EN AW-5251 · AlMg2Mn0.3
A British-heritage 2% magnesium alloy: light, ductile and seawater-tolerant, filling the gap between 5005 and 5052 for formed panelwork.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.40 |
| Fe | ≤ 0.50 |
| Cu | ≤ 0.15 |
| Mn | 0.10 – 0.50 |
| Mg | 1.7 – 2.4 |
| Zn | ≤ 0.15 |
| Cr | ≤ 0.15 |
| Ti | ≤ 0.15 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.69 g/cm³ |
| Melting range | 605 – 650 °C |
| Thermal expansion (20–100 °C) | 23.8 µm/m·K |
| Elastic modulus | 70 GPa |
| Thermal conductivity | 134 W/m·K |
| Electrical conductivity | 34 % IACS |
Strength Data
Mechanical properties by temper
Typical room-temperature values for orientation. Design minimums depend on product form, thickness and the governing specification — request the applicable table with your inquiry.
| Temper | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| O | 80 | 180 | 20 | 46 |
| H14 | 190 | 230 | 6 | 62 |
| H16 | 215 | 255 | 5 | 68 |
| H34 | 175 | 220 | 8 | 60 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlMg2Mn0.3 |
| EN numeric | EN AW-5251 |
| UNS | A95251 |
| Werkstoff-Nr. | 3.3525 |
| Common product standards | EN 485 / EN 573-3 · ASTM B209, B210, B211, B221 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Sheet | ASTM B209 | 5251 | H34 | Aerospace & Defense |
| Bar / Flat | ASTM B210 | 5251 | O | Aerospace & Defense |
| Bar / Flat | ASTM B211 | 5251 | H14 | Aerospace & Defense |
| Tube / Profile / Extrusion | ASTM B221 | 5251 | H16 | Aerospace & Defense |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-5251 is the right answer
- Vehicle paneling and trim
- Marine fittings
- Cooking equipment
- General fabrication sheet
Specifying EN AW-5251?
State the temper, product form, dimensions and governing standard from the tables above, and we will confirm availability with a firm price and delivery date — typically within one business day.
Request a QuoteMaterial Engineering
Not sure EN AW-5251 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.