EN AC-AlSi8Cu3
EN AC-46200General-purpose aluminum sand and gravity die casting alloy with copper addition for improved strength. Si 7.5-9.5% and Cu 2.0-3.5% provide good castability and moderate strength without heat treatment. Used for general-purpose engine components, industrial housings, pump bodies, and medium-duty structural castings where machinability is important. Lower Fe tolerance than EN AC-46000 makes it suitable for sand/gravity casting.
Chemical composition comparison (wt%)
Side-by-side: EN AC-AlSi8Cu3 (EN) (EN 1706) vs ASTM
| Element | EN AC-AlSi8Cu3 (EN) | ASTM | Overlap |
|---|---|---|---|
| Si | 7.5–9.5% | — | — |
| Mn | 0.15–0.65% | — | — |
| Cu | 2–3.5% | — | — |
| Ti | ≤ 0.25% | — | — |
| Fe | ≤ 0.8% | — | — |
| Mg | 0.05–0.55% | — | — |
| Zn | ≤ 1.2% | — | — |
Mechanical properties
F
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ≥ 150 | MPa |
| Yield Strength | ≥ 90 | MPa |
| Elongation | ≥ 1 | % |
| Hardness HB | ≤ 60 | HB |
| Density | ≥ 2.75 | g/cm3 |
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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