3A21 aluminum sheet is an aluminum–manganese alloy in the 3000 series. It is known for its good corrosion resistance, excellent formability, and moderate strength, making it suitable for a variety of applications in construction, transportation, and general engineering. 3A21 is widely used in environments requiring good durability and easy fabrication.
Specifications
| Item | Specification |
|---|---|
| Alloy / Grade | 3A21 |
| Chemical Composition (%) | Al ≥ 96.8, Mn 0.8–1.5, Fe ≤ 0.7, Si ≤ 0.6, Cu ≤ 0.1, Mg ≤ 0.1, Zn ≤ 0.2, Ti ≤ 0.15, Others ≤ 0.05 |
| Series | 3000 Series (Al-Mn Alloy) |
| Temper | O, H14, H16, H18, H19, H22 |
| Thickness (mm) | 0.2 – 250 |
| Width (mm) | 100 – 2650 |
| Length (mm) | 2000 – 6000 |
| Surface Finish | Mill Finish, Anodized, Painted |
| Standard | GB/T 3880, ASTM B209, EN AW-3A21 |
Description
Features
- Good Corrosion Resistance
Resistant to atmospheric corrosion, suitable for outdoor and humid environments.
- Moderate Strength
Stronger than 1000 series aluminum, suitable for general structural and decorative applications.
- Excellent Formability
Can be easily bent, rolled, and formed into panels, sheets, and structural components.
- Good Weldability and Fabrication
Supports welding and machining with minimal risk of cracking or distortion.
- Durable and Reliable
Stable mechanical properties under long-term service conditions.
Applications
- Building panels and roofing.
- Transportation vehicle panels.
- Chemical and storage containers.
- General engineering components.
- Decorative panels and industrial machinery.
