5083 Aluminium Plate

5083 is an aluminium–magnesium plate (Al–Mg) used where rust resistance, fatigue strength, and weldability have to sit in the same sheet. It is one of the most common marine and atmospheric corrosion grades in the 5xxx family. Strength is raised by cold work. The alloy is not heat-treatable. Plasticity stays high enough for forming, and the weld behaves well on ships, tanks, and structural fabrications.

Renaissance Fittings & Piping Inc. supplies 5083 plate, sheet, and coil to ASTM B209 and EN 485, with marine tempers to ASTM B928 and armour plate to MIL-DTL-46027 where the order calls for them. Aerospace sheet and plate for the same alloy is on the 5083 aerospace plate page.

Where 5083 plate is used

5083 plate is chosen when the job needs high plasticity and a reliable weld: ship hulls and LNG carriers, pressure vessels, refrigeration plant, lattice towers, drilling equipment, and transport bodies that also have to meet fire-protection rules.

Marine plate — H116, H321, H111

H116, H321, and H111 marine plate combines strength with a low weight and resistance to seawater. Yards use it for side shell, outer plating, and decks on large ships and smaller craft. Thicker plate is specified where the hull needs more durability. Standard marine thicknesses include 0.125 in, 0.25 in, and 0.375 in. A common blank is 60 in × 120 in. Longer ship plate is typically 96 in × 240 in and 96 in × 288 in.

Classification documents can be arranged with CCS, BV, LR, ABS, KR, DNV, RINA, and PC.

Armour plate — H131 and H32

H131 armour plate is used where the plate must resist projectile impact, keep corrosion resistance, and still weld. Typical duties are armour plate, personnel-carrier structure, and other defence fabrications. For H131 thicker than 0.499 in, a ballistic report can be issued when the purchase order asks for it. H32 armour plate is supplied to ASTM B209 in the sizes listed below.

Road and rail bodies

5083 plate is used for alloy tank-wagon bodies and tanks, vehicle fuel tanks, air reservoirs, bus skins, C82 coal-carrier bodywork, and roof or underbody guard plates.

Heavy and machined plate

Thicker 5083 plate is used for moulds, LNG tank plate, flange stock, GIS high-voltage switch housings, and precision machining.

Tread and chequer plate

5083 tread / chequer sheet is rolled from 0.8 mm to 8.0 mm. The pattern gives grip, and the alloy resists rust and general corrosion. Typical uses are refrigerated vehicle floors, car floors, stairs, decorative flooring, and anti-slip subway surfaces.

Equivalent designations

Hot-selling tempers: O, H111, H112, H321, H116, H131.

Supply range

Length: up to 6 m, fixed length, cut length, or a size cut to the drawing.

Surface: mill finish, bright, polished, hairline, brush, sand blast, checkered, embossed, etching.

Protective cover: blue film, transparent film, black-and-white film, or paper. Film thickness 50 microns or 80 microns.

Standards: ASTM B209, ASTM B928, MIL-DTL-46027, QQ-A-250/6. O-temper plate is also supplied to EN 485, AMS 4056, and AMS-QQ-A-250/6. Marine H116/H321 plate is supplied to ASTM B928, EN 485, and AMS-QQ-A-250/6. H131/H32 armour plate is supplied to MIL-DTL-46027, ASTM B209, and AMS-QQ-A-250/6.

If a size below is not the blank you need, the plate can be cut or rolled to order. Send the temper, thickness, and blank size with your enquiry.

5083 O plate — stock sizes (imperial)

Specification: ASTM B209, EN 485, AMS 4056, AMS-QQ-A-250/6.
Typical duty: cryogenic storage tanks, LNG storage tanks, pressure vessels.

5083 H116 / H321 marine plate — stock sizes (imperial)

Specification: ASTM B928, EN 485, AMS-QQ-A-250/6.

5083 H131 / H32 armour plate — stock sizes (imperial)

Specification: MIL-DTL-46027, ASTM B209, AMS-QQ-A-250/6.
Typical duty: naval vessels, tank armour plate, armoured personnel carriers.

5083 H111 sheet and plate — stock sizes (metric)

Specification: EN 485, AMS-QQ-A-250/6.
Typical duty: tank-car heads, bodies and baffles, and LNG storage tanks.

5083 H112 sheet and plate — stock sizes (metric)

Specification: ASTM B209, EN 485, AMS-QQ-A-250/6.

Chemical composition

Other elements: each ≤ 0.05; total ≤ 0.15.

Mechanical properties

Plate weight

Piece weight uses length, width, thickness, and the alloy density of 2.8 g/cm³:

Weight = Length (mm) × Width (mm) × Thickness (mm) × Density (2.8 g/cm³)

Use that figure to estimate consignment weight and how the plates will sit in a container. For a quick check on other shapes, use the metal weight calculator.

What buyers usually ask for with the plate

• Mill test and raw-material certificates, laboratory reports, fumigation certificates, a specification note, the commercial invoice, and a warranty, so the heat stays traceable.
• Export packing in fumigated wooden cases or on wooden pallets, to limit rust, scratches, and distortion in transit.
• Loading planned for a 20 ft container, a 40 ft container, or break-bulk, matched to the plate length.

Properties that matter on the shop floor

• Low mass compared with steel plate of the same area.
• Strong resistance to rust in a marine atmosphere.
• A clean surface and good flatness.
• Anodising response and solid mechanical behaviour.
• Strength above 1xxx and 3xxx plate: a medium-to-high strength alloy, with fatigue resistance and a weldable structure.
• Among the most weldable aluminium alloys, with high tensile strength and elongation.
• Formable during fabrication, and resistant to corrosion while it is being worked.
• The surface can be covered for packing and transit.
• Used on vehicles, ships, and LNG carriers because the weld and the fatigue life both hold up.
• Longer service life than a plain commercial aluminium plate in the same exposure.
• The metal can be recycled.

Other 5083 forms

The same alloy is also supplied as pipe and tube when the job is not a flat plate:

• 5083 aluminium pipe
• 5083 extruded tube

Round, square, and hex bar, plus O, H32, and H111 plate for aerospace and tanker service, can be quoted against the same chemistry when the drawing asks for them.

Other aluminium plate grades

• 1100 sheet and plate
• 2024 sheet and plate
• 3003 sheet and plate
• 5052 sheet and plate
• 5086 sheet and plate
• 6013 sheet and plate
• 6061 sheet and plate
• 7075 sheet and plate