Test Samples

Shown opposite are two sample geometries
used in the tensile testing of metals. The
wide ends of these are held in the sample
grips of the testing machine. The narrower
central region experiences the highest
stress values and the mechanical
deformation takes place in this region.

Flat test sample geometries are good for
evaluating materials to be used in plate form,
the round sample geometry is used for the
same materials if they are to be used as
extruded bars, forgings, or castings.