GNEE supplies 5083 H111 aluminum plate in stock sizes 10 mm to 40 mm at 2000 x 6000 mm - a marine-grade Al-Mg alloy with the highest strength among non-heat-treatable aluminum grades, retained strength after welding, and excellent formability for bending and tank fabrication. With 18 years of aluminum export experience, GNEE supports flexible MOQ for trial orders and bulk runs, ships with EN 10204 3.1 Mill Test Certificates, and arranges sea-worthy export packaging.
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What is 5083 H111 Aluminum Plate
5083 H111 aluminum plate is a non-heat-treatable Al-Mg (aluminum-magnesium) alloy in a lightly strain-hardened condition. It belongs to the 5000-series aluminum alloys, in which magnesium is the primary alloying element and the alloy cannot be strengthened by quenching and aging - strength comes from cold work (strain hardening) at the mill.
The "H111" temper designation breaks down as follows: the first "H" indicates strain hardening as the strengthening mechanism; "11" denotes a specific degree of cold work that places the plate between fully annealed (O) and a full H11 minimum; the trailing "1" indicates that the plate received additional slight work hardening during flattening or leveling operations but does not reach the minimum strength required for a full H11 temper. In practice this gives 5083 H111 the highest ductility and formability among the worked 5083 tempers, at the cost of lower tensile and yield strength than H116 or H321.
5083 plate is used where high strength, weldability and corrosion resistance must coexist: marine hulls and decks, LNG and cryogenic tanks, road and rail tankers, pressure vessels, automotive panels and EV battery enclosures, and structural fabrication in chemical plants.
Chemical Composition
Composition limits follow ASTM B209 and EN 573-3, which are aligned for this alloy. Values are in weight percent; "max" = upper limit only, ranges = minimum-maximum.
| Element | Min % | Max % | Role / Function |
|---|---|---|---|
| Magnesium (Mg) | 4.0 | 4.9 | Primary strengthening element via solid-solution strengthening; also drives seawater corrosion resistance. |
| Manganese (Mn) | 0.40 | 1.00 | Improves tensile strength, toughness and weldability; refines grain structure. |
| Chromium (Cr) | 0.05 | 0.25 | Stabilizes grain structure and inhibits recrystallization; raises stress-corrosion-cracking resistance. |
| Iron (Fe) | - | 0.40 | Controlled impurity; excess Fe forms brittle intermetallics. |
| Silicon (Si) | - | 0.40 | Controlled impurity; excess Si reduces ductility after welding. |
| Copper (Cu) | - | 0.10 | Deliberately kept low to minimize galvanic and intergranular corrosion risk. |
| Zinc (Zn) | - | 0.25 | Controlled impurity; protects anti-corrosion balance. |
| Titanium (Ti) | - | 0.15 | Grain refiner added during casting. |
| Others, each | - | 0.05 | Per-miscellaneous-element cap. |
| Others, total | - | 0.15 | Total miscellaneous cap. |
| Aluminum (Al) | - | Balance | Base metal. |
Mechanical Properties
Mechanical limits depend on temper. For 5083-H111 plate, minimum values per ASTM B209 / B241 (up to 200 mm thickness) and typical values for the supplied thickness range are listed below.
