Which aluminum alloys are commonly used for die casting parts?
Which aluminum alloys are commonly used for die casting parts?
The most common aluminum die casting alloys used for OEM parts include A380 aluminum die casting, ADC12 aluminum die casting, A356, 360, and B390 aluminum die casting. These alloys are not interchangeable. Each one has a different balance of castability, strength, corrosion behavior, wear resistance, dimensional stability, and finishing compatibility.
For buyers and engineers, alloy selection should start from the function of the part rather than from the alloy name alone. The right material depends on whether the part is a general structural housing, a thin-wall complex shell, a higher-strength component, a corrosion-sensitive part, or a wear-related mechanical part.
1. Common Aluminum Die Casting Alloys and Where They Fit
Aluminum Alloy | Typical Use Direction | Selection Logic |
|---|---|---|
General structural parts, housings, covers, brackets | Good balance of flow performance, strength, and cost | |
Complex housings, thin-wall structures, batch production parts | Strong casting adaptability for complex geometry | |
A356 | Aluminum castings needing stronger structure or heat-treatment potential | Useful where higher structural performance is important |
360 | Parts with higher corrosion or surface-related expectations | Suitable for more specific corrosion-resistance or appearance needs |
Wear-related parts, dimensionally stable parts, high-silicon applications | Chosen for more specific mechanical or wear-focused requirements |
This comparison helps show that aluminum die casting parts are selected by application logic, not just by whichever alloy is most common.
2. A380 Is Often the Default Choice for General OEM Die Cast Parts
A380 aluminum die casting is one of the most widely used choices for general-purpose die cast parts. It is often selected for housings, enclosures, covers, frames, and brackets because it offers a strong overall balance between castability, mechanical usefulness, and commercial practicality.
For many OEM programs, A380 is the starting point when the part needs reliable die casting performance without a highly specialized property target. It is especially useful when the project values a good balance rather than maximizing only one factor.
3. ADC12 / 383 Is Commonly Used for Complex Thin-Wall Parts
ADC12 aluminum die casting, also identified here as 383, is often chosen for complex housings, thinner-wall structures, and repeated batch production parts. It is widely used when the design includes more complicated shapes and the project needs stable casting performance across many parts.
For buyers evaluating complex aluminum housings or detailed shells, ADC12 / 383 is often a practical choice because of its strong casting adaptability and suitability for production-efficient geometry.
4. A356 Is More Suitable When Higher Structural Performance Is Needed
A356 is often considered when the part has stronger mechanical expectations or when the project values structural performance more heavily. Compared with more general die casting alloys, A356 is usually discussed when strength, toughness, or heat-treatment potential becomes more important in the material decision.
This makes A356 more relevant for aluminum castings that are less about basic enclosure function and more about structure-driven performance.
5. 360 Is Used When Corrosion or Surface Performance Matters More
360 is commonly considered for die cast parts that need a higher level of corrosion-related performance or more specific surface expectations. If the application environment is more demanding, or if the final part must support a more refined corrosion or finish requirement, 360 may be a better fit than a purely general-purpose alloy.
That is why 360 is often selected based on application condition rather than only on casting convenience.
6. B390 Is Better for Wear-Related or Specialized Mechanical Needs
B390 aluminum die casting is typically considered for more specialized applications where wear resistance, dimensional stability, or high-silicon alloy behavior matters. It is not usually the first choice for general housings or brackets, but it becomes more relevant when the project has specific mechanical performance priorities.
For engineers comparing material routes, B390 is usually selected because of what the part must do in service, not because it is a general replacement for A380 or ADC12 / 383.
7. Alloy Selection Should Follow Part Requirements, Not Material Name Alone
In real RFQ and design review, alloy selection should be connected to the part’s actual manufacturing and service conditions. The same geometry may need a different alloy depending on wall thickness, load, corrosion environment, heat management expectations, finish requirements, or machining scope.
Selection Factor | Why It Matters |
|---|---|
Part size | Affects how the alloy works with the casting route and structure |
Wall thickness | Influences fill behavior and stability in production |
Load condition | Helps determine whether higher structural performance is needed |
Thermal management | Important for housings and heat-related product design |
Surface finish | Some alloys are chosen partly for corrosion or finish-related needs |
Post-machining requirement | The final route may depend on how much CNC refinement is needed |
For this reason, buyers should avoid choosing alloy by familiarity alone. The better method is to match the material to the part’s manufacturing logic and functional priorities.
8. Summary
The most common aluminum die casting alloys include A380 aluminum die casting, ADC12 aluminum die casting, A356, 360, and B390 aluminum die casting. A380 is often used for balanced general-purpose parts, ADC12 / 383 for complex thin-wall production parts, A356 for stronger structural needs, 360 for more corrosion- or surface-focused requirements, and B390 for specialized wear-related applications.
In short, alloy selection should not be based only on material name. It should be based on part size, wall thickness, load, thermal needs, finish requirements, and post-machining expectations.
