Aluminium casting alloys
LM25 (BS 1490) chemical composition
Aluminium casting alloy LM25 (AlSi7Mg0.3)
The former British AlSi7Mg alloy of BS 1490, now withdrawn and superseded by BS EN 1706, where the nearest grade is EN AC-42000. Heat-treatable, widely used for general engineering and marine castings.
- Designation
- LM25
- Standard
- BS 1490 (withdrawn)
- Also known as
- ≈ AlSi7Mg0.3, ≈ EN AC-42000
- Family
- Aluminium casting alloys
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| SiSilicon | 6.50 | 7.50 |
| MnManganese | – | 0.30 |
| NiNickel | – | 0.10 |
| CuCopper | – | 0.20 |
| TiTitanium | – | 0.20 |
| FeIron | – | 0.50 |
| SnTin | – | 0.05 |
| ZnZinc | – | 0.10 |
| PbLead | – | 0.10 |
| MgMagnesium | 0.20 | 0.60 |
| AlAluminium | remainder | |
Basis of values: Limits per BS 1490 (withdrawn).
We cast LM25
We sand cast these aluminium alloys and machine the castings in the group's own CNC machine shop; the chemistry is verified by spectrometer and EN 10204 3.1 certificates are available.
- Sand casting at our foundry in Mandra, Attica; centrifugal casting for bushings, sleeves and liners
- Heat treatment at the foundry (water, oil or air quench); CNC machining in our machine shop in Perama
- Spectrometer analysis of every heat, mechanical testing and NDT
- EN 10204 3.1 inspection certificates; ISO 9001 (both plants) and ISO 14001 (foundry) certified
Other grades in this family
For information only, without warranty: limits per the cited standard or, where stated, typical or house values; ≈ marks a comparable grade, not an equivalent. The current edition of the standard, the purchase order and the drawing govern.