5083 Aluminum Round Bar | Marine Grade ASTM B211

5083 aluminum bar stock supplier, Shenzhen Chinalcometal providing high-quality marine grade aluminum rod for CNC and precision machining applications. Manufactured in accordance with ASTM B211, 5083 aluminum round bar offers excellent corrosion resistance, superior weldability, and reliable strength in harsh marine environments. Available in tempers H112, H111, and O, it is an ideal choice for shipbuilding, offshore structures, and critical machined components.

5083 aluminum round bar stock specs: 

Available shapes: 

Round, Flat, square

Tempers:

• H112: As-fabricated condition with slight incidental work hardening.

• H111: Lightly work-hardened after annealing, slightly stronger than O.

• O temper: Fully annealed, softest state with best formability.

Standards: 

ASTM B211 / B221，EN 754 / EN 755

Chemical Composition (Typical)

• Al (Aluminum): Balance

• Mg (Magnesium): 4.0 – 4.9% (main strengthening element)

• Mn (Manganese): 0.4 – 1.0% (improves corrosion resistance and stability)

• Cr (Chromium): 0.05 – 0.25% (enhances stress corrosion resistance)

• Si (Silicon): ≤ 0.40%

• Fe (Iron): ≤ 0.40%

• Cu (Copper): ≤ 0.10%

• Zn (Zinc): ≤ 0.25%

• Ti (Titanium): ≤ 0.15%

Mechanical Properties (Typical, H111 / H112)

• Tensile Strength: 270 – 350 MPa

• 0.2% Proof Stress (Yield Strength): ≥ 125 MPa

• Elongation: ≥ 12%

• Brinell Hardness: ~70 HB

 Physical / Thermal Properties

• Thermal Conductivity: ~110 – 130 W/m·K

• Melting Range: 570 – 640 °C

• Density: ~2.66 g/cm³

• Elastic Modulus: ~70 GPa

 Surface Finish

• As-extruded: Standard industrial finish with slight extrusion marks

• Turned / Peeled: Improved dimensional accuracy and surface quality

• Polished: Used for aesthetic or low-friction applications

• Anodized (optional): Enhanced corrosion resistance and appearance

5083 aluminum round bar stock dimensions and sizes

5083 aluminum bar features 

• Marine-grade corrosion resistance 

• High strength-to-weight ratio 

• Great machinability in soft tempers (O, H111)

• Excellent weldability

5083 aluminum round bar manufacturing process

Our 5083 aluminum round bars are produced through hot extrusion or continuous casting and rolling, followed by precision cutting and surface conditioning.

• Extrusion Process: Heated 5083 billets are forced through a round die to create solid bars with uniform grain structure and excellent mechanical strength. This method ensures tight dimensional tolerances and minimal internal defects.

• Homogenization & Annealing: After extrusion, bars are homogenized and annealed to relieve internal stress and enhance formability.

• Surface Finishing: Each bar is straightened, deburred, and cleaned to provide a smooth surface—ideal for CNC machining and welding.

• Optional Ultrasonic Testing: For critical applications like pressure vessels or aerospace tooling, ultrasonic inspection ensures internal quality.

Typical Applications

5083 aluminum round bar is widely used in:

• Marine hardware – shafts, cleats, brackets, underwater fixtures

• LNG and pressure vessel components – connectors, reinforcement rods

• Machined parts – bushings, pins, spacers, flanges

• Defense and armored vehicles – anti-corrosion structural elements

Machining & Welding Tips

• For best results, use sharp carbide tools and apply coolant when machining.

• Use ER5356 aluminum filler rod when TIG or MIG welding to retain corrosion resistance.

• Bending is possible in O or H111 temper; avoid sharp radius bends.

Need 5083 aluminum round bar price or MTC, contact our sales, and if need sheet or plate, pls check out our 5083 aluminum plate – ideal for tank walls, decks, and large marine panels.