Marine 5083 H111 H114 H116 Aluminum Plate

Marine 5083 H111 H114 H116 aluminum plate is a high‑strength, corrosion‑resistant marine-grade alloy designed for shipbuilding, offshore platforms, hull structures, and cryogenic tanks. With superior seawater resistance, excellent weldability, and stable mechanical properties, 5083 marine plates in tempers H111, H114, and H116 deliver reliable performance in demanding saltwater and industrial environments.

Marine 5083 aluminum plate is an Al‑Mg alloy known for its outstanding corrosion resistance in seawater and harsh atmospheric conditions. In marine tempers H111, H114, and H116, it provides a balanced combination of strength, formability, and weldability, making it a core material for modern shipbuilding and offshore engineering.

Compared with conventional structural steels, 5083 marine plate offers significantly reduced weight while maintaining high stiffness and long service life, helping ship owners and fabricators lower fuel consumption, increase payload, and optimize lifecycle cost.

Features of Marine 5083 H111 / H114 / H116 Plate

• High resistance to seawater and chloride‑ion corrosion
• Good strength-to-weight ratio for light yet robust structures
• Excellent weldability with minimal loss of strength in welded zones
• Good formability for bending, rolling, and shaping complex hull forms
• Stable performance in low-temperature environments
• Non-heat-treatable alloy with reliable mechanical consistency

Typical Applications

Marine 5083 H111, H114, and H116 plate is widely used across:

• Shipbuilding

  • Hull shell plating
  • Side and bottom plating
  • Decks, bulkheads, and superstructures
  • Engine room platforms and access ways

• Offshore & Marine Engineering

  • Offshore platforms and jack-up rigs
  • Floating docks and pontoons
  • FPSO topsides and module structures

• Transport & Storage

  • LNG and cryogenic tanks
  • Pressure vessels and storage tanks
  • Vehicle and trailer bodies for coastal environments

• Industrial & Structural

  • Desalination equipment and piping systems
  • Saltwater cooling systems and condensers
  • Coastal building structures and walkways

Chemical Composition of 5083 Marine Aluminum

Typical composition limits (mass fraction, %) in line with common marine-grade standards such as EN 573 and ASTM B928:

Temper Descriptions: H111, H114, H116

Each temper defines a specific level of strain hardening and mechanical behavior:

Mechanical Properties (Typical Values)

Values can vary with thickness, exact specification, and standard. The following data is indicative for typical marine-grade 5083 plate.

Dimensional Range and Supply Conditions

Although exact dimensions may differ by producer, the following is typical for marine 5083 plates:

Corrosion Resistance and Marine Performance

Marine 5083 plate is specifically engineered to perform in aggressive chloride environments:

• Strong resistance to general corrosion and pitting in seawater
• Excellent performance in splash zones, tidal zones, and immersion service
• Suitable for contact with fresh water, industrial atmospheres, and many chemical environments
• Good resistance to stress corrosion cracking when used in approved marine tempers (especially H116)

To maximize service life, plates are often combined with:

• High‑performance marine coatings or antifouling systems
• Cathodic protection systems (sacrificial anodes or impressed current)
• Correct design to avoid stagnant seawater pockets and crevice corrosion

Weldability and Fabrication

5083 is one of the most weldable high‑strength aluminum alloys and is widely used in welded marine structures.

Recommended practices:

• Control heat input to avoid excessive softening
• Use compatible filler metals to preserve corrosion resistance
• Clean surfaces carefully before welding to remove oxide and contaminants

Comparison of H111, H114, and H116 in Marine Use

Quality Control and Standards

Marine 5083 plates are typically supplied according to recognized international marine and classification requirements:

Benefits for Shipyards and Fabricators

Using 5083 H111 H114 H116 marine aluminum plate helps:

• Reduce hull and superstructure weight for improved fuel efficiency
• Increase payload capacity and operational range
• Simplify fabrication with easy welding, cutting, and forming
• Extend service life in highly corrosive marine environments
• Lower overall maintenance and lifecycle costs

Quick Specification Snapshot

Marine 5083 H111 H114 H116 aluminum plate combines robust mechanical properties with outstanding seawater resistance and fabrication flexibility, making it a preferred choice for modern, lightweight, and durable marine and offshore structures.