5083 Aluminium Plate for Hull, Deck and Tank Structures
H116 / H321 plate, 3–50 mm, cut-to-length to your nesting. Stock range for hulls, main decks, LNG tanks and tank-truck bodies.
Product views
5083-H116 mill-marked plate, yard stock, cut-to-length list and silo / tank applications.
Other 5xxx grades we supply
Same marine family, different balance of strength, formability and service temperature.
Which temper do you need?
Pick the stabilised temper for the exposure and forming requirements of each part.
The default stabilised temper for hull and weather-deck plating.
- 305 MPa tensile / 215 MPa proof min
- ASTM G66 & G67 qualified
- Splash zone & permanent immersion
Thermally stabilised; specified interchangeably with H116 for primary structure.
- Same minimum strength as H116
- Lower-temperature stabilisation
- Common in LNG secondary barrier
For formed panels and non-critical structure where forming wins over as-welded strength.
- 275–350 MPa tensile / 125 MPa proof min
- Deep panels, cabins, interiors
- O temper for bent parts
Where 5083 plate is used on board
Plate thickness starts at 3 mm; heavier sections carry primary loads.
Hull shell plating
Bottom and side shell in 4–20 mm H116/H321. Welded structure carries slamming, berthing and hydrostatic loads.
4–20 mmMain deck & platform
Non-skid or plain deck plating in 6–12 mm. Handles cargo loads and heavy traffic.
6–12 mmLNG tank & cryogenic support
5083 retains toughness at cryogenic temperatures. Used for secondary barrier, silo walls and tank-truck bodies.
3–6 mmTank truck body
Lightweight, corrosion-resistant welded tanks. 5083-H111 is the usual temper for tanker barrel sections.
5–6 mmWhy 5083 wins in marine service
Four numbers that decide the specification.
Same section modulus, lower centre of gravity and fuel burn.
Joint reaches parent-metal strength. No post-weld heat treatment.
Passes ASSET and NAMLT lot-release testing.
Above this long-term, 5454 is the usual alternative.
Real-world corrosion resistance
8-year atmospheric and splash-zone exposure data on Al–Mg 5xxx alloys.
- Stabilised tempers: H116/H321 keep intergranular and exfoliation corrosion low in continuous immersion and splash zones.
- Lot-release testing: ASTM G66 ASSET and G67 NAMLT confirm resistance to sensitisation before shipment.
- Design matters: isolate aluminium from dissimilar metals, avoid standing water in crevices, and stay below the 65 °C long-term ceiling.
Actual rates depend on local water chemistry, design and maintenance.
Mechanical properties
Minimum / typical values per ASTM B928 / B209. Certified values are shown on the EN 10204 3.1 mill test certificate supplied with each batch.
| Temper | Tensile Rm (MPa) | Proof Rp0.2 (MPa) | Elongation A50 (%) | Typical marine use |
|---|---|---|---|---|
| O | 270–345 | 115–200 | ≥16 | Deep-drawn and bent parts |
| H111 | 275–350 | ≥125 | ≥14 | Formed panels, cabins, interiors |
| H112 | 275–350 | ≥125 | ≥12 | Hot-rolled plate, non-critical structure |
| H116 | 305 min | ≥215 | ≥10 | Hull plating, splash zone, weather decks |
| H321 | 305–385 | ≥215 | 10–12 | Hull plating, LNG secondary barrier |
Plate above 40 mm thickness is rated at 285 MPa min tensile and 200 MPa min proof stress per ASTM B928.
5083 against the rest of the 5xxx family
Every grade below we supply. Choose on strength, forming and service temperature — not on habit.
| Alloy | Mg content (%) | Tensile Rm (MPa) | Proof Rp0.2 (MPa) | Marine corrosion | Best used for |
|---|---|---|---|---|---|
| 5083 | 4.0–4.9 | 305–385 | ≥215 | Excellent — G66/G67 | Hull, deck, LNG secondary barrier |
| 5086 | 3.5–4.5 | 275–345 | ≥195 | Excellent | Hull plating, fast craft, pressure vessels |
| 5754 | 2.6–3.6 | 215–275 | ≥130 | Very good | Superstructures, tanks, general fabrication |
| 5052 | 2.2–2.8 | 215–265 | ≥160 | Very good | Fuel tanks, panelling, ducting |
| 5454 | 2.4–3.0 | 240–290 | ≥180 | Excellent at temperature | Warm service above 65 °C, chemical carriers |
| 5182 | 4.0–5.0 | 275–350 | ≥130 | Good | Tank bodies, stiffeners, reinforcement |
Typical values for common marine tempers. Higher-magnesium grades give more strength but were designed for different forming limits — confirm the temper before substituting.
Marine standards & classification
Certification and testing that shipyard buyers actually ask for.
How we supply 5083 plate
From producing mill to yard, with independent QC at each step.
Cut-to-length
Plasma / saw cut to your nesting. Length up to 12,000 mm; width up to 2,650 mm.
CTLSea-export packing
Wooden stillage, edge protection, waterproof film. Steel strapping for heavy plate.
Per-batch certificate
EN 10204 3.1 MTC issued by the producing mill and countersigned by our QC team.
3.1 MTCFrequently asked questions
Which 5083 temper do I need for hull plating?
H116 is specified for most hull and splash-zone plating. H321 is accepted interchangeably and is often chosen for thicker sections or when the order references a wider thickness range.
What thickness and width can you supply?
3–50 mm thickness, widths up to 2,650 mm (3,000 mm on request), cut-to-length up to 12,000 mm.
Is 5083 plate suitable for LNG tanks?
Yes. 5083 retains toughness at cryogenic temperatures and is widely used for LNG secondary barrier and storage-tank walls.
Can you supply cut-to-size plate, or only standard sizes?
We supply cut-to-size. Send us your nesting or finished dimensions, and we will quote against your spec rather than a fixed stock list.
Do you have classification society certification?
DNV certification is available with the order; other major classification societies can be requested. An EN 10204 3.1 mill test certificate accompanies every batch.
What is the difference between 5083 plate and 5083 sheet?
Same alloy, different thickness ranges. Plate generally starts at 3 mm and is used for primary structure; sheet is thinner and is used for panels, decking and formed parts.
What filler wire should I use for welding 5083 plate?
ER5183 for high-strength joints; ER5356 for general fabrication where a small strength mismatch is acceptable.
What certificate comes with each order?
An EN 10204 3.1 MTC per batch, issued by the producing mill and countersigned by our QC team after independent re-inspection.
Need a 5083 marine quotation?
Send grade, temper, thickness, width and quantity — we quote against current mill availability.
Request a quoteEmail info@aymetals.comDelin Aluminum has supplied 5xxx marine plate and sheet for over 10 years. Material is sourced from mills holding DNV approval — the approval most marine buyers require — with other major classification societies available on request.
