5083-5383-O-H112-Marine-Grade-Aluminum-Bars.pdf
Why Choose GNEE 5083 & 5383 Marine Aluminum Bars
5083 and 5383 marine aluminum bars are part of the 5xxx series aluminum-magnesium alloys, designed specifically for marine applications. The 5383 alloy is an upgraded version of 5083, offering enhanced strength and improved welding performance while maintaining excellent corrosion resistance.
These marine-grade aluminum bars are certified by major classification societies, including DNV, CCS, ABS, BV, LR, and KR, ensuring compliance with international marine standards.
Alloy Composition and Properties
Both 5083 and 5383 are primarily composed of aluminum with magnesium as the main alloying element. Magnesium improves strength and corrosion resistance, making these alloys ideal for exposure to seawater, salt spray, and harsh industrial environments.
The "O" and "H112" temper designations indicate the following:
O Temper: Fully annealed or softened, allowing easy forming and machining.
H112 Temper: Strain-hardened and partially annealed, providing increased strength and durability for structural applications.
Key Features
Corrosion Resistance: Excellent performance in seawater and marine environments due to a protective oxide layer.
Strength & Durability: Lightweight yet highly strong, suitable for marine structural components under dynamic loads.
Weldability: Easy to weld and assemble into complex marine structures without compromising integrity.
Formability: High ductility allows complex shaping and manufacturing versatility.
Heat Resistance: Maintains mechanical properties under elevated temperatures.
Specifications
| Parameter | Specification |
|---|---|
| Alloy | 5083 / 5383 |
| Temper | O, H112 |
| Diameter | 8–320 mm |
| Length | 1000–6000 mm |
| Standard | GB/T 26006-2010, GB/T 14846-2008, GB/T 6892-2015, EN 755 |
Selection Recommendations
Marine Environment: Prefer 5383-H116 or 5083-H116 for optimal seawater corrosion resistance.
Freshwater Environment: 5083-H112 or 5383-H112 offers good corrosion resistance with cost-effectiveness.
Industrial Environment: Select materials and surface treatments based on specific corrosive conditions.
Low Temperature: 5383 alloy is preferred due to superior mechanical properties in cold conditions.
Available Shapes
Round Bars
Most common isotropic mechanical properties.
Suitable for structural parts under uniform stress, such as ship masts and mechanical shafts.
Diameter range: 3–800 mm.
Square Bars
Higher bending strength and rigidity for support structures.
Ideal for right-angle connections and ship deck components.
Typical size: thickness 2–100 mm, width 10–500 mm.
Hexagonal Bars
High torsional resistance, suitable for torque applications.
Easy to operate with wrenches, commonly used in removable joints or hand tools.
Across-flat distance: 2–100 mm.
Rectangular Bars
Thickness 3–12 mm, customizable widths.
Suitable for ship bulkheads, architectural structures, and other applications.
All shapes share similar production processes, differing mainly in the extrusion die shape and subsequent processing. GNEE provides customized shapes according to customer specifications.
Production Tolerances
| Bar Type | Typical Tolerances |
|---|---|
| Round Bars | Diameter: ±0.05–0.3 mm; Length: ±10–50 mm |
| Square Bars | Size: ±0.1–0.5 mm; Length: ±10–50 mm |
| Hexagonal Bars | Across flat: ±0.1–0.5 mm; Length: ±10–50 mm |
Tolerances may vary depending on customer requirements, industry standards, and manufacturing capabilities. Tighter tolerances can be achieved through specialized processes, though costs may increase.
GNEE is a leading Chinese supplier of 5083 and 5383 marine-grade aluminum bars, providing high-quality materials for shipbuilding, offshore platforms, and other demanding marine applications.
