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Aluminum Alloy 5059, also called EN AW-5059 or AlMg5.5Zn, is a high-strength, corrosion-resistant marine-grade aluminum alloy widely used in shipbuilding, defense armor, LNG storage tanks, pressure vessels, and structural engineering. As a premium alloy within the 5xxx aluminum–magnesium family, 5059 aluminum plate offers remarkable weldability, excellent stress-corrosion resistance, and superior mechanical strength compared with 5083 or 5383, making it a preferred material for high-performance marine and industrial applications.
Keywords: 5059 aluminum, 5059 aluminum plate, 5059 aluminum sheet, EN AW-5059, AlMg5.5Zn, marine-grade aluminum plate, armor aluminum alloy.
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Technical Specifications – Aluminum Alloy 5059
Aluminum Alloy 5059 is a high‑strength, corrosion‑resistant 5xxx series aluminum alloy primarily alloyed with magnesium, offering excellent marine corrosion resistance, weldability, and structural performance. Used widely in marine engineering, shipbuilding, offshore structures, transportation, aerospace, and industrial applications, 5059 aluminum sheet and plate materials deliver outstanding strength‑to‑weight ratios while maintaining formability and durability. We supply AA 5059 aluminum plates, sheets, and custom sizes with global certifications and technical support.
| Property | Specification / Range |
|---|---|
| Alloy | AA 5059 / EN AW‑5059 |
| Series | 5xxx aluminum‑magnesium alloy |
| Main Alloying Element | Mg ~5.0–6.0%, Mn ~0.6–1.2% |
| Density | ~2.66 g/cm³ |
| Physical Properties | Lightweight, low density |
| Mechanical Properties | High tensile strength & yield |
| Temper Options | O, H111, H116, H321, H34, H36 |
| Corrosion Resistance | Excellent, especially in marine environments |
| Weldability | Excellent (MIG / TIG compatible) |
| Formability | Good to very good depending on temper |
| Standard | AA / ASTM B209 / EN |
| Typical Forms | Sheet, Plate, Coil |
| Surface | Mill / Polished / Customized |
| Certifications | ISO / MTR / PMI available |
Chemical Composition (EN 573 Standard)
| Element | Percent (%) |
|---|---|
| Magnesium (Mg) | 5.0–6.0 |
| Manganese (Mn) | 0.40–1.0 |
| Zinc (Zn) | 0.20–1.0 |
| Chromium (Cr) | ≤0.30 |
| Titanium (Ti) | ≤0.15 |
| Iron (Fe) | ≤0.40 |
| Silicon (Si) | ≤0.30 |
| Copper (Cu) | ≤0.25 |
| Aluminum (Al) | Balance |
Mechanical Properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| O | 260–320 | 120–160 | 17–22 |
| H116 | 330–400 | 230–280 | 12–16 |
| H321 | 340–410 | 240–300 | 12–16 |
| H111 | 300–360 | 150–200 | 14–18 |
Aluminum Alloy 5059
| Form | Size / Dimensions | Thickness / Diameter | Width | Length | Standard / Grade | Surface Finish | Typical Applications |
|---|---|---|---|---|---|---|---|
| Aluminum Rod / Bar | Round: Ø10–300 mm (0.39–11.8")Square: 10–200 mm (0.39–7.87")Hex / Custom Section: 10–150 mm (0.39–5.9") | – | – | 1–6 m (3.3–19.7') | EN AW-5059 / ASTM B221 | Mill, Polished, Anodized | Marine structural components, machinery shafts, armor parts |
| Aluminum Plate / Sheet | 4–200 mm (0.157–7.87") | 4–200 mm | 1000–3000 mm (39–118") | 2000–12000 mm (78–472") | EN AW-5059 / ASTM B928 | Mill, Polished, Brushed, Anodized, Tread Plate | Ship hulls, offshore structures, industrial tanks, armor panels |
| Aluminum Coil / Strip | Coil thickness: 1–10 mm (0.039–0.39")Strip width: 20–500 mm (0.78–19.7") | 1–10 mm | 500–2000 mm (20–78") | Coil length: Custom | EN AW-5059 / ASTM B209 | Mill, PE protective film, Anodized | Automotive panels, marine applications, industrial fabrication |
| Aluminum Tube / Pipe | OD: 10–300 mm (0.39–11.8")ID: 5–295 mm (0.2–11.6") | 2–30 mm (0.08–1.18") | – | 1–6 m (3.3–19.7') | EN AW-5059 / ASTM B210 / ASTM B221 | Mill, Polished, Anodized | Marine piping, structural supports, industrial fluid transport |
Key Features & Advantages
✔ Marine-Grade Corrosion Resistance
Superior performance in seawater, brine, and chloride environments.
