Ball test is an essay applied to the raw material to make sure they have been cross-rolled, which is an
imperative requirement for the fabrication of plowing discs. The test consists of applying load to a
1"(25,4 mm) ball, causing it to go through a pre-drilled hole of 1/2'' (12,7 mm) in the material. As a
result, any cracks should not exceed a diameter of 3" (76,2mm).