Views: 0 Author: Site Editor Publish Time: 2025-07-29 Origin: Site
Aluminum alloy 5251 is a medium-strength alloy with good ductility, thus exhibiting excellent formability. It is known for rapid work hardening and is easy to weld. Additionally, it boasts high corrosion resistance, especially in marine environments.
Aluminum alloy 5251 is typically used in:
Ships
Panels and stampings
Marine structures
Aircraft parts
Vehicle panels
Furniture tubes
Silos
Container
The following mechanical properties apply to the H22 temper.
| Chemical Elements | (%) (Content) |
| Manganese, Mn | 0.10 - 0.50 |
| Copper, Cu | 0.0 - 0.15 |
| Magnesium, Mg | 1.70 - 2.40 |
| Silicon, Si | 0.0 - 0.40 |
| Zinc, Zn | 0.0 - 0.15 |
| Chromium, Cr | 0.0 - 0.15 |
| Titanium, Ti | 0.0 - 0.15 |
| Others, each | 0.0 - 0.05 |
| Others, total | 0.0 - 0.15 |
| Iron, Fe | 0.0 - 0.50 |
| Aluminum, Al | Remain |
| Physical Properties | Value |
| Density | 2.69 g/cm³ |
| Melting Point | 625°C |
| Thermal Expansion | 25 x 10⁻⁶ /K |
| Elastic Modulus | 70 GPa |
| Thermal Conductivity | 134 W/mK |
| Electrical Resistivity | 0.044 x 10⁻⁶ Ω·m |
Specification: BS EN 485-2:2008
Sheets and Plates - 0.2mm to 25mm
| Mechanical Properties | Value |
| Proof Stress | Min. 120 MPa |
| Tensile Strength | 190 - 230 MPa |
| Brinell Hardness | 56 HB |
Aluminium 2.0Mg 0.3Mn
| Temper Types | Description |
| H24 | Work-hardened by rolling, then annealed to half-hard |
| H26 | Work-hardened by rolling, then annealed to three-quarter hard |
| O | Soft |
| H22 | Work-hardened by rolling, then annealed to quarter hard |
Brazability: Poor
Machinability: Average
Aluminum alloy 5251 stands out as a versatile medium-strength alloy, offering a favorable balance of formability, corrosion resistance, and weldability. Its well-defined chemical composition, reliable mechanical and physical properties across common tempers (such as H22, H24, H26, and O), and adaptability in manufacturing processes make it suitable for a wide range of applications—from marine and automotive components to furniture and industrial containers. For specific project requirements or further details on temper variations, welding techniques, or material sourcing, feel free to consult us or for tailored guidance.
