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5083 H321 Aluminum Plate
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5083 H321 aluminum plate is a non-heat-treatable aluminum-magnesium alloy with a controlled strain-hardened and stabilized condition. It is widely used in marine, transportation, and structural applications due to its excellent corrosion resistance, high strength, and good weldability.
The “H321” temper indicates that the material has been strain-hardened and then stabilized to achieve a balance between strength and stress corrosion resistance.
Chemical Composition (Typical)
5083 aluminum belongs to the Al-Mg alloy series, with magnesium as the main strengthening element.
| Element | Content (%) | Function |
|---|---|---|
| Magnesium (Mg) | 4.0 – 4.9 | Primary strengthening element |
| Manganese (Mn) | 0.4 – 1.0 | Improves strength and corrosion resistance |
| Chromium (Cr) | 0.05 – 0.25 | Enhances stress corrosion resistance |
| Iron (Fe) | ≤ 0.40 | Impurity control |
| Silicon (Si) | ≤ 0.40 | Improves processing stability |
| Aluminum (Al) | Balance | Base metal |
Mechanical Properties (H321 Condition)
- High strength among non-heat-treatable aluminum alloys
- Good fatigue resistance
- Stable performance under marine environments
- Good weldability with minimal strength loss after welding
Typical characteristics:
- Medium to high tensile strength
- Excellent corrosion resistance in seawater and humid environments
- Good formability for plate processing
Key Performance Features
1. Excellent Corrosion Resistance
5083 H321 performs extremely well in:
- Marine atmosphere
- Saltwater exposure
- Chemical and industrial environments
This makes it one of the most reliable aluminum alloys for shipbuilding.
2. High Strength and Structural Stability
Compared with general aluminum alloys:
- Higher strength than 5052
- Better structural stability under load
- Suitable for long-term load-bearing applications
3. Good Weldability
- Suitable for MIG and TIG welding
- Maintains good joint strength after welding
- Widely used in welded structures
4. Low-Temperature Performance
- No brittle fracture at low temperatures
- Suitable for cryogenic and offshore environments
Common Applications of 5083 H321 Aluminum Plate
1. Marine Industry
- Ship hull structures
- Deck plating
- Offshore platform components
- Coastal engineering structures
2. Transportation Industry
- Railway vehicles
- Tank trucks
- Heavy-duty vehicle body structures
3. Pressure and Storage Systems
- Cryogenic storage tanks
- LNG-related structures
- Chemical storage equipment
4. Structural Engineering
- Welded structural panels
- Load-bearing platforms
- Industrial structural components
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