Strength397 MPa268 MPa331 MPa
Yield Strength361 MPa208 MPa295 MPa
Impact Strength38J46J52J
Shear Strength317 MPa214 MPa262 MPa
Density6,800 Kg per cbm 6,700 Kg per cbm 7,700 Kg per cbm
Hardness130 Brinell97 Brinell91 Brinell
Thermal Conductivity105 W/mK113 W/mK109 W/mK

Aluminium

The most commonly used diecasting material
Lightweight
Strong
High strength and corrosion resistant
Range of alloys available offering different costs, mouldability and performance
Easy to machine
Cost effective

Magnesium

Very lightweight
Strong
Excellent corrosion and temperature resistance
Range of alloys available offering different costs, mouldability and performance
Easy to machine
Quicker ejection rate than aluminium

MDL understands what it takes to produce components with an exceptional surface finish.

We also have the expertise to produce zinc die cast components that will flawlessly accept powder coating, wet paint coating, chrome plating, copper plating and other finishes. Finally, our attention to detail is unsurpassed and dictates the way in which every product is lovingly hand finished and assembled.