as Kiln Furniture
A cast plate has dimensions of 500 x 350
x 6 mm, the diagonal therefore having a length of approx.
610 mm. According to DIN 40 680-C-g a flatness tolerance along
the diagonal of 7.1 mm or 1.16 % would be permissible.
Current technology achieves a flatness tolerance for such
plates of at most 1.3 mm or 0.2 %.