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Address: 2, Reading Road,
Edison New Jersey, USA -
Address: 2, Reading Road,
Edison New Jersey, USA
We are a leading manufacturer, exporter, and supplier of 5083 Aluminium Round Bars, supplying to shipbuilders, defence contractors, pressure vessel fabricators, and industrial buyers worldwide. Our 5083 Aluminium Round Bars are available in H111, H112, H116, H321, and O tempers — supplied with full ASTM B221, AMS 4057, and EN 755 certification, mill test reports, and competitive export pricing.
Also known as Marine Grade Aluminium Round Bar or Aluminum 5083 Round Bar, this non-heat-treatable alloy is widely regarded as the strongest non-heat-treatable aluminium grade — making it the first-choice specification for shipbuilding, offshore platforms, pressure vessels, cryogenic systems, and defence structures worldwide.
Aluminium 5083 is a non-heat-treatable alloy primarily composed of aluminium, magnesium, and manganese. It is best known for its excellent performance in extremely challenging environments, especially in marine and offshore applications. With a high magnesium content of 4.0–4.9%, 5083 achieves the highest strength of any non-heat-treatable aluminium alloy.
5083 Aluminium Round Bars are capable of withstanding extremely low temperatures without brittleness or loss of mechanical properties — making them particularly suited to cryogenic applications including LNG storage vessels and low-temperature process equipment.
With a tensile strength of up to 317 MPa in H116 temper, 5083 outperforms 5052, 5251, and 3003 in demanding structural and marine applications. Also known as Aluminum 5083 Round Bar, this alloy is the standard specification for shipbuilding globally.
Slightly strain-hardened during the extrusion process — the most common temper for extruded round bars. Offers excellent weldability and corrosion resistance with good structural properties (290 MPa tensile). Widely stocked and available for fast delivery.
As-fabricated with some strain hardening from hot working. Widely used for structural marine components and pressure vessel applications where standard mechanical properties are sufficient.
Fully annealed for maximum ductility and formability. Recommended for applications requiring extensive machining or cold forming operations.
Special marine temper strain-hardened to higher strength levels (317 MPa tensile). Developed to provide enhanced resistance to inter-granular corrosion, superior to H321 in marine environments. Used for marine hull plating, offshore structures, and classification society-approved shipbuilding components.
Strain-hardened and stabilised — specified for marine structural applications, particularly ship hulls and decks. Meets additional inter-granular corrosion resistance requirements of marine classification societies including Lloyd’s Register, DNV, and Bureau Veritas.
| Element | Content (%) |
|---|---|
| Aluminium (Al) | Balance |
| Magnesium (Mg) | 4.00 – 4.90 |
| Manganese (Mn) | 0.40 – 1.00 |
| Chromium (Cr) | 0.05 – 0.25 |
| Iron (Fe) | Max 0.40 |
| Silicon (Si) | Max 0.40 |
| Copper (Cu) | Max 0.10 |
| Zinc (Zn) | Max 0.25 |
| Titanium (Ti) | Max 0.15 |
| Property | H111 | H112 | H116 | O (Annealed) |
|---|---|---|---|---|
| Tensile Strength (MPa) | 290 | 270 | 317 | 275 |
| Yield Strength (MPa) | 145 | 125 | 228 | 125 |
| Elongation (%) | 16 | 14 | 10 | 16 |
| Brinell Hardness (HB) | 75 | 70 | 85 | 65 |
| Shear Strength (MPa) | 170 | 160 | 190 | 160 |
| Property | Value |
|---|---|
| Density | 2.66 g/cm³ |
| Melting Range | 570 – 640°C |
| Thermal Conductivity | 121 W/m·K |
| Electrical Conductivity | 29% IACS |
| Elastic Modulus | 70.3 GPa |
| Poisson’s Ratio | 0.33 |
| Property | Details |
|---|---|
| Grade | Aluminium Alloy 5083 (UNS A95083) |
| Tempers Available | H111, H112, H116, H321, O |
| Diameter Range | 6mm – 500mm |
| Length | 1000mm – 6000mm (custom cut available) |
| Manufacturing Method | Extruded / Hot rolled |
| Surface Finish | Mill finish, Rough turned, Bright, Peeled |
| Standards | ASTM B221, ASME SB221, AMS 4057, AMS 4058, EN 755-2, EN 485 |
| Equivalent Grades | UNS A95083, EN AW-5083, AlMg4.5Mn, 3.3547 |
5083 is the preferred choice for shipbuilding, hull construction, decks, and marine structural components. Its exceptional resistance to saltwater corrosion ensures a longer service life and minimal maintenance costs. Round bars are used for propeller shafts, rudder stocks, marine fittings, mooring equipment, anchor chains, and deck hardware on commercial vessels, naval ships, and offshore platforms.
5083 aluminium round bars are capable of withstanding extremely low temperatures without brittleness or loss of properties — making them the standard specification for cryogenic applications. Used in LNG storage tanks, liquid nitrogen vessels, liquid hydrogen systems, cryogenic pipework, and liquefied gas handling equipment where aluminium’s non-brittle behaviour at low temperatures is essential.
