Common tempers of GNEE's 5083 aluminum plates include H111, H112, H116, and H321, each offering distinct performance characteristics to meet various application requirements.
As a 5-series aluminum-magnesium alloy, 5083 is widely used in shipbuilding and yacht manufacturing, particularly for medium and thick aluminum plates. Its different tempers are designed to provide specific mechanical and corrosion-resistant properties depending on the intended use.
GNEE 5083 H111 Aluminum Plate
The H111 temper is moderately work-hardened after annealing, offering balanced strength and corrosion resistance. It is suitable for applications where extreme mechanical performance is not required but corrosion resistance remains important. Typical uses include hull structures, cabins, and other components that are exposed to marine environments but do not bear heavy loads.
GNEE 5083 H112 Aluminum Plate
The H112 temper provides higher strength and is ideal for applications that demand greater structural integrity. It is commonly used for hot-rolled plates in free processing conditions. This temper is suitable for parts that require higher load-bearing capacity, such as main hull structures, frames, and other critical components.
GNEE 5083 H116 Aluminum Plate
The H116 temper is specifically designed for 5-series alloys with high magnesium content (≥4.0%), offering excellent corrosion resistance. It is particularly suitable for harsh marine environments and is often used in hull shells and components located below the waterline.
GNEE 5083 H321 Aluminum Plate
The H321 temper undergoes rigorous work-hardening, providing high strength and corrosion resistance. It is suitable for structural components that must endure heavy loads and demanding conditions, such as thick hulls and high-load structural parts.
Specifications of 5083 Marine-Grade Aluminum Plates
| Alloy | Temper | Thickness (mm) |
|---|---|---|
| 5083 | O, H111 | 3.00–50.00 |
| 5083 | H116, H321 | 3.00–50.00 |
| 5083 | H112 | 6.00–50.00 |
Chemical Composition of 5083 Marine Aluminum Plate
| Element | Composition % |
|---|---|
| Al | REM |
| Si | ≤0.4 |
| Cu | ≤0.10 |
| Mg | 4.0–4.9 |
| Zn | ≤0.25 |
| Mn | 0.40–1.0 |
| Ti | ≤0.15 |
| Cr | 0.05–0.25 |
| Fe | ≤0.40 |
| Note: Single ≤0.05; Total ≤0.15 |
Mechanical Properties of 5083 Marine Aluminum Plate
| Alloy | Temper | Thickness (mm) | Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation % |
|---|---|---|---|---|---|
| 5083 | O | 3.00–50.00 | 275–350 | ≥125 | ≥16 |
| 5083 | H111 | 3.00–50.00 | 275–350 | ≥125 | ≥16 |
| 5083 | H22, H32 | 3.00–6.00 | 305–380 | ≥215 | ≥8 |
| 5083 | H116 | 3.00–50.00 | ≥305 | ≥215 | ≥10 |
| 5083 | H321 | 3.00–50.00 | 305–385 | ≥215 | ≥12 |
| 5083 | H112 | 6.00–50.00 | ≥275 | ≥125 | ≥12 |
How to Choose the Right Temper for Shipbuilding
5083 H111: Suitable when a balance of strength and corrosion resistance is needed, but extreme mechanical properties are not required. Ideal for non-load-bearing components exposed to marine conditions.
5083 H112: Recommended when higher strength is necessary while maintaining corrosion resistance and good machinability. Used for load-bearing hull structures and frames.
5083 H116: Optimal for applications requiring excellent corrosion resistance, especially in harsh saltwater environments. Often used below the waterline.
5083 H321: Best for maintaining high strength and durability under demanding conditions. Suitable for critical structural parts and heavy hulls.
Selection Tips:
Consider the Environment: For harsh marine conditions, prioritize H116 or H321 for superior corrosion resistance.
Evaluate Load Requirements: For components bearing heavy loads, select H112 or H321 for higher strength.
Machinability Needs: If extensive machining is required, H112 is preferable for better processing performance.
GNEE Aluminum ensures that 5083 aluminum plates in all tempers meet stringent quality and environmental management standards and are certified by CCS, DNV, NK, ABS, BV, LR, and KR, providing reliable performance in marine applications.
