5083 H34

5083 H34 is a strain-hardened and stabilized aluminum alloy in the 5000 series, known for its high strength, excellent corrosion resistance, and good weldability.

5083 H34 is an aluminum alloy material belonging to the 5xxx Al-Mg alloy system, combining specific composition and processing conditions to offer medium strength and excellent corrosion resistance. H34 indicates the material has undergone cold working and partial annealing (stabilization treatment), reaching a semi-hard state. Compared to the H32 temper, H34 has a higher degree of work hardening, resulting in increased strength.

Semi-hard stabilized temper (H34): H34 is a strain-hardened, semi-hard temper achieved through low-temperature treatment. In practice, this means that 5083-H34’s strength falls between fully annealed (O) temper and full-hard (H38) temper. The low-temperature “baking” eliminates residual stress and prevents age hardening, resulting in stable performance. Compared to unstabilized alloys, this stabilization treatment improves ductility and resistance to stress corrosion cracking.

5083 H34 Aluminum

5083 H34 Product Forms (Sheets, Plates, Coils)

5083-H34 is available in various forged forms:

5083 Aluminum Plates/Sheets: Hot-rolled or cold-rolled plates and sheets, with thickness up to ~300mm (11.8 inches). Typical thickness range is approximately 0.2mm (0.008 inches) to ~300mm (11.8 inches). Common widths range from about 500-2500mm (20-98 inches), and lengths up to ~10, 000mm (394 inches). (Sheets less than 6mm thick are usually produced in H111 or H112 temper, while H34 is specified for thicker plates.)
5083 Aluminum Coils/Strips: Supplied as hot-rolled or cold-rolled coils, usually in thinner gauges (typically about 0.2–10mm or ~0.008–0.4 inches), with widths up to about 2000mm (80 inches) or more. Coils are commonly produced in cold-rolled H34 temper.
5083 Aluminum Bars/Rods: (H34 temper is uncommon; O/H111 tempers are more commonly used.)

5083 H34 Corrosion Resistance

5083-H34 performs well in harsh environments:

Marine applications: resistant to seawater and industrial chemicals
Temperature limitation: avoid prolonged use above 65°C (150°F) to prevent intergranular corrosion

Like all 5083 tempers, H34 offers outstanding resistance to seawater and saltwater corrosion—among the best of all aluminum alloys. Its resistance to marine corrosion and industrial chemicals makes it an ideal choice for shipbuilding and offshore applications.

5083 H34 Weldability and Post-Weld Strength

5083-H34 is easy to weld (preferred filler metals: 5183 or 5356), and retains relatively high strength after welding. The alloy overall "maintains excellent strength after welding"; the tensile strength in the weld zone of 5083 typically decreases by only about 7%, which is significantly less than softer alloys like 5052.

5083 H34 Strength vs. Ductility Trade-off

Compared to softer tempers, H34 offers higher strength but lower ductility. For example, 5083-O/H111 sheets (annealed or lightly processed) have a yield strength of about 125 MPa (approximately 18 ksi) and elongation of about 15%; in contrast, H34 has a yield strength of about 250 MPa (36 ksi) and elongation of only about 7–8%. Conversely, fully hard tempers (H38) have higher strength than H34 but very low elongation. H34 represents a balance: about halfway in hardness, offering medium ductility and stable strength.

5083 H34 Compared with Other Stabilized Tempers

5083-H116 and H321 are also stabilized tempers used in shipbuilding. H34 generally has higher strength than these tempers (H116/H321), though slightly lower ductility. H34 and H116/H321 all offer excellent corrosion resistance.

Temperature limitation: Like other 5083 tempers, due to strength loss, H34 should not be used at temperatures above ≈65°C (150°F). It also performs well at low temperatures (its strength actually increases when cooled to -195°C).

5083 H34 Fabrication and Processing

Weldability: Excellent weldability with recommended filler metals (5183, 5356, or 5556) during arc welding
Machinability: Poor machinability due to high ductility; special tools required
Hot working temperature: 316–482°C (600–900°F)
Annealing temperature: 413°C (775°F), no prolonged soaking needed

5083 H34 Aluminum Alloy Chemical Composition

5083-H34 is an Al–Mg alloy. Typical elemental ranges (by weight) are:

Aluminum (Al): balance (~92.5–95.5%)
Magnesium (Mg): 4.0–4.9%
Manganese (Mn): 0.4–1.0%
Chromium (Cr): 0.05–0.25%
Silicon (Si): up to 0.40%
Iron (Fe): up to 0.40%
Zinc (Zn): up to 0.25%
Titanium (Ti): up to 0.15%
Copper (Cu): up to 0.10%
Others (incl. Zr, Ni): trace, ≤0.15% each

5083 H34 Mechanical Properties

5083-H34 is a stabilized, strain-hardened "half-hard" condition aluminum alloy. Key mechanical properties are as follows:

Tensile Strength (Rm): Typically around 360 MPa (≈52 ksi). According to EN 485-3 standard, the tensile strength range for H34 sheets is approximately 340–400 MPa (≈49–58 ksi), depending on thickness.
Yield Strength (Rp0.2): Approximately 250 MPa (≈36 ksi) (minimum), with thicker sections showing yield strengths around 280–290 MPa (40–42 ksi).
Elongation: For material thicknesses of 3–12 mm (0.12–0.47 inches), elongation at break is about 7–8%. (Elongation slightly increases with plate thickness.)
Hardness: Brinell hardness around 99 HBW. (This is higher than the annealed H111 condition hardness of ~75 HB.)

5083 H34 Applications

5083 H34 Aluminum Applications in Marine Sector

5083-H34 plate combines high strength, good formability, and excellent corrosion resistance, widely used in shipbuilding and related industries as well as other structural applications. Typical applications include:

Marine construction: Hull and superstructure plates, decks, bulkheads, tanks, and piping on ships, offshore platforms, and fast boats. The seawater resistance and weldability of 5083-H34 plate make it an ideal choice for shipbuilding and marine frameworks. (Other common marine tempers include H111 and H116, but H34 plate is used where higher strength is required.)

Other Industries Using 5083 H34

Transportation: Structural components for heavy trucks, trailers (dump truck bodies), rail vehicles, buses, box vans, and other vehicles. Its high strength-to-weight ratio and corrosion resistance are highly valued in transport equipment.
Pressure Vessels and Tanks: Used for manufacturing welded tanks and pressure vessels for gases or liquids (e.g., storage tanks, cryogenic vessels).

The 5083-H34 alloy retains strength at low temperatures, making it suitable for manufacturing natural gas/liquefied natural gas (LNG) containers, cryogenic tanks, and high-pressure equipment.

Defense and Ballistics: Armor plates, military vehicle bodies, missile or rocket parts, and tanks. The alloy’s weldability, strength, and corrosion resistance make it highly suitable for military hulls and protective structures.
Industrial Structures: Mechanical equipment parts exposed to corrosive environments or high stress, such as drilling platforms, tanks, cooling towers, and structural supports. Its high hardness and moderate ductility are also used in industrial frames and containers.

Each application fully utilizes the advantages of 5083-H34: higher strength than typical aluminum-magnesium alloys (such as 5052) while maintaining excellent corrosion resistance. In marine and cryogenic service, it is the preferred material for hulls and LNG tanks; in transportation and defense, its high strength and good weldability are used for manufacturing panels and containers.

5083 H34 Standards and Designations

AA/UNS: AA5083-H34 / UNS A95083
International Equivalent Standards: EN AW-5083, AlMg4.5Mn (ISO), 3.3547 (DIN)
Specifications: ASTM B209, B928, AMS4058A

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