| Temper | UTS (MPa / ksi) | Yield Rp0.2 (MPa / ksi) | Elongation A50 (%) | Brinell Hardness (HB) |
|---|---|---|---|---|
| O (Annealed) | 275–350 / 40–51 | 125–200 / 18–29 | ≥ 14 | ≈ 70 |
| H111 (this product) | ≥ 275 / 40 | ≥ 125 / 18 | ≥ 12 | ≈ 75–90 |
| H112 (as fabricated) | ≥ 270 / 39 | ≥ 110 / 16 | ≥ 12 | ≈ 75–90 |
| H32 (strain-hardened + stabilized) | 305–380 / 44–55 | ≥ 215 / 31 | ≥ 10 | ≈ 90–100 |
| H116 (marine-optimized) | 305–385 / 44–56 | ≥ 215 / 31 | ≥ 10 | ≈ 95–105 |
| H321 (stabilized) | 305–385 / 44–56 | 215–295 / 31–43 | ≥ 10 | ≈ 95–105 |
Physical & Thermal Properties
| Property | Value (metric) | Value (imperial) | Notes |
|---|---|---|---|
| Density | 2.66 g/cm³ | 0.0961 lb/in³ | About one-third the weight of structural steel. |
| Melting range | 574–638 °C | 1065–1180 °F | Approximate solidus–liquidus. |
| Elastic modulus (tension) | 70.3 GPa | 10.2 × 10&sup6; psi | At 20 °C / 68 °F. |
| Shear modulus | 26.4 GPa | 3.83 × 10&sup6; psi | At 20 °C / 68 °F. |
| Poisson's ratio | 0.33 | - | Typical for Al-Mg alloys. |
| Thermal conductivity | 120 W/m·K | 69.4 Btu·in/(hr·ft²·°F) | At 25 °C / 77 °F. |
| Electrical resistivity | 0.58 × 10−6 Ω·m | 22.8 × 10−6 Ω·in | At 20 °C; volume conductivity about 29% IACS. |
| Coefficient of thermal expansion (20–100 °C) | 23.8 µm/m·°C | 13.2 × 10−6 in/in·°F | Mean CTE in this range. |
| Specific heat capacity | 900 J/kg·K | 0.215 Btu/(lb·°F) | Approximate, 0–100 °C. |
| Maximum continuous service temperature | 65 °C | 149 °F | Above this, 5083 is susceptible to stress-corrosion cracking and should not be specified. |
5083 H111 aluminum plate Specifications Table
5083 H111 plate in GNEE stock is supplied to the dimensions below. All plates are 2000 mm wide and 6000 mm long, with the six thickness variants listed. Plate thickness is selected to match common structural and tank-truck scantlings; custom thicknesses from 6 mm to 300 mm are available on inquiry.
| Alloy | Temper | Thickness (mm / in) | Width (mm / in) | Length (mm / in) | Typical use of this thickness |
|---|---|---|---|---|---|
| 5083 | H111 | 12 / 0.472 | 2000 / 78.7 | 6000 / 236.2 | Light marine panels, tank-truck head walls, automotive reinforcement. |
| 5083 | H111 | 20 / 0.787 | 2000 / 78.7 | 6000 / 236.2 | Hull side plating, deck plating, LNG tank shells. |
| 5083 | H111 | 20 / 0.787 | 2000 / 78.7 | 6000 / 236.2 | (Stock duplicate, kept for fast delivery on repeat orders.) |
| 5083 | H111 | 40 / 1.575 | 2000 / 78.7 | 6000 / 236.2 | Heavy hull plate, vehicle chassis cross members, offshore structures. |
| 5083 | H111 | 30 / 1.181 | 2000 / 78.7 | 6000 / 236.2 | Bulkheads, structural reinforcements, rail-car sidewalls. |
| 5083 | H111 | 25 / 0.984 | 2000 / 78.7 | 6000 / 236.2 | Pressure vessels, mid-thickness tank shells, deck superstructures. |
| Attribute | Specification |
|---|---|
| Standard | ASTM B209 / B209M, EN 485-2, EN 573-3, GB/T 3880.2 |
| Thickness tolerance | Follows ASTM B209 (typical ±0.05 mm for 2–5 mm gauge; ±0.08 mm for 5–8 mm gauge; wider tolerance for thicker plate per standard). |
| Width tolerance | 0 to +3 mm (typical plate stock). |
| Flatness | ≤ 3 mm per meter of length (standard plate); improved on inquiry. |
| Surface finish | Mill finish (standard); brushed, anodized, checkered, PVC film on request. |
| Edge condition | Mill edge (standard); slit or deburred edge on request. |
| Traceability | Heat number, MTC 3.1 per EN 10204, optional class society certificates (DNV, BV, LR, ABS, CCS). |
| Packaging | ISPM 15 wooden pallets, VCI film + edge protectors, steel strapping, seaworthy export packing. |
| Custom sizes | Width up to 2650 mm and length up to 12000 mm available on inquiry (non-standard). [To be confirmed: per inquiry.] |
Heat Treatment & Temper Guide
5083 is a non-heat-treatable Al-Mg alloy. Unlike 6061 or 7075, it cannot be strengthened by solution heat treatment and artificial aging. All 5083 tempers are produced by controlled rolling (cold work) and, for the higher-strength marine tempers, low-temperature stabilization.
