SCHEDULE 1Essential Safety Requirements

PART 1Materials

Aluminium vessels6

1

Non-alloy aluminium must have an aluminium content of at least 99.5% and the alloys referred to in regulation 2(1)(b) (interpretation) must display adequate resistance to intercrystalline corrosion at maximum working temperature.

2

Moreover, these materials must satisfy the following requirements—

a

they must by supplied in an annealed state;

b

they must have the following mechanical characteristics per product—

i

the maximum tensile strength Rm, max must be no more than 350 N/mm2,

ii

the elongation after fracture must be—

aa

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

bb

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