Division 1.1.2 Aluminium vessels

Non-alloy aluminium shall have an aluminium content of at least 99,5 % and the alloys referred to in point (b) of Article 1(1) shall display adequate resistance to intercrystalline corrosion at maximum working temperature.

Moreover, these materials shall satisfy the following requirements:

1. (a)

   they shall be supplied in an annealed state;

2. (b)

   they shall have the following mechanical characteristics per product:

   • the maximum tensile strength R_m,max shall be no more than 350 N/mm²,

   • the elongation after fracture shall be:

     • A ≥ 16 % if the test piece is taken parallel to the direction of rolling,

     • A ≥ 14 % if the test piece is taken perpendicular to the direction of rolling.