Zamak 7

Zamak 7 is a high-purity zinc-aluminum alloy developed from Zamak 3 with tighter impurity control and adjusted magnesium content. It offers excellent fluidity, ductility, and die-casting performance, making it particularly suitable for thin-wall, complex, and high-surface-quality precision die-cast components.

Appearance & Properties

Color: Silver-gray to bright silver-gray

Density: Approx. 6.6 g/cm³

Tensile Strength: Approx. 280 MPa, depending on condition and manufacturing process

Corrosion Resistance: Moderate to Good

Machinability: Good

Die Castability: Excellent

Fluidity: Excellent

Ductility: Excellent

Magnetism: Non-magnetic

Surface Finishes: Polishing, electroplating, painting, powder coating, passivation, etc.

Typical Applications

Zamak 7 is widely used in electrical and electronics, automotive, consumer electronics, home appliances, precision hardware, and decorative components.

Typical parts include thin-wall housings, connector housings, precision brackets, handles, knobs, decorative parts, electronic equipment structures, and complex precision die-cast components.

Advantages

• Excellent die-casting fluidity

• Good ductility

• Particularly suitable for complex and thin-wall components

• Excellent surface quality for plating and decorative finishes

• Capable of achieving high dimensional accuracy

Limitations

• Lower strength and hardness than Zamak 2 and Zamak 5

• Not suitable for prolonged high-temperature service

• Relatively high density for lightweight applications

• Requires good control of material purity and die-casting conditions