1) LT for low
2) RT for room temperature.
NOTE 1. The
values for these materials apply to castings cast in
sand moulds of comparable thermal diffusivity. Subject
to amendments to be agreed upon in the order, they can
apply to castings obtained by alternative methods.
Whatever the method used for obtaining the castings, the
grades are based on the mechanical properties measured
on test pieces taken from samples separately cast in a
sand mould or a mould of comparable thermal diffusivity.
NOTE 3. 1N/mm2
is equivalent to 1 MPa.
NOTE 4. the
material designation is in accordance with EN 1560.