ZA-27 Zinc-Aluminum Alloy

ZA-27 is a high-aluminum, high-strength zinc-aluminum alloy containing approximately 25–28% aluminum with smaller additions of copper and magnesium. Compared with ZA-8 and ZA-12, it provides higher strength, hardness, and wear resistance while offering lower density, making it suitable for heavily loaded and wear-resistant mechanical components.

Appearance & Properties

Color: Silver-gray to grayish white

Density: Approx. 5.0 g/cm³

Tensile Strength: Approx. 400–450 MPa, depending on material condition and casting process

Corrosion Resistance: Good

Machinability: Good

Wear Resistance: Excellent

Strength: High

Hardness: High

Load-Bearing Capability: Excellent

Magnetism: Non-magnetic

Surface Finishes: Polishing, painting, powder coating, plating, etc.

Typical Applications

ZA-27 is widely used in automotive, industrial machinery, construction equipment, agricultural machinery, and power transmission systems.

Typical parts include gears, bearings, sleeves, bushings, pulleys, guides, mechanical brackets, and various high-load wear-resistant cast and CNC-machined components.

Advantages

• Very high strength and hardness within the ZA alloy family

• Excellent wear resistance and load-bearing capability

• Lower density than ZA-8 and ZA-12

• Good machinability

• Can replace some bronze, cast-iron, and steel wear components

Limitations

• Lower ductility than lower-aluminum zinc alloys

• Not suitable for prolonged high-temperature service

• Requires careful control of casting temperature and process

• High aluminum content limits the use of conventional hot-chamber die casting