5083 Aluminum Round Bar
The 5083 aluminum round bar is a cylindrical aluminum product made from 5083 aluminum alloy. The H116 temper is specifically designed to optimize corrosion resistance in marine environments, while H321 provides stability in high-temperature environments.
5083 aluminum round bar is a high-performance, non-heat-treatable aluminum-magnesium alloy known for its excellent corrosion resistance, good strength-to-weight ratio, and outstanding weldability—qualities that make it the material of choice for demanding marine, cryogenic, and structural applications.
It contains 4.0–4.9% magnesium along with trace amounts of manganese and chromium, offering both strength and resistance to seawater and industrial chemicals. The ultimate tensile strength of the 5083 aluminum round bar reaches up to 390 MPa, and it maintains good toughness even at temperatures as low as -195°C, preserving mechanical integrity in extreme environments and during welding operations. It complies with major standards such as ASTM B221, ISO 6361-2, and AMS 4156, with diameters ranging from a few millimeters to over 600 mm, and is available with various surface and temper treatments.
5083 aluminum round bar is a high-performance corrosion-resistant alloy primarily used in harsh environments, especially marine applications. This non-heat-treatable alloy achieves its mechanical properties through strain hardening. Common tempers include H111, H116, and H321.
5083 Aluminum Round Bar Standards and Supply
| Specification | Description |
| Standards | ASTM B221 (Extruded Bar) |
| AMS 4095 | |
| Diameter Range | Varies from a few millimeters to several inches |
| Common range is 0.25 inches to 24.00 inches | |
| Supply Tempers | H111 (As-rolled) |
| H321 (Strain-hardened and stabilized) | |
| H116 (Corrosion-resistant temper) | |
| Length | Standard length is 12 to 20 feet (3.66 – 6.1 meters) |
| Custom cutting available | |
| Surface Treatment Options | Mill Finish |
| Polished | |
| Anodized | |
| Classification Society Certifications | Certified by the following international classification societies, ensuring compliance with global marine standards: |
| CCS (China Classification Society) | |
| DNV (Det Norske Veritas) | |
| NK (Nippon Kaiji Kyokai) | |
| ABS (American Bureau of Shipping) | |
| BV (Bureau Veritas) | |
| LR (Lloyd’s Register) | |
| KR (Korean Register) |
5083 Aluminum Round Bar Stock
| Description | Diameter (inches) | Form |
| 5083-H111 Extruded Bar 0.375″ Diameter | 0.375″ | Round Bar |
| 5083-H111 Extruded Bar 0.750″ Diameter | 0.750″ | Round Bar |
| 5083-H111 Extruded Bar 1.000″ Diameter | 1.000″ | Round Bar |
| 5083-H111 Extruded Bar 1.500″ Diameter | 1.500″ | Round Bar |
| 5083-H111 Extruded Bar 2.500″ Diameter | 2.500″ | Round Bar |
| 5083-H111 Extruded Bar 3.000″ Diameter | 3.000″ | Round Bar |
| 5083-H111 Extruded Bar 4.000″ Diameter | 4.000″ | Round Bar |
| 5083-H111 Extruded Bar 8.000″ Diameter | 8.000″ | Round Bar |
| 5083-H116 Extruded Bar 0.25" Diameter | 0.25" | Round Bar |
| 5083-H116 Extruded Bar 0.5" Diameter | 0.5" | Round Bar |
| 5083-H116 Extruded Bar 1" Diameter | 1" | Round Bar |
| 5083-H116 Extruded Bar 2" Diameter | 2" | Round Bar |
| 5083-H116 Extruded Bar 3" Diameter | 3" | Round Bar |
| 5083-H116 Extruded Bar 4" Diameter | 4" | Round Bar |
| 5083-H116 Extruded Bar 6" Diameter | 6" | Round Bar |
| 5083-H116 Extruded Bar 8" Diameter | 8" | Round Bar |
| 5083-H116 Extruded Bar 10" Diameter | 10" | Round Bar |
| 5083-H116 Extruded Bar 12" Diameter | 12" | Round Bar |
| 5083-H116 Extruded Bar 24" Diameter | 24" | Round Bar |
| 5083-H321 Extruded Bar 0.25" Diameter | 0.25" | Round Bar |
| 5083-H321 Extruded Bar 0.5" Diameter | 0.5" | Round Bar |
| 5083-H321 Extruded Bar 1" Diameter | 1" | Round Bar |
| 5083-H321 Extruded Bar 2" Diameter | 2" | Round Bar |
| 5083-H321 Extruded Bar 3" Diameter | 3" | Round Bar |
| 5083-H321 Extruded Bar 4" Diameter | 4" | Round Bar |
| 5083-H321 Extruded Bar 6" Diameter | 6" | Round Bar |
| 5083-H321 Extruded Bar 8" Diameter | 8" | Round Bar |
| 5083-H321 Extruded Bar 10" Diameter | 10" | Round Bar |
| 5083-H321 Extruded Bar 12" Diameter | 12" | Round Bar |
| 5083-H321 Extruded Bar 24" Diameter | 24" | Round Bar |
5083 Aluminum Round Bar Chemical Composition
Elemental Composition
- Magnesium (Mg): 4.0 – 4.9% — Provides solid solution strengthening and corrosion resistance.
