Advantages of Zinc Metal Castings

22 Jan 2024

ZA12 and ZA5 Castings

Batesville Products is one of the few foundries in the US that cast both aluminum and zinc in the permanent mold process.

There are 4 advantages of zinc metal castings.

fire truck sirens

1. High strength-to-weight ratio

Zinc is almost double the weight of aluminum. For example, we use zinc to cast chair bases, where a counterweight is required.

As you add aluminum to the zinc alloy (ZA12 being 12% aluminum, ZA5 being 5% aluminum), you increase the strength. ZA12 has similar mechanical properties to a class 30 gray iron.

2. Corrosion resistance

Similar to aluminum, zinc has natural corrosion resistance, making it an ideal material for outdoor applications or those exposed to harsh environments.

3. Surface finish

Unlike aluminum, zinc can more easily be chrome plated or mirror buffed. Zinc is an ideal material choice if you’re looking for a high-sheen surface finish.

Because of its high-quality surface finish, zinc is common on fire trucks or decorative fixtures.

4. Excellent castability

Zinc has a low melting point. Therefore, it’s more energy efficient to cast zinc than iron.

It has excellent fluidity and can fill intricate mold cavities without the need for additional processes. Zinc permanent mold castings are complex with tight tolerances!

Zinc vs. Aluminum

Zinc and aluminum are both excellent materials for metal casting. When deciding between zinc and aluminum metal castings, consider factors such as strength, weight, surface finish, and cost.

Each casting is custom. Ultimately, the material you choose will depend on your specific application requirements.


Not sure which material is right for you? Talk to our casting experts and we’ll point you in the right direction!

It never hurts to check

Request a quote and a Batesville team member will be in touch to discuss your metalcasting goals and how our metalcasting experts can help make your next project a success.