413 (A413)
Eutectic aluminum-silicon alloy (~12% Si), maximum possible fluidity for complex geometry parts and ultra-thin walls.
413 (AlSi12) is the eutectic alloy of the Al-Si system with ~12% silicon, giving it the highest fluidity of all aluminum casting alloys. With no copper content, it offers excellent corrosion resistance. Ideal for very thin-walled parts, pressure-tight components, and applications where fluidity is critical.
International Nomenclature
| Standard | Designation |
|---|---|
| AA (USA) | 413.0 / A413.0 |
| EN (Europa) | EN AC-44100 · AlSi12(Fe) / EN AC-44200 · AlSi12 |
| DIN (Alemania) | G-AlSi12 / 3.2581 |
| JIS (Japón) | ADC1 |
| ISO | AlSi12 |
Chemical Composition
| Element | Symbol | Percentage |
|---|---|---|
| Aluminum | Al | Balance |
| Silicon | Si | 11.0–13.0% |
| Iron | Fe | ≤2.00% (413) · ≤1.30% (A413) |
| Copper | Cu | ≤1.00% (413) · ≤0.10% (A413) |
| Magnesium | Mg | ≤0.10% |
| Manganese | Mn | ≤0.35% |
| Zinc | Zn | ≤0.50% |
| Nickel | Ni | ≤0.50% |
Physical Properties
| Property | Value |
|---|---|
| Density | 2.66 g/cm³ |
| Melting Range | 574–582 °C |
| Thermal Conductivity | 121 W/m·K |
| Electrical Conductivity | ~31% IACS |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (UTS) | 290–310 MPa |
| Yield Strength | 130–150 MPa |
| Elongation | 2.5–3.5% |
| Hardness | ~80 HB |
Key Characteristics
- Eutectic composition (~12% Si) provides maximum fluidity among all Al-Si alloys
- No copper: excellent corrosion resistance in aggressive environments
- Ideal for ultra-thin wall parts and complex geometries
- Excellent pressure tightness for hydraulic and pneumatic components
- Narrow melting range (574–582°C) facilitates solidification control
Industries & Applications
Automotive
Transmission housings, engine components, pressure-tight parts, heat sinks
Hydraulics / Pneumatics
Valve bodies, manifolds, components requiring pressure tightness
Electrical
Junction boxes, motor housings, heat sinks
Special Notes
413 is the natural eutectic alloy of the aluminum-silicon system. Our AlSi11 closely resembles the 413 composition. The A413 version with low iron and no copper is ideal when maximum corrosion resistance is required. Equivalent to Japanese ADC1 and European AlSi12.
Need 413 (A413)?
We manufacture this alloy in ingots, donuts, and bars to your exact specifications.