Related Specifications
Alloy 5251 also corresponds to the following standard designations and specifications but may not be a direct equivalent:rms to:
- Al Mg2
- Al 2.0Mg 0.3Mn
Temper Types
The most common tempers for 5252 aluminium are:
- H22
- H24
- H26
- O
Properties
Chemical Composition
Alloy 5251
BS EN 573-3
Chemical Element | % Present |
---|---|
Manganese (Mn) | 0.10 - 0.50 |
Iron (Fe) | 0.00 - 0.50 |
Copper (Cu) | 0.00 - 0.15 |
Magnesium (Mg) | 1.70 - 2.40 |
Silicon (Si) | 0.00 - 0.40 |
Zinc (Zn) | 0.00 - 0.15 |
Chromium (Cr) | 0.00 - 0.15 |
Titanium (Ti) | 0.00 - 0.15 |
Other (Each) | 0.00 - 0.05 |
Others (Total) | 0.00 - 0.15 |
Aluminium (Al) | Balance |
Mechanical Properties
Sheet 0.2mm to 4mm
BS EN 485-2
Mechanical Property | Value |
---|---|
Proof Stress | 170 Min MPa |
Tensile Strength | 230 - 270 MPa |
Hardness Brinell | 69 HB |
General Physical Properties
Physical Property | Value |
---|---|
Density | 2.69 g/cm³ |
Melting Point | 625 °C |
Thermal Expansion | 25 x 10-6/K |
Modulus of Elasticity | 70 GPa |
Thermal Conductivity | 134 W/m.K |
Electrical Resistivity | 0.044 x 10-6 Ω .m |
Applications
- Boats
- Panelling and pressings
- Marine structures
- Aircraft parts
- Vehicle panels
- Furniture tubing
- Silos
- Containers
Characteristics
- Work hardening rapidly
- Readily weldable
- High corrosion resistance particularly in marine environments
Additional Information
Weldability
Aluminium alloy 5251 is a readily weldable alloy.
The recommended filler wire is 5356 when welding alloy 5251 to itself, 6XXX series alloys, 7XXX series alloys and most other 5XXX alloys.
When welding alloy 5251 to 5005, 5020, 1XXX series or 3XXX series alloys, the recommended filler wire is 4043.
Process | Rating |
Weldability - Gas | Very Good |
Weldability - Arc | Very Good |
Weldability - Resistance | Very Good |
Brazability | Poor |
Fabrication
Process | Rating |
---|---|
Workability - Cold | Very Good |
Machinability | Average |