Choosing between aluminum and zinc die casting directly impacts part cost, tooling life, precision, and supply chain strategy. This concise guide helps CEOs and procurement leaders make an informed decision, introduces Stick Industry as a dual-alloy manufacturer, and provides key technical reference charts.
1. Zinc Die Casting: Benefits and Industry Uses
Zinc’s exceptional fluidity allows it to fill intricate molds with wall sections as thin as 0.6 mm. It achieves as-cast tolerances of ±0.02 mm—up to five times tighter than aluminum—making it ideal for precision components. Zinc alloys such as Zamak 3 deliver ~280 MPa tensile strength and Zamak 5 reaches ~330 MPa without heat treatment. These mechanical properties are the highest among standard die casting alloys.
Low melting temperatures (~381–387 °C) extend tool life beyond 500,000 shots and enable fast hot-chamber cycle times of 4–5 shots per minute. Zinc also accepts chrome, nickel, and paint finishes with minimal surface preparation.
Typical applications: automotive lock mechanisms, sanitary fittings, door/window hardware, electronic connectors, medical devices, and industrial gear housings.
2. Aluminum Die Casting: Benefits and Industry Uses
Aluminum’s density of 2.7 g/cm³ makes it the material of choice where weight reduction is critical. Alloys like A380 provide ~310 MPa tensile strength with excellent strength-to-weight ratio. Aluminum naturally resists corrosion, performs well at elevated temperatures, and offers high thermal conductivity for heat sinks and power electronics.
The cold-chamber process handles larger structural parts with wall thicknesses from 1.5 mm upward. Aluminum is near-infinitely recyclable, aligning with ESG goals.
Typical applications: engine blocks, EV battery trays, aerospace brackets, medical housings, LED luminaires, and industrial pumps.
3. Stick Industry: Your Integrated Zinc & Aluminum Die Casting Manufacturer
Stick Industry operates ISO 9001-certified factories in Xiamen, China, and Hanoi, Vietnam, both meeting CE requirements. We provide a full in-house ecosystem: zinc hot-chamber and aluminum cold-chamber die casting, gravity casting, CNC machining, PVD surface treatment, automated and manual polishing, liquid and powder coating, electroplating, and complete laboratory testing.
Our production meets German, Japanese, European, and U.S. quality standards, trusted by customers in automotive, sanitary, lock/hardware, medical, and industrial sectors. The dual-location setup offers tariff flexibility, supply chain resilience, and competitive cost structures.
4. Professional Reference Charts
Chart 1: Alloys Processed by Stick Industry
| Alloy | Grade | Process |
|---|---|---|
| Zinc | Zamak 3 | Hot Chamber |
| Zinc | Zamak 5 | Hot Chamber |
| Zinc | ZA-8 / ZA-12 | Hot Chamber / Cold Chamber |
| Aluminum | A380, ADC12 | Cold Chamber |
| Aluminum | A360 | Cold Chamber |
| Aluminum | A356 | Gravity Casting |
Chart 2: Chemical Composition (Key Elements)
| Alloy | Al (%) | Cu (%) | Mg (%) | Zn |
|---|---|---|---|---|
| Zamak 3 | 3.5–4.3 | ≤0.25 | 0.02–0.05 | Balance |
| Zamak 5 | 3.5–4.3 | 0.75–1.25 | 0.03–0.08 | Balance |
| A380 | Balance (Si 7.5–9.5) | 3.0–4.0 | ≤0.10 | ≤3.0 |
| A360 | Balance (Si 9.0–10.0) | ≤0.60 | 0.40–0.60 | ≤0.50 |
Chart 3: Casting Characteristics
| Feature | Zinc (Zamak) | Aluminum (A380) |
|---|---|---|
| Melting Range | 381–387 °C | 538–593 °C |
| Process Type | Hot Chamber | Cold Chamber |
| As-Cast Tolerance | ±0.02 mm | ±0.10 mm |
| Typical Tool Life | >500,000 shots | ~100,000–150,000 shots |
| Min. Wall Thickness | 0.6 mm | 1.5 mm |
Chart 4: Density & Mold Shrinkage
| Alloy | Density (g/cm³) | Shrinkage (%) |
|---|---|---|
| Zamak 3/5 | 6.6 | 0.5–0.7 |
| ZA-8 | 6.3 | 0.6–0.8 |
| A380/ADC12 | 2.7 | 1.1–1.3 |
Chart 5: International Grade Cross-Reference
| China (GB) | Japan (JIS) | U.S. (ASTM) | Europe (EN) | Family |
|---|---|---|---|---|
| YZZnAl4A | ZDC1 | Zamak 3 | EN 1774 ZnAl4 | Zinc |
| YZZnAl4Cu1 | ZDC2 | Zamak 5 | EN 1774 ZnAl4Cu1 | Zinc |
| YL112 | ADC10 | A380 | EN 1706 AlSi9Cu3(Fe) | Aluminum |
| YL113 | ADC12 | A383 | EN 1706 AlSi11Cu2(Fe) | Aluminum |
Finding a reliable zamak-aluminum alloy factory is crucial for long-term stable cooperation and development. Reliable product quality can reduce brand influence and customer complaint rates. We have our own quality control department with a rate exceeding 95%, serving high-end brand clients. If you are a zinc-aluminum alloy manufacturer seeking high quality and cost-effectiveness, STICK IDNSUTRY is one of your best choices! If you are looking for a manufacturing solution that avoids tariffs and offers low costs, SITKC INDUSTRY is also one of your best options!
Start your next project with a partner that masters both materials. Contact our engineering STICK INDUSTRY team for a tailored manufacturing proposal.