5083H111

5083H111 is a designation for the 5083 aluminum alloy in the H111 temper, as defined by the Aluminum Association. The 5083 alloy is a member of the 5xxx series, known for its good corrosion resistance, especially in marine environments, and for favorable weldability. The H111 temper indicates the material has been strain hardened and then partially stabilized by a light level of annealing, resulting in a balance of higher strength than the fully annealed state with maintained ductility and formability.

Composition and properties: 5083 is an Al-Mg-Mn alloy, with roughly 4.0–4.9% magnesium and 0.4–1.0% manganese, the remainder aluminum. This composition delivers excellent corrosion resistance, good strength for a non-heat-treatable alloy, and strong weldability. In the H111 temper, strength is enhanced by work hardening, while the partial anneal helps stabilize the temper to reduce the risk of work hardening during forming. The alloy is not hardened by subsequent age hardening or heat treatment beyond the initial forming process.

Fabrication and applications: 5083-H111 is widely used in welded fabrications and formed components where a combination of strength, formability, and corrosion resistance is desirable. It can be welded by common methods such as MIG or TIG, with attention to heat input to preserve properties and minimize distortion. Typical applications include marine structures, hull plates and other welded assemblies, as well as pressure vessels and other components exposed to corrosive environments.

Standards and availability: 5083-H111 is available in sheet and plate forms, and is specified under relevant regional standards for 5xxx-series alloys. It is commonly used where corrosion resistance and weldability are critical, and where moderate to high strength is required without heat treatment.