| Temper | Process | Typical parameters |
|---|---|---|
| O (Annealed) | Full anneal | Heat to about 345 °C / 650 °F, hold, slow cool to remove work-hardening. |
| H111 | Hot roll + controlled cold roll to a slight reduction + flatten/straighten | Cold reduction intentionally held below the H11 minimum; final light flattening adds a small amount of strain hardening (the trailing "1" in H111). |
| H112 | Hot roll with controlled finishing temperature | No deliberate cold work; properties from hot-roll exit temperature only. |
| H32 / H34 | Cold roll + low-temperature stabilization | Stabilization typically 120–150 °C / 250–300 °F for 1–3 h to prevent age hardening at service temperature. |
| H116 | Strain-hardened from a higher temperature than H32, then stabilized for marine service | Stabilization 120–150 °C / 250–300 °F for several hours; intergranular corrosion tested per ASTM G66. |
| H321 | Strain-hardened then thermomechanically stabilized | Same as H116 but using a different mill processing route; both qualify for marine classification. |
Equivalent Designations
| Standard Body | Designation |
|---|---|
| AA (Aluminum Association, USA) | 5083 |
| UNS (USA) | A95083 |
| EN (Europe, numerical) | EN AW-5083 |
| EN (Europe, chemical symbol) | AlMg4.5Mn0.7 |
| DIN (Germany, legacy) | AlMg4.5Mn (Werkstoff 3.3547) |
| JIS (Japan) | A5083 (per JIS H 4000 / H 4040) |
| GB (China) | 5083 (per GB/T 3190; legacy LF4) |
| ISO | AlMg4.5Mn0.7 (per ISO 209-1) |
| AFNOR (France) | A-G4.5Mn |
| BS (UK) | 5083 / N8 (per BS 1470) |
| UNI (Italy) | P-AlMg4.4 |
5083 H111 aluminum plate Corrosion Resistance
5083 has the best general corrosion resistance of any non-heat-treatable aluminum alloy in marine service. Resistance across five environments is summarized below.
| Environment | 5083 H111 Behavior |
|---|---|
| Atmospheric (industrial / rural) | Excellent. Forms a stable passive oxide film; no protective coating required for most exposures. |
| Marine (continuous seawater, salt spray) | Excellent general and pitting resistance. For long-term immersion and exfoliation-critical service, specify H116 or H321 (thermo-mechanically stabilized); H111 is widely used for hull and deck plate where SCC risk is managed by design. |
| Galvanic (contact with dissimilar metals) | Sensitive to direct contact with copper, copper alloys and carbon steel in salt water. Use nylon, rubber or epoxy isolation washers and barrier coatings; never let copper piping drain onto aluminum plate. |
| Stress-corrosion cracking (SCC) | Low SCC susceptibility in H111 due to lower residual stress. For sustained tensile load above ~65 °C / 149 °F, SCC risk rises and H116 / H321 should be specified. |
| Surface-finish compatibility | Anodizing is possible but Mg-rich alloys tend to produce grey rather than decorative colors; powder coating, PVDF and marine-grade paint systems adhere well on properly pre-treated plate. |
Fabrication
Welding. 5083 H111 is rated among the most weldable aluminum alloys for structural fabrication. Both TIG (GTAW) and MIG (GMAW) are used. Two filler wires cover almost every application:
ER5356 - the standard choice for general marine and structural welding. Weld metal UTS typically 240–290 MPa. Good ductility, good color match after anodizing.
ER5183 - preferred for thicker plate and welded joints that must match 5083 parent metal tensile strength more closely. Weld metal UTS typically 270–310 MPa.
For service temperatures above 65 °C / 149 °F, ER5556 (highest strength of the three) is sometimes used, but at the cost of ductility. Do not use 4xxx-series fillers on 5083 - the resulting weld metal is anodic to the parent metal and accelerates corrosion.
Welded 5083 retains about 85–95% of parent-metal strength in the HAZ, which is the key advantage over heat-treatable 6xxx alloys where the HAZ softens. Balanced weld sequences, clamping/fixturing and controlled heat input minimize distortion; backing bars and root protection with argon are recommended for full-penetration joints.
Machining. 5083 H111 in the softest worked condition machines better than H116 / H321. Carbide tooling is preferred; tool geometry with positive rake, moderate speeds (~150–300 m/min with carbide on lighter cuts, ~80–150 m/min on heavy cuts) and adequate coolant give clean chips. Use aluminium-specific lubricants; avoid chlorinated cutting fluids on parts that will later be in marine service.
