5086 H111 aluminum sheet is a non-heat-treatable Al-Mg series alloy. Due to its superior corrosion resistance, excellent weldability, and medium-to-high strength, it is widely used in shipbuilding, marine engineering, transportation equipment, storage tanks, pressure vessels, and welded structural components. The alloy is based on aluminum with magnesium as the primary alloying element—typically at a concentration of 3.5%–4.5%—along with minor amounts of manganese (Mn), chromium (Cr), iron (Fe), and silicon (Si). Specific compositional limits should be verified according to standards such as ASTM B928, EN 573, or project-specific requirements.
The H111 temper is a designation for non-heat-treatable aluminum alloys. It indicates that the material has undergone annealing or hot working, resulting in a degree of strain hardening that is less than the level specified for the H11 temper. This temper is commonly applied to hot-rolled aluminum plates, thick plates, and products intended for subsequent welding or forming processes.
The 5086-H111 temper offers a balance between strength and workability, making it well-suited for cutting, bending, roll-forming, and welding. Actual tensile strength, yield strength, and elongation values may vary based on plate thickness, applicable standards, specimen orientation, and production processes; therefore, the Material Test Certificate (MTC) and the technical procurement agreement should be consulted for precise specifications.
Good Seawater Corrosion Resistance: Suitable for marine atmospheres, seawater splash zones, and humid industrial environments.
Good Weldability: Compatible with standard welding methods such as MIG and TIG, making it widely used in welded structures. Filler wires—such as those from the 5183 or 5356 series—should be selected based on design requirements and verified through a Welding Procedure Specification (WPS) qualification process.
Medium-to-High Strength: Generally stronger than aluminum alloys with lower magnesium content (e.g., 5052), making it suitable for structural components subject to specific loads.
Stable Low-Temperature Performance: Well-suited for applications such as cryogenic vessels and low-temperature transport equipment.
Not Heat-Treatable: Strength is primarily derived from alloy composition and work hardening.
5086 aluminum plates are typically available in thicknesses ranging from approximately 3.0 mm to 150 mm, with standard widths including 1000 mm, 1250 mm, 1500 mm, and 2000 mm. They can be supplied as standard-sized sheets or cut to specific dimensions. The maximum achievable width, length, and thickness depend on the capabilities of the hot-rolling and processing equipment.
Commonly referenced standards include:
ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.
ASTM B928/B928M: Standard Specification for 5xxx-Series Aluminum Alloy Plate for Marine Applications.
EN 485: Aluminum and Aluminum Alloys — Sheet, Strip, and Plate — Technical Conditions for Inspection and Delivery.
EN 573: Aluminum and Aluminum Alloys — Chemical Composition.
GB/T 3880: Wrought Aluminum and Aluminum Alloy Plates, Sheets, and Strips for General Industrial Use.
When used for ship hulls or offshore structures, projects may require additional specifications—such as classification society approval, ultrasonic testing, intergranular corrosion testing, re-verification of mechanical properties, or specific dimensional tolerances—which should be clarified during the inquiry stage.
5086-H111 aluminum sheets are suitable for:
Hull plating, decks, bulkheads, superstructures, and components for offshore platforms;
Storage and transport containers for LNG, chemical media, or other cryogenic substances;
Tanker trucks, bulk transport tanks, and vehicle structural components;
Port equipment, corrosion-resistant platforms, welded enclosures, and heavy-duty structural parts;
Equipment for seawater desalination, marine aquaculture, and coastal industrial facilities.
HC Aluminum offers 5086-H111 hot-rolled aluminum sheet plates and cut-to-size heavy plates. We provide professional assistance in determining specifications—including dimensions, surface finishes, testing requirements, compliance standards, and export packaging—tailored to your specific needs for marine, tank, or welded structural applications.