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Home > News & Blog > News > 5083 H116 aluminum plate for yacht hull
In the field of yacht manufacturing that pursues lightweight and extreme corrosion resistance, 5083 marine aluminum plate is the first material to be considered. And 5083 H116 aluminum plate has become the preferred material for high-performance yacht hulls below 20 meters due to its unique “marine grade” performance.
1. King of seawater corrosion resistanceCore mechanism: 4.0%-4.9% magnesium (Mg) content forms a dense Mg₂Al₃ oxide film, which actively resists chloride ion corrosion.
Salt spray test data:
| Test Standards | Duration | Corrosion Depth |
| ISO 9227 | 5000h | ≤0.1mm |
| ASTM B117 | 3000h | pitting-free |
2. Perfect balance of strength and toughnessCharacteristics of 5083 H116 aluminum plate: Through stabilized annealing + controlled stretching, cold working stress is eliminated and stress corrosion resistance is increased by 50%.
Comparison of mechanical properties (vs ordinary 5083 aluminum plate):
| Performance Indicators | 5083 H116 | Normal 5083 |
| Yield Strength (MPa) | 215 | 190 |
| Tensile Strength (MPa) | 305 | 275 |
| Elongation (%) | 16 | 12 |
3. Welding without defectsWelding process: 5083 H116 aluminum plate is suitable for MIG welding + ER5356 welding wire, and the weld strength coefficient reaches 0.93 (industry requirements> 0.85).
Heat-affected zone (HAZ) performance: Strength loss is only 8% (ordinary aluminum reaches 20%).
Ultimate load of 5083-H116: can withstand the impact of wave height 4m (equivalent to 40 knots). At the same time, we recommend choosing the matching aluminum plate thickness according to the hull length.
| Length(m) | Bottom plate thickness (mm) | Side plate thickness (mm) |
| 10 | 5 | 4 |
| 15 | 6.2 | 5 |
| 20 | 7.6 | 6 |
Fatigue resistance test:
| Test items | Standard requirements | Test results |
| Alternating load (10^6 times) | No cracks | Stress amplitude 180MPa |
| Local impact (J) | >15 (0℃) | 22.3 |
| Cost Item | 5083 H116 aluminum hull | Fiberglass hull | Steel hull |
| Material Cost | $ $ $ $ | $ $ | $ |
| Manufacturing hours | 300 hours/ton | 450 hours/ton | 200 hours/ton |
| Maintenance cycle | 20 years | 8 years | 5 years |
| Residual value (after 20 years) | 60% | 20% | 30% |
Although the initial cost is 15% higher, the full-cycle cost is reduced by 40% (weight reduction → fuel saving + no anti-corrosion maintenance).
5083 H116 aluminum plate redefines the performance benchmark of yacht hulls with the appearance of “marine-grade metal”:
✅ Safety: 3000h salt spray zero corrosion + 4m wave impact resistance
✅ High efficiency: 30% weight reduction → 25% fuel consumption reduction
✅ Long-term: 20 years of structural maintenance-free
Contact us for free samples and technical support. Click to Order
Original Source:Marine Grade Aluminum Sheet Plate
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