Forming. H111 is the chosen temper when bending, rolling and stamping are on the critical path. Typical minimum bend radii are 1.5–2× thickness for soft-axis bends, 3–4× thickness for hard-axis bends; deeper draws and complex stamping usually start from 5083-O. Strain hardening during forming may locally raise strength above the H111 baseline.
Surface Finishes
| Finish | Description | Typical use |
|---|---|---|
| Mill finish | As-rolled, standard mill surface, light rolling texture, no coating. | Default stock condition; structural fabrication. |
| Brushed | Directional satin polish. | Architectural panels, vehicle interiors, decorative parts. |
| Anodized (clear or dyed) | Electrochemical oxide layer; on 5083, color tends toward grey/charcoal. | Architectural, marine hardware where a hard, decorative surface is required. |
| Powder coated | Polyester / epoxy powder cured on pre-treated surface. | External panels, equipment housings, color-coded parts. |
| PVDF / fluorocarbon paint | High-durability resin coating (e.g. Kynar 500®). | Architectural cladding, coastal buildings, long-life facade. |
| Checkered / diamond plate | Raised pattern rolled into the surface for slip resistance. | Truck beds, vessel decks, walkways, anti-slip flooring. |
| PVC film / protective foil | Adhesive-backed plastic film applied at the mill. | Surface protection during cutting, forming and shipping. |
Applications of 5083 H111 aluminum plate
Marine - hulls, decks and superstructures of small commercial vessels, workboats and fishing boats. Why 5083: highest general corrosion resistance among non-heat-treatable alloys, retains weld strength, and H111 is the most formable temper for shaped plates.
Marine - LNG and cryogenic storage tanks. Why 5083: retains ductility and impact strength at sub-zero temperatures down to about -195 °C / -320 °F, unlike carbon steel which embrittles.
Road tankers - fuel, chemical and milk tank bodies. Why 5083: weld strength above 85% of parent, no HAZ softening, low weight increases payload, long service life against aggressive cargo and road salt.
Rail - high-speed train and metro car bodies. Why 5083: weight saving above 30% versus steel carbody, weldable for large structural assemblies, fatigue-resistant.
Automotive - bus skin, EV battery enclosures, floor panels. Why 5083 H111: deep-drawable in thin gauges (1–2 mm) for stamped parts, crash-energy-absorbing.
Pressure vessels - up to 65 °C / 150 °F per ASME BPVC. Why 5083: approved by class societies (DNV, BV, LR, ABS, CCS) for marine pressure vessels and by PED for non-marine process vessels.
Defense - armor plate and military vehicle structures. Why 5083: high strength-to-weight ratio in H32/H131/H136 variants; ballistic performance for light-armor applications.
Industrial - chemical tanks, hoppers, processing equipment, TV and telecom towers. Why 5083: resistance to industrial chemicals and atmospheric corrosion; weldable for on-site fabrication.
5083 vs Other Aluminum Alloys Comparison
The table below compares 5083 H111 with the most common marine and structural 5xxx alternatives and with 6061-T6, which is often requested but performs differently in seawater. All numbers are typical, not contractual minimums.
| Attribute | 5083-H111 | 5754-H111 | 5454-H111 | 5052-H32 | 6061-T6 |
|---|---|---|---|---|---|
| Series / system | Al-Mg (5xxx) | Al-Mg (5xxx) | Al-Mg-Mn (5xxx) | Al-Mg (5xxx) | Al-Mg-Si (6xxx, heat-treatable) |
| Typical UTS (MPa / ksi) | 275–350 / 40–51 | 215–285 / 31–41 | 250–305 / 36–44 | 215–265 / 31–38 | 290–340 / 42–49 |
| Typical Yield Rp0.2 (MPa / ksi) | 125–200 / 18–29 | 100–180 / 15–26 | 115–200 / 17–29 | 165–215 / 24–31 | 240–280 / 35–41 |
| Elongation A50 (%) | ≥ 12 | ≥ 14 | ≥ 12 | ≥ 6–10 | ≥ 8–10 |
| Density (g/cm³) | 2.66 | 2.67 | 2.69 | 2.68 | 2.70 |
| Seawater corrosion resistance | Highest among 5xxx | High | High | High | Lower (galvanic / pitting risk in salt water) |
| Fusion welding efficiency vs. parent | ~85–95% | ~85–95% | ~85–95% | ~85–95% | ~60–75% (HAZ softens) |
| Heat-treatable? | No | No | No | No | Yes (T6: solution + artificial age) |
| Max recommended service temperature | 65 °C / 149 °F | 80 °C / 176 °F | 65 °C / 149 °F | 65 °C / 149 °F | ≈ 200 °C / 392 °F |
| Indicative relative cost (5083-H111 = 1.0) | 1.00 | 0.90–0.95 | 0.95–1.00 | 0.85–0.95 | 1.00–1.10 |
| Best-fit application | Hulls, LNG, tankers, marine structural | Lower-stress marine, automotive panels | Tank trucks, pressure vessels | Sheet forming, fuel tanks | General structural, machined parts, no salt water |
Why Choose GNEE
18-year aluminum export experience. GNEE has shipped aluminum plate, sheet, bar, tube, pipe, profile, coil, strip, foil and fittings to more than 100 countries since 2008.
