Aluminium 5251
Materials Aluminium 5251 H11 (NS4)
Description
5251 is a medium strength aluminium alloy with good corrosion resistance, especially in marine environments. It offers excellent formability and weldability, making it ideal for sheet metal work, boat hulls, and automotive panels. While not heat-treatable, 5251 develops moderate strength through cold working and is widely used where a balance of strength and corrosion resistance is required.
Key Features
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Medium strength aluminium alloy
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Excellent corrosion resistance
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Good weldability and formability
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Suitable for marine environments
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Non-heat-treatable (strengthened by cold working)
Applications
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Marine components
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Automotive panels
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Roofing and cladding
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Chemical storage tanks
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Sheet metal fabrications
Availability
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Flat plate
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Flat strip
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Coil roll
| Chemical Composition (Weight %) | ||
| Min | Max | |
|---|---|---|
| Mn | 0.40 | 1.00 |
| Fe | 0 | 0.50 |
| Mg | 0.60 | 1.20 |
| Si | 0.70 | 1.30 |
| Cu | 0 | 0.1 |
| Zn | 0 | 0.2 |
| Ti | 0 | 0.1 |
| Cr | 0 | 0.25 |
| Al | Bal | Bal |
| Others | 0 | 0.15 |
| Material Properties | |
| Machinability | Fair |
| Weldability | Very Good |
| Formability | Very Good |
| Corrosion Resistance | Good |
| Related Material Specifications | |
| European (EN Designation) | EN AW-5082, AlMg4.5Mn |
| DIN Numerical Designation | 3.3345 |
| ISO | AlMg4.5Mn |
| UNS (AA/US) | A95082 |
| Mechanical Properties | |
| Tensile Strength | 380 -400 N/mm² |
| Yield Strength | 300 -340 N/mm² |
| Shear Strength | 210 – 230 N/mm² |
| Elongation | 1.1 % |
| Hardness | 40 Brinell |
| Thermal Conductivity | 180 W/m.K |
| Coefficient of Thermal Expansion | 24 x 10-6 /K |
| Elastic Modulus | 70000 Mpa |
Need Technical Assistance?
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How to order parts?
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