The combination of high strength and excellent weldability makes 5083 the standard specification for pressure vessel construction under ASME standards. Round bars are used in pressure vessel nozzles, flanges, support brackets, and internal structural components in chemical, petrochemical, and nuclear processing plants.
5083 aluminium round bars are ideal for structural parts and components requiring high strength and corrosion resistance in defence applications. Used in military vehicle armour plate supports, naval vessel structural components, submarine components, and defence infrastructure where the combination of strength, weight saving, and corrosion resistance is critical.
5083 round bars find application in high-stress structural components including crane booms, bridge elements, truck body frames, railroad car components, and drilling rig parts. The alloy’s high strength-to-weight ratio reduces overall vehicle weight while maintaining structural integrity under demanding load conditions.
5083 aluminium exhibits excellent resistance to corrosion in acidic environments and pitting resistance in chloride environments. It is specified for chemical plant piping, reaction vessel components, corrosive fluid handling equipment, and desalination plant components where resistance to chloride attack is essential.
| Property | 5083 | 5052 | 5251 |
|---|---|---|---|
| Mg Content | 4.0–4.9% | 2.2–2.8% | 1.7–2.4% |
| Tensile Strength | 290 MPa (H111) | 228 MPa (H32) | 190 MPa (H22) |
| Marine Corrosion Resistance | Excellent | Excellent | Very Good |
| Cryogenic Capability | Yes ✓ | No | No |
| Weldability | Excellent | Excellent | Excellent |
| Relative Strength | Highest | Medium | Medium-Low |
| Classification Society Approved | Yes ✓ | Limited | Limited |
| Best For | Shipbuilding, LNG, pressure vessels | Fuel tanks, general marine | Small boats, architecture |
| Primary Standard | ASTM B221 / AMS 4057 | ASTM B221 | EN 755-2 |
| Standard | Scope |
|---|---|
| ASTM B221 | US standard — extruded bars and shapes |
| ASME SB221 | Pressure vessel grade specification |
| AMS 4057 | Round bar — aerospace specification |
| AMS 4058 | Bars and rods — aerospace specification |
| EN 755-2 | European extruded round bar standard |
| EN 485 | Sheet, strip and plate (reference) |
| DNV / Lloyd’s Register | Marine classification (on request) |
| Bureau Veritas | Marine classification (on request) |
| UNS A95083 | Universal designation |
| DIN 3.3547 | German equivalent |
All 5083 Aluminium Round Bars are supplied with: Mill Test Report · Chemical Composition Certificate · Mechanical Properties Report · Heat Number Traceability · DNV / Bureau Veritas Inspection (on request) · Certificate of Origin for export.
5083 aluminium round bars are used extensively in shipbuilding, offshore oil and gas platforms, LNG cryogenic storage vessels, pressure vessels, defence structures, chemical processing plants, and heavy transport applications. The alloy is the global standard for marine structural applications due to its outstanding seawater corrosion resistance, high strength, and excellent weldability.
Yes. Among all non-heat-treatable aluminium alloys, 5083 offers the highest tensile strength — up to 317 MPa in H116 temper and 290 MPa in the standard H111 extruded bar temper. It significantly outperforms 5052 (228 MPa) and 5251 (190 MPa) in mechanical strength. For strengths above 317 MPa, heat-treatable alloys such as 6061 T6 or 7075 T6 are required.
H111 is slightly strain-hardened during extrusion — the standard temper for extruded round bars with good general-purpose properties (290 MPa tensile, excellent weldability). H116 is a special marine temper strain-hardened to higher strength (317 MPa tensile) with enhanced inter-granular corrosion resistance developed specifically for marine hull construction. H116 is the specified temper for classification society-approved shipbuilding materials.
Yes. 5083 aluminium round bars are capable of withstanding extremely low temperatures without brittleness or loss of mechanical properties. This makes them the standard specification for LNG storage vessels, liquid nitrogen systems, and cryogenic pipework — a unique capability that distinguishes 5083 from all other common aluminium alloys.
5083 aluminium round bars comply with ASTM B221 and ASME SB221 (for pressure vessel use), AMS 4057 and AMS 4058 (for aerospace and defence), and EN 755-2 (for European markets). Marine applications additionally require compliance with DNV, Lloyd’s Register, or Bureau Veritas specifications. The UNS designation is A95083 and the DIN equivalent is 3.3547.
Yes. We supply 5083 aluminium round bars with DNV and Bureau Veritas third-party inspection on request. H116 and H321 tempers are available with full marine classification documentation for shipbuilding and offshore applications. Contact us with your project specification, classification society requirement, and quantity for a tailored quote and delivery schedule.
Looking for a trusted 5083 Aluminium Round Bar manufacturer, exporter, and supplier? We supply marine-grade 5083 round bars in H111, H112, H116, and H321 tempers with full ASTM B221, AMS 4057, and DNV certification — competitive pricing and reliable delivery worldwide. Contact us today for a free quote and lead time confirmation.
+91 95166 18000
support@aluminiumtubes.org
