EN AC-AlSi10Mg
EN AC-43000Versatile aluminum casting alloy with excellent castability and good mechanical properties. THE standard alloy for metal 3D printing (SLM/DMLS/L-PBF) due to its excellent processability with laser powder bed fusion. Also widely used in conventional sand casting and gravity die casting. Si 9-11% provides outstanding fluidity and low shrinkage. Used for automotive structural parts, aerospace components, 3D-printed functional prototypes and series parts, heat exchangers, and complex thin-walled castings.
Chemical composition comparison (wt%)
Side-by-side: EN AC-AlSi10Mg (EN) (EN 1706) vs ASTM
| Element | EN AC-AlSi10Mg (EN) | ASTM | Overlap |
|---|---|---|---|
| Si | 9–11% | — | — |
| Mn | ≤ 0.45% | — | — |
| Cu | ≤ 0.05% | — | — |
| Ti | ≤ 0.15% | — | — |
| Fe | ≤ 0.55% | — | — |
| Mg | 0.2–0.45% | — | — |
Mechanical properties
F
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 150 | MPa |
| Yield Strength | ≥ 80 | MPa |
| Elongation | ≥ 2 | % |
| Hardness HB | ≤ 50 | HB |
T6 (solution treated + artificially aged)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 220 | MPa |
| Yield Strength | ≥ 180 | MPa |
| Elongation | ≥ 1 | % |
| Hardness HB | ≤ 75 | HB |
| Density | ≥ 2.65 | g/cm3 |
| Elastic Modulus | ≥ 74 | GPa |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| solution_annealing | 525–540 °C | water | — | T6: solution treat + water quench |
| aging | 155–175 °C | air | — | T6: artificial aging 6-8h |
Related materials
EN AW-6082
3.2315High-strength structural aluminium alloy in the Al-Mg-Si family. One of the strongest 6xxx series alloys due to manganese addition. Replaced 6061 in many European applications. Used for trusses, bridges, cranes, transport, scaffolding, and marine applications. Heat treatable (T6/T651).
EN AW-5083
3.3547The highest-strength non-heat-treatable aluminium alloy. Excellent corrosion resistance (especially seawater), good weldability. Standard alloy for shipbuilding, offshore, pressure vessels, cryogenic applications, and armour plate. Not for continuous service above 65°C under stress (SCC risk).
EN AW-2024
3.1355Classic high-strength aerospace aluminium alloy (Al-Cu-Mg). Excellent fatigue resistance — the standard choice for aircraft fuselage skins and wing tension members. Poor corrosion resistance and weldability. Often supplied with Alclad cladding for corrosion protection. In use since 1931.
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