AlMg

AlMg refers to aluminum-magnesium alloys, a family of aluminum alloys in which magnesium is the primary alloying element. The term is most commonly associated with the 5xxx series of the Aluminum Association, which includes alloys such as 5052, 5083, and 5086. These alloys are valued for combining light weight with good strength, formability, and corrosion resistance.

Composition and properties: In many 5xxx alloys magnesium typically ranges from about 2% to 5% by weight, with small additions of manganese and other trace elements. They are generally not heat-treatable; strength increases mainly through cold work and is maintained over a wide temperature range. The alloys offer a favorable strength-to-weight ratio, excellent formability, and very good corrosion resistance, especially in marine and atmospheric environments. They perform well at low temperatures and are suitable for extruded profiles, sheets, and plates.

Processing and fabrication: AlMg alloys are widely processed by rolling, extrusion, and forming. They are highly weldable and commonly used in welded structures, though the heat-affected zone can experience strength changes, so suitable welding procedures and filler metals are important. Annealing can restore ductility after substantial work hardening.

Applications: Commonly employed in shipbuilding, heavy-duty transport, pressure vessels, automotive components, aircraft interiors, and consumer products requiring light weight and corrosion resistance. Alloys such as 5083 and 5086 are standard in marine applications due to their resilience in seawater exposure.

Overall, AlMg alloys provide a versatile option for components where light weight, weldability, and corrosion resistance are prioritized, with strength controlled primarily by mechanical work rather than heat treatment.