1. Core material selection
5083 aluminum-magnesium alloy
Corrosion resistance: 4.5–5.6% magnesium content forms β (Mg₂Al₃) corrosion-resistant phase, salt spray corrosion resistance ≥ 5000 hours (5-year measured corrosion rate in the North Sea ≤ 0.018mm/a);
Mechanical properties: tensile strength 290–340MPa, yield strength 240–290MPa, elongation 12–16%;
Application scenarios: heavy corrosion environments such as ship decks and offshore platforms, supporting high-frequency vibration and impact loads.
5052 aluminum alloy
Cost-effectiveness advantage: The price is 10–15% lower than 5083, and the static load-bearing capacity is 300–450kg/m², which is suitable for small and medium-sized ship decks;
Processing performance: elongation 12–15%, can be cold-bent, and is equipped with a five-rib pattern anti-slip design (friction coefficient increased by 60%).
2.Comparison of key performance parameters
| Indicator | 5083 Aluminum Plate | 5052 Aluminum Plate |
|---|---|---|
| Density | 2.66 g/cm³ | 2.68 g/cm³ |
| Thermal Conductivity | 138 W/(m·K) | 137 W/(m·K) |
| Tensile Strength | 290–340 MPa | 210–260 MPa |
| Unit Price Range | 55–80 yuan/kg (6mm thickness) | 19–30 yuan/kg |
3.Production process requirements
Rolling process
Hot rolling blanking temperature 450–480℃, final rolling temperature ≥350℃ (80mm plate thickness tolerance ±0.8%);
Cold rolling total deformation 35–40% (H34 state), intermediate annealing 345℃×3h to eliminate internal stress.
Surface treatment
The milling surface roughness is Ra1.6μm, and the single-side removal is ≥1.5mm;
The five-rib pattern design depth is 1.5-3mm, and the deformation under vertical load is ≤5% of the plate thickness.
4.Engineering application suggestions
Selection and matching: Ocean-going ships: 6-8mm thick 5083-H116 aluminum plates (corrosion resistance + impact resistance) are preferred; Small inland ships: 5mm thick 5052 aluminum alloy can be selected (taking into account both cost and load-bearing).
Installation specifications:
The bolt fixing spacing is ≤300mm, and the edges need to be welded and reinforced (to reduce stress concentration);
When splicing multiple plates, reserve 2-4mm expansion joints (to compensate for thermal expansion).
5.Quality Control Standards
Composition Deviation: Spectral Analysis + ICP-MS Testing, Alloy Element Error ≤±0.12%; Dynamic Performance: Fatigue Limit ≥140MPa (10⁷ Cycles), Impact Energy ≥25J; Anti-Slip Testing: Wet Friction Coefficient ≥0.45 (ASTM D1894 Standard). Conclusion: The aluminum patterned plate for ship decks needs to have comprehensive corrosion resistance, load-bearing and process requirements. 5083 aluminum-magnesium alloy is suitable for high-corrosion and heavy-load scenarios, while 5052 aluminum alloy is more economical. The actual selection should be comprehensively evaluated in combination with the ship type, budget and maintenance cycle.
