Aluminium and aluminium alloys
Selecting metal materials — Designation

The old French standard NF A 02-004 (1980) is still often used, but European standards EN 1780 and EN 1706 (1998) should be used.

• Numerical and symbolic designations always begin with the letters EN AC-. Then :

  • For the numerical designation, we have five digits:

    • the first gives the main alloying element:

      • 1: unalloyed aluminium,

      • 2: aluminum-copper,

      • 3: aluminum-manganese,

      • 4: aluminum-silicon,

      • 5: aluminum-magnesium,

      • 6: aluminum-magnesium-silicon,...