Core-Characteristics-of-5083-H112-aluminum-alloy-Sheet.pdf
5083-H112 aluminum alloy is a non-heat-treatable Al-Mg-Mn alloy primarily composed of aluminum, magnesium, manganese, and trace chromium. Known for its excellent corrosion resistance and high strength retention after welding, it is widely used in marine and industrial applications.
In the H112 temper, the alloy undergoes controlled strain hardening during manufacturing, optimizing its combination of strength, ductility, and corrosion resistance.
Applications of 5083 H112 Aluminum Plate
GNEE Aluminum supplies 5083 H112 plates, sheets, coils, and extrusions widely used in shipbuilding, structural engineering, and transportation sectors. The H112 temper indicates that the material has been slightly strain-hardened during processing without specific mechanical property limits, maintaining balanced strength and workability.
This alloy demonstrates excellent weldability with minimal loss of performance, a density of 2.66 g/cm³, and a thermal conductivity of about 117 W/m·K, making it suitable for marine, cryogenic (down to –195°C), and automotive applications.
Chemical Composition (UNS A95083 / ISO AlMg4.5Mn)
| Element | Content (wt%) |
|---|---|
| Aluminum | Balance (92.4–95.6) |
| Magnesium | 4.0–4.9 |
| Manganese | 0.4–1.0 |
| Chromium | 0.05–0.25 |
| Silicon | ≤ 0.40 |
| Iron | ≤ 0.40 |
| Titanium | ≤ 0.15 |
| Zinc | ≤ 0.25 |
| Copper | ≤ 0.10 |
| Others (each) | ≤ 0.05 |
| Total Others | ≤ 0.15 |
Physical Properties
Density: 2.66 g/cm³
Thermal Conductivity: 117 W/m·K
Coefficient of Thermal Expansion: 23.8 µm/m·°C (20–100°C)
Specific Heat Capacity: 0.9 J/g·°C
Melting Range: 591–638°C
Mechanical Properties
Ultimate Tensile Strength: 300 MPa (43.5 ksi)
Yield Strength (0.2% offset): 190 MPa (27.6 ksi)
Elongation at Break: ~16% (in 50 mm specimen)
Modulus of Elasticity: 70 GPa
Brinell Hardness: 81 HB
Shear Strength: ~180 MPa
Fatigue Strength: ~110 MPa
Temper Designation (H112)
H1x Series: Strain-hardened only (non-heat-treatable).
H112: Slightly strain-hardened and thermally stabilized to achieve balanced mechanical properties and ductility.
GNEE Aluminum 5083 H112 Supply Forms
| Form | Description |
|---|---|
| Plate | Heavy gauge material for ship hulls, tanks, and pressure vessels. |
| Sheet | For enclosures, panels, and lightweight structures. |
| Coil | For continuous forming, stamping, and rolling. |
| Round Bar/Rod | For shafts and structural fittings. |
| Flat Bar | For walkways, frameworks, and reinforcements. |
| Square/Rectangular Bar | For construction and architectural elements. |
| Pipe/Tube (Seamless or Welded) | For marine and industrial fluid systems. |
| Extrusions/Profiles | Custom profiles for decks, trailers, or frames. |
Typical Dimensions from GNEE Aluminum
| Form | Typical Range | Length Options |
|---|---|---|
| Sheet | 0.5–6 mm | Up to 4000 mm |
| Plate | 6–200 mm+ | 2000 × 4000 mm / custom sizes |
| Coil | 0.5–3 mm (width ≤ 1600 mm) | Coil weight 1–5 tons |
| Round Bar | Ø6–Ø300 mm | 3000 mm / custom |
| Flat Bar | 10×20 to 50×150 mm | 3000 mm / custom |
| Pipe/Tube | OD 10–300 mm; custom wall thickness | 3000 mm or per design |
| Extrusions | Custom shapes | Up to 6000 mm |
Core Characteristics of 5083 H112 Aluminum
1. Corrosion Resistance
5083 H112 has outstanding resistance to seawater and industrial atmospheres. Its high magnesium content (4.0–4.9%) forms a stable oxide film that prevents pitting and crevice corrosion, making it ideal for ship hulls, offshore platforms, port facilities, and seawater systems.
2. High Strength
Among non-heat-treatable alloys, 5083 H112 offers excellent strength and retains high mechanical performance in welded zones. It is commonly used for hull structures, decks, tanks, and high-pressure applications.
3. Weldability
This alloy provides excellent weldability with TIG, MIG, and resistance welding methods. Weld seams remain stable with minimal cracking risk. Although its machinability is moderate, proper tooling and cutting parameters allow precise machining.
4. Low-Temperature Performance
5083 H112 maintains and can even improve its strength and ductility at low temperatures, making it ideal for cryogenic tanks, refrigerated transport, and polar vessel structures.
5. Compatibility with Welding Technologies
Supports TIG, MIG, and advanced joining techniques such as Friction Stir Welding (FSW) and resistance spot welding, ensuring high joint integrity with low distortion-ideal for lightweight structural manufacturing.
6. Workability
Offers good hot workability and moderate cold-forming properties. In the annealed condition, it can be bent, stamped, or formed into large and complex parts.
Corrosion Resistance of 5083 H112
5083-H112 forms a dense oxide layer that protects it from seawater and chemical corrosion. It resists pitting and stress corrosion cracking, and anodizing can further enhance its surface durability-a key reason for its use in marine hulls and superstructures.
Weldability of 5083 H112
After welding (TIG/MIG/MMA), 5083 H112 retains about 90% of its original strength. Its low cracking tendency and good solid-solution hardening make it ideal for high-integrity welds. Friction Stir Welding can refine the grain structure, improving toughness and reducing porosity for shipbuilding and pressure vessel applications.
Formability and Machinability
The alloy has excellent cold forming (rolling, bending, stamping) and hot forming (300–450°C) capabilities with low springback. Machinability is fair; using sharp carbide tools and proper cooling helps prevent work hardening during cutting or drilling operations.
GNEE Aluminum, a leading Chinese supplier of marine-grade 5083 H112 aluminum, provides a complete range of plates, sheets, tubes, and extrusions with precise dimensional control and stable quality, serving the global shipbuilding, transportation, and industrial markets.
