About Alloy
Aluminum alloy 5251 is a versatile member of the 5xxx series, primarily composed of aluminum with magnesium as its principal alloying element. Known for its excellent corrosion resistance and weldability, alloy 5251 finds extensive use across various industries. It is particularly valued in marine applications for its ability to withstand corrosive environments, making it suitable for boat hulls, superstructures, and marine fittings. Additionally, its formability allows it to be easily shaped into complex designs, making it ideal for automotive panels, architectural components, and sheet metal work. With moderate strength and the capability to be strengthened through cold working, aluminum alloy 5251 serves as a reliable choice in engineering and construction sectors where durability and performance are essential. Its versatility extends to food processing equipment and decorative applications such as signage and architectural elements, highlighting its wide-ranging utility in modern industrial and consumer applications.
Product Form
BS 5L44 Alloy 5251 Forging Stock and Forgings
BS 3L56 Alloy 5251 Tube Drawn Hydraulically Tested
BS 3 L80 Alloy 5251-0 Sheet and Strip
BS 3 L81 Alloy 5251-H16/H26 Sheet and Strip
BS N4 Alloy 5251
Chemical Composition
| Weight% | Si | Fe | Cu | Mn | Cr | Mg | Zn | Ti | Others |
| Alloy 5251 | 0.40 max | 0.50 max | 0.15 max | 0.10-0.50 | 0.15 max | 1.70 -2.4 | 0.15 max | 0.15 max | 0.05 (each) 0.15 (total) |
Property
| Material | Temper | Thickness (mm) | Tensile Strength (N/mm²) | Yield Strength (N/mm²) mm | Elongation on 50mm | ||||
| 0.5 mm | 0.8 mm | 1.3 mm | 2.6 mm | 3.0 mm | |||||
| 5251 Sheet | 0 | 0.2 - 6.0 | 160-200 | 60 | 18 | 18 | 18 | 20 | 20 |
| 5251 Sheet | H22 | 0.2 - 6.0 | 200-240 | 130 | 4 | 5 | 6 | 8 | 8 |
| 5251 Sheet | H24 | 0.2-12.5 | 225-275 | 175 | 3 | 4 | 5 | 5 | 5 |
| 5251 Sheet | H28 | 0.2-3.0 | 255-285 | 215 | 2 | 3 | 3 | 4 | 4 |
Application
Marine: Boat hulls, superstructures, marine fittings
Automotive: Panels, trim, structural components
Engineering: Sheet metal work, roofing, architectural applications
Food Processing: Equipment and components
Decorative: Signage, decorative panels, architectural elements
Aluminum alloy 5251 is chosen for its corrosion resistance, weldability, formability, and moderate strength, making it suitable for diverse applications in marine, automotive, engineering, construction, food processing, and decorative industries.
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