- Manganese (Mn): 0.4 – 1.0% — Refines grain structure and increases strength.
- Chromium (Cr): 0.05 – 0.25% — Enhances corrosion resistance and controls recrystallization.
- Aluminum (Al): Balance (≈ 92.6 – 95.6%).
- Trace elements (Fe, Si, Cu, Ti, Zn) all below 0.40%, which contribute to overall material stability without affecting weldability.
5083 Aluminum Round Bar Mechanical Properties
Tensile Strength and Hardness
- Ultimate Tensile Strength (UTS): 290 – 390 MPa, depending on the temper (e.g., H111 vs H32).
- Yield Strength (0.2% offset): 110 – 340 MPa; lower in O temper, higher in H tempers.
- Brinell Hardness: 75 – 110 HB.
5083 Aluminum Round Bar Fatigue, Fracture Toughness, and Low-Temperature Performance
- Fatigue Strength: 93 – 190 MPa under rotating bending.
- Fracture Toughness: Excellent, suitable for welding and low-temperature applications.
- Low-Temperature Strengthening: When cooled to –195 °C, UTS increases by approximately 40%, yield strength increases by about 10%.
5083 Aluminum Round Bar Physical and Thermal Properties
Density and Conductivity
- Density: 2.66 g/cm³.
- Electrical Conductivity: 16 – 19 m/Ω·mm² (≈ 28–34 % IACS).
5083 Aluminum Round Bar Thermal Conductivity and Expansion
- Thermal Conductivity: Up to 140 W/m·K.
- Coefficient of Thermal Expansion: 22.3 – 26 × 10⁻⁶ K⁻¹ in the range of -50 °C to 300 °C.
5083 Aluminum Round Bar Corrosion Resistance and Weldability
Due to its high magnesium content, 5083 exhibits excellent resistance to seawater and industrial chemical corrosion. It maintains full strength after MIG, TIG, and friction stir welding, making it ideal for welded structures without requiring post-weld heat treatment.
5083 Aluminum Round Bar Tempers and Surface Treatments
- O (Annealed): Offers the best ductility and formability.
- H111, H32: Strain hardened and stabilized, balancing strength and ductility.
- Surface Treatments: Hot-rolled pickling, cold-drawn bright finish, centerless grinding, peeling, turned finish, or anodizing (to enhance surface protection).
Machinability and Secondary Processing
5083 has moderate machinability; sharp tools, rigid setups, and appropriate cutting fluids are recommended to minimize work hardening. In O temper, it responds well to cold bending, stamping, and hydroforming.
Applications of 5083 Aluminum Round Bar
| Diameter (inches) | Diameter (mm) | Typical Applications |
| 0.25" | 6.35 mm | Precision components, rivets |
| 0.5" | 12.7 mm | Small structural parts, hardware fittings |
| 1" | 25.4 mm | Marine riveting components, mechanical brackets |
| 2" | 50.8 mm | Vehicle frames, medium load-bearing structures |
| 3" | 76.2 mm | Pressure vessel supports, marine deck parts |
| 4" | 101.6 mm | Large welded structures, bridge components |
| 6" | 152.4 mm | Heavy-duty machinery shafts, ship keels |
| 8" | 203.2 mm | Industrial equipment bases, offshore platform structures |
| 10" | 254 mm | Reinforcing rings for storage tanks, port facilities |
| 12" | 304.8 mm | Extra-large pressure vessels, ship hull frameworks |
| 24" | 609.6 mm | Special engineering (e.g., deep-sea equipment, drilling platforms) |
Marine and Shipbuilding Industry
Due to its seawater resistance, it is the preferred choice for hulls, decks, and superstructures. Used for ship frameworks, bulkheads, and offshore platforms.
Aerospace and Cryogenic Engineering
Suitable for fuel tanks, cryogenic containers, and structural components, with increased strength at low temperatures.
Automotive and Transportation
Used in truck bodies, rail vehicles, trailers, and heavy-duty vehicle components to reduce weight and enhance durability.
Pressure Vessels and Structural Components
Used in pressure vessels, heat exchangers, and structural frames where corrosion resistance and weldability are critical.
Widely used in marine components (hulls, railings), transportation (truck bodies, rail vehicles), cryogenic storage, and pressure vessels. Its non-magnetic and recyclable nature meets sustainable and specialized industrial requirements.
Notes
- Processing Requirements: Heat treatment strengthening should be avoided; inert gas shielded welding methods are preferred.
- Storage Conditions: Recommended to store in a dry environment to prevent surface oxidation, which could affect subsequent polishing.
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