✔ Higher Strength than 5083
Improved tensile and yield strength-ideal for lightweight structural components.
✔ Exceptional Weldability
Suitable for MIG, TIG, friction-stir welding with minimal loss of strength.
✔ Excellent Impact Resistance
Commonly used in naval armor and protective structures.
✔ Stress-Corrosion & Cracking Resistance
Strong resistance against SCC, exfoliation, and fatigue.
✔ Lightweight yet High Load-Bearing Capability
Ideal for replacing steel in heavy-duty applications for weight reduction.
Applications of Aluminum Alloy 5059
Marine & Offshore
Ship hulls and superstructures
High-speed vessels, patrol boats
LNG and chemical tank walls
Offshore platforms
Defense & Aerospace
Vehicle armor plates
Naval armor systems
Lightweight structural shields
Industrial & Structural
Pressure vessels
Bridges & welded structures
Cryogenic equipment
Heavy-duty machinery components
5059 vs 5083 Aluminum Alloy Performance Comparison
| Feature | 5059 | 5083 |
|---|---|---|
| Magnesium Content | Higher (~5.0–6.0%) | Lower (~4.0–4.9%) |
| Tensile Strength | Higher (H116 ~370–440 MPa) | Lower (~305–385 MPa) |
| Weldability | Excellent | Good |
| Corrosion Resistance | Excellent | Good |
| Best Suitability | High‑load marine / structural | General marine / storage |
Inspection & Quality Assurance
We implement strict quality management throughout the entire supply chain:
100% raw-material traceability
Ultrasonic inspection (UT) Level A/B according to EN/ASTM
Mechanical property testing (UTS, YS, elongation)
Corrosion testing & metallographic analysis
Third-party inspection available: SGS, BV, ABS, DNV, LR
Precise dimensional control for global engineering standards
Products Description
Whether you are building marine vessels, offshore structures, armored systems, or large industrial equipment, our team provides professional technical support, rapid quoting, material selection guidance, and export documentation assistance.
Tell us your project specifications, drawings, or required standards, and we will provide the best-price solution and fastest delivery for Aluminum Alloy 5059 plates and sheets.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
1. What are the main advantages of 5059 compared to 5083 and 5454?
5059 offers higher tensile and yield strength, superior stress-corrosion resistance, and better high-temperature performance than 5083. Compared to 5454, it provides higher mechanical strength while maintaining excellent corrosion resistance.
2. Is 5059 suitable for marine applications?
Yes. 5059 is a marine-grade aluminum alloy with exceptional resistance to seawater corrosion, pitting, and stress-corrosion cracking, making it ideal for ship hulls, offshore platforms, and high-speed vessels.
3. Can 5059 aluminum be welded without losing strength?
Yes. 5059 has excellent weldability (TIG, MIG, friction stir welding). After proper welding, the material retains a high level of mechanical strength, especially in H32 or H116 temper.
4. What tempers are available for 5059 aluminum?
Common tempers include O (soft annealed), H111, H116, H321, H32, H24. Each temper balances strength, ductility, and corrosion resistance for specific applications.
5. Can 5059 be used in high-temperature or cryogenic applications?
Yes. 5059 maintains mechanical stability at elevated temperatures (up to ~150–200°C) and excellent toughness at low temperatures, suitable for cryogenic tanks or heat-exposed components.
6. What are the typical forms available for 5059 aluminum?
5059 is available as sheet, plate, coil, strip, rod/bar, and tube/pipe, with custom diameters, widths, and thicknesses per project requirements.
7. Which standards do 5059 products comply with?
5059 aluminum plates, sheets, and coils can meet EN 485, EN 573, ASTM B209, ASTM B928, ASTM B221, GB/T 3880, with MTC EN10204 3.1 or third-party certification (SGS, BV, ABS, DNV, LR) available.
8. Can 5059 aluminum be anodized or surface-treated?
Yes. It is compatible with clear anodizing, color anodizing, powder coating, brushing, polishing, and PE protective films.
9. What are the typical lead times for 5059 aluminum?
Standard stock sizes: 7–12 days
Custom thickness, width, temper, or form: 15–25 days depending on production and processing.
10. Is 5059 suitable for structural and armor applications?
Yes. Its high strength, excellent impact resistance, and corrosion resistance make it ideal for naval armor, military vehicles, industrial tanks, and high-strength structural components.
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