BS 1490 · Al-Si-Cu casting alloy
LM4 Aluminium Alloy Ingot
General-purpose sand and gravity die-casting alloy with good castability and moderate strength.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Si | 4.0 – 6.0 |
| Cu | 2.0 – 4.0 |
| Fe | ≤ 0.8 |
| Al | Balance |
Mechanical & Physical Properties
Tensile strength
≈ 230 MPa
Machinability
Good
Applications
ManifoldsGearbox casesCover platesBrackets
Advantages
- Versatile
- Good machinability
- Heat treatable