AlSi11Cu2 (A383)
High-silicon, copper-bearing alloy, the most widely used aluminum die casting alloy worldwide.
AlSi11Cu2 (known as A383 in the USA or ADC12 in Japan) is the most widely used die casting alloy in the world. Its high silicon content (~11%) combined with copper provides exceptional fluidity, good mechanical strength, and excellent machinability. It is the automotive industry standard for die cast parts.
International Nomenclature
| Standard | Designation |
|---|---|
| AA (USA) | A383.0 / 383.0 |
| EN (Europa) | EN AC-46000 · AlSi9Cu3(Fe) / EN AC-46500 · AlSi11Cu2(Fe) |
| DIN (Alemania) | G-AlSi11Cu / 3.2163 |
| JIS (Japón) | ADC12 |
| ISO | AlSi11Cu2 |
Chemical Composition
| Element | Symbol | Percentage |
|---|---|---|
| Aluminum | Al | Balance |
| Silicon | Si | 9.5–11.5% |
| Copper | Cu | 1.5–3.5% |
| Iron | Fe | ≤1.00% |
| Magnesium | Mg | ≤0.30% |
| Manganese | Mn | ≤0.50% |
| Zinc | Zn | ≤1.00% |
| Nickel | Ni | ≤0.30% |
Physical Properties
| Property | Value |
|---|---|
| Density | 2.74 g/cm³ |
| Melting Range | 516–582 °C |
| Thermal Conductivity | 96 W/m·K |
| Electrical Conductivity | ~23% IACS |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (UTS) | 310–330 MPa |
| Yield Strength | 150–170 MPa |
| Elongation | 2–4% |
| Hardness | ~85 HB |
Key Characteristics
- The most widely used die casting alloy in the world (ADC12/A383)
- Exceptional fluidity for thin-wall die cast parts
- Copper improves mechanical strength and machinability
- Excellent dimensional reproducibility in high-pressure die casting
- Its tolerance for higher iron levels makes it compatible with secondary aluminum
Industries & Applications
Automotive
Transmission cases, engine covers, brackets, alternator housings, general die cast parts
Electronics
Heat sinks, device housings, laptop and tablet frames
Appliances
Power tool housings, small motor components
Telecom
Equipment housings, enclosures, connectors
Special Notes
Known as ADC12 (Japanese JIS standard), A383 (American AA), or AlSi11Cu2 (European), this is the global standard die casting alloy. Our AlSi11 closely resembles a 413 (AlSi12) composition when formulated without copper. We also manufacture 380-type alloys with higher copper content. Its tolerance for higher iron levels makes it compatible with secondary aluminum.
Need AlSi11Cu2 (A383)?
We manufacture this alloy in ingots, donuts, and bars to your exact specifications.