Why choose GNEE marine grade 5083 and 5383 aluminum hex bars?
The 5083 and 5383 aluminum hex bars produced by GNEE comply with various international and industry standards to ensure product quality and performance that meet global application requirements.
GNEE Aluminum is committed to supplying high-quality aluminum materials for marine engineering, shipbuilding, and marine equipment. Our products offer stable performance and reliable quality, supported by certifications from internationally recognized classification societies, earning the trust and recognition of customers worldwide.
We have received certifications from the following international classification societies:
DNV (Det Norske Veritas)
CCS (China Classification Society)
ABS (American Bureau of Shipping)
BV (Bureau Veritas)
LR (Lloyd's Register)
KR (Korean Register of Shipping)
Standard Specifications for GNEE 5083 and 5383 Aluminum Hex Bars
ASTM Standards: Primarily comply with ASTM B221 (Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, and Profiles) and ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate).
EN Standards: Conform to EN 485-2 (Aluminum and Aluminum Alloys - Chemical Composition and Mechanical Properties of Products) and EN 755 (Aluminum and Aluminum Alloys - Extruded Rods, Bars, Tubes, and Profiles).
Chinese National Standards: Meet GB/T 3190 (Chemical Composition of Wrought Aluminum and Aluminum Alloys) and GB/T 6892-2023 (Extruded Profiles for General Industrial Applications of Aluminum and Aluminum Alloys).
Classification Society Certifications: GNEE's 5083 and 5383 marine aluminum hex bars are certified by the China Classification Society (CCS) and Det Norske Veritas (DNV).
Specifications for Marine Grade 5083 and 5383 Aluminum Hexagon Bars
Alloy: 5083, 5383
Temper: O, H112
Maximum Inscribed Circle Diameter: 200 mm
Length: 1000mm–12000mm (or according to customer requirements)
Dimensional Tolerances of 5083 and 5383 Aluminum Hexagon Bars
Across Flats Tolerance: For hex bars with across flats ≤ 50mm, the standard tolerance is ±0.50mm, and precision grade tolerance can reach ±0.40mm. For hex bars with across flats in the range of 50–220mm, the tolerance increases with size.
Length Tolerance: For hex bars with lengths ≤ 6m, the length tolerance is ±5mm. When the length exceeds 6m, the tolerance increases by ±1mm for each additional meter, but does not exceed ±20mm in total.
Recommendations for Choosing Between 5083 and 5383 Aluminum Hex Bars
General Marine Environment: 5083-H116 aluminum hex bars are a cost-effective option for standard ship structures and marine applications.
Harsh Marine Environment: For deep-sea environments, high salinity areas, or structures submerged in seawater for long periods, 5383-H116 aluminum hex bars are recommended.
Low-Temperature Environment: Both alloys perform well in low-temperature conditions (e.g., LNG storage tanks), but 5083 offers slightly better low-temperature toughness.
High Lightweight Requirements: 5383 aluminum hex bars offer an advantage due to their higher strength-to-weight ratio.
Chemical Composition of Marine Grade 5083 and 5383 Aluminum Hexagon Bars
| Elements | 5083 (%) | 5383 (%) |
|---|---|---|
| Si | 0–0.4 | 0–0.25 |
| Fe | 0–0.4 | 0–0.25 |
| Cu | 0–0.1 | 0–0.2 |
| Mn | 0.40–1.00 | 0.70–1.00 |
| Mg | 4.00–4.90 | 4.0–5.20 |
| Cr | 0.05–0.25 | 0–0.25 |
| Zr | - | 0–0.2 |
| Zn | 0–0.25 | 0–0.4 |
| Ti | 0–0.15 | 0–0.15 |
| Al | Balance | Balance |
Mechanical Properties of Marine Grade 5083 and 5383 Aluminum Hex Bars
| Alloy | Temper | Inscribed Circle Diameter (mm) | Tensile Strength (N/mm²) | Elongation After Break (%) |
|---|---|---|---|---|
| 5083 | O | ≤12.50 | 270–350 | 14 |
| >12.50–200.00 | 270 | - | ||
| H112 | ≤12.50 | 270 | 12 | |
| >12.50–200.00 | 12 | - | ||
| 5383 | O | ≤12.50 | 290 | 17 |
| >12.50–50.00 | 17 | - | ||
| H112 | ≤12.50 | 310 | 13 | |
| >12.50–50.00 | 13 | - |
Characteristics of 5083 and 5383 Marine Aluminum Hexagon Bars
Corrosion Resistance: Both alloys provide excellent corrosion resistance, making them ideal for marine environments, offering resistance to seawater, salt spray, and marine atmosphere.
Special Advantage of 5383: It demonstrates superior corrosion resistance compared to 5083, particularly in intergranular corrosion and stress corrosion cracking tests.
Mechanical Strength: 5083-H116 has a tensile strength of 270–305 MPa, while 5383-H116 offers higher strength, particularly in welded structures.
Elongation: 5083-H116 has elongation of about 10–15%, while 5383-H116 offers slightly lower elongation but maintains good ductility.
Low-Temperature Performance: Both alloys perform well at low temperatures, making them suitable for cold marine regions, with 5083 showing an improvement in impact strength at -40°C.
Fatigue Strength: The impact strength of 5383 is approximately 10% higher than 5083, which is important for marine structures subject to cyclic loading.
Applications of 5083 and 5383 Marine Aluminum Hexagon Bars
Marine Sector: Used for hull structures, ship superstructures, equipment installation, offshore platforms, and ship repairs.
Other Sectors: Transportation (rail vehicles, trucks, refrigerated containers), pressure vessels, storage tanks, aerospace, military, industrial equipment, and architectural structures.
Selection Guide for 5083 and 5383 Marine Grade Aluminum Hexagon Bars
Alloy Selection: Choose 5083 for general marine applications, and 5383 for harsh environments or high-strength needs.
Temper Selection: O temper offers maximum ductility, while H112 and H116 offer strength for marine environments.
Dimensional and Quality Specifications: Select based on load requirements, dimensions, and required certifications for specific applications.
