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    Aluminium Alloy Selection Guide for GCC Projects
    Knowledge Center
    Aluminium · 6 min read

    Aluminium Alloy Selection Guide for GCC Projects

    The four most-used alloy families across GCC industry, what they excel at, and how to specify them without surprises at fabrication.

    The four families

    1xxx (pure aluminium): corrosion-resistant, soft, used in chemical equipment and electrical conductors. 3xxx (Al-Mn): moderate strength, formable; the workhorse for general sheet metal and roofing. 5xxx (Al-Mg, including 5052 and 5083): high corrosion resistance, weldable; the GCC marine and structural sheet standard. 6xxx (Al-Mg-Si, including 6061 and 6063): heat-treatable, extruded; the architectural and engineering structural grade.

    Marine, transport and outdoor

    For yacht hulls, marine equipment in Dubai and Sharjah ports, food processing tanks and outdoor signage exposed to coastal humidity, 5052 and 5083 are the default. 5083 has higher magnesium and is preferred where weld strength matters; 5052 is the formable workhorse.

    Architectural and structural

    6061-T6 is the standard for extrusions, structural members and machined parts. 6063 is the dedicated architectural extrusion alloy, used in window and curtain wall systems specified across UAE and KSA projects.

    Frequently asked questions

    What's the difference between 5052 and 5083?
    5083 has higher magnesium content (4-4.9% vs 2.2-2.8%), giving higher strength and better weld performance, at slightly reduced formability and higher cost.
    Can I use 6061 sheet on a marine project?
    Generally no; 6061's copper content reduces seawater corrosion resistance vs the 5xxx series. Use 5052 or 5083 for marine sheet.
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