Flexible MOQ and 15–30-day lead time. Trial orders, mixed-size orders and bulk repeat runs are all welcome. Standard lead time for in-stock 5083 H111 plate (the six sizes listed above) is 15–30 days from PO, depending on quantity, packaging and destination; custom thicknesses add mill scheduling time which we confirm at quotation.
Mill Test Certificates to EN 10204 3.1 with every shipment. Each plate ships with chemical composition, mechanical test results and heat-number traceability. Third-party inspection (SGS, BV, TUV) is welcome and can be arranged at our facility.
Marine-class approvals on request. For shipyard and offshore orders, 5083 plate can be supplied with additional class society certifications (DNV, BV, LR, ABS, CCS) and tested to ASTM G66 (intergranular) and ASTM G67 (exfoliation).
Cut-to-size, surface protection and seaworthy packaging. Plates are cut to your dimension list with abrasive water-jet or CNC shear; PVC film, edge protectors, VCI paper, ISPM 15 wooden pallets and steel strapping protect the plate through container shipment and port handling.
English-speaking sales engineers with technical depth. Every inquiry is reviewed by an engineer who can answer questions on temper selection, weld procedure, MTC contents, and logistics documentation. We do not only quote - we help you specify the right plate for the service.
Send your plate size list and grade requirement for a firm offer →
FAQ
- 1. What does the H111 temper mean on 5083?
- H111 is a lightly strain-hardened temper. After hot rolling, the plate receives a small cold reduction (intentionally held below the H11 minimum) followed by flattening or leveling, which adds a slight further strain hardening (the trailing "1" in H111). The result is a "halfway stop" between fully annealed (O) and full H11: better formability and elongation than H116 / H321, at lower tensile and yield strength.
- 2. Can 5083 H111 plate be used in continuous seawater service?
- Yes, for general marine service including hulls, decks, superstructures and tank bodies. For long-term immersed applications where exfoliation and stress-corrosion-cracking resistance must be formally demonstrated, the thermomechanically stabilized tempers H116 or H321 are the stricter and more common choice. H111 remains appropriate for many hull-side and deck applications, and for tank-truck bodies that are not in continuous seawater immersion.
- 3. Which filler wire should I use to weld 5083 H111?
- ER5356 is the standard filler for general marine and structural welding. ER5183 is recommended when the weld metal tensile strength must more closely match the 5083 parent metal, especially for thicker plate and load-bearing joints. Both retain about 85–95% of parent-metal strength in the weld zone. Do not use 4xxx fillers on 5083.
- 4. Can 5083 H111 be heat treated to higher strength?
- No. 5083 is a non-heat-treatable Al-Mg alloy. Its strength comes solely from cold work. Higher-strength 5083 tempers (H32, H34, H116, H321) are produced by heavier controlled rolling and, for the marine tempers, low-temperature stabilization - not by quenching and aging.
- 5. What thickness range and plate sizes does GNEE stock in 5083 H111?
- GNEE stocks 5083 H111 plate in 12, 20, 30 and 40 mm thicknesses, all at 2000 x 6000 mm plate size (see the Product Specifications Table). On inquiry we can quote widths up to 2650 mm, lengths up to 12000 mm, and thicknesses from 6 mm to 300 mm. Thickness tolerance follows ASTM B209.
- 6. Does GNEE provide Mill Test Certificates and class society approvals?
- Yes. Mill Test Certificates to EN 10204 3.1 are standard, with chemical composition, mechanical test results and heat-number traceability. For marine orders, additional class-society certifications (DNV, BV, LR, ABS, CCS) and intergranular/exfoliation testing (ASTM G66, G67) can be arranged on request.