ZA-12 Zinc-Aluminum Alloy

ZA-12 is a zinc-aluminum alloy containing approximately 11–12% aluminum. It provides a good balance of strength, hardness, wear resistance, and castability. Compared with ZA-8, it generally offers higher strength and load-bearing capability while maintaining good machinability.

Appearance & Properties

Color: Silver-gray to bright silver-gray

Density: Approx. 6.0 g/cm³

Tensile Strength: Approx. 400 MPa, depending on material condition and casting process

Corrosion Resistance: Good

Machinability: Good

Castability: Excellent

Wear Resistance: Good

Strength: High

Magnetism: Non-magnetic

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

Typical Applications

ZA-12 is widely used in automotive, industrial machinery, agricultural equipment, hardware, power transmission, and general mechanical applications.

Typical parts include gears, bearing housings, bushings, pulleys, brackets, mechanical housings, connectors, and various wear-resistant precision cast and CNC-machined components.

Advantages

• Higher strength and load-bearing capability than ZA-8

• Good wear resistance

• Good machinability

• Excellent casting characteristics

• Suitable for medium-to-high-load mechanical components

Limitations

• Relatively high density for lightweight applications

• Not suitable for prolonged high-temperature service

• Generally more expensive than common Zamak alloys

• Die-casting process options are less flexible than lower-aluminum Zamak alloys