This International Standard specifies a method for determining the tensile strain hardening exponent n of flat
products (sheet and strip) made of metallic materials.
The method is valid only for that part of the stress-strain curve in the plastic range where the curve is
continuous and monotonic (see 7.4).
In the case of materials with a serrated stress-strain curve in the work hardening range (materials which show
the Portevin-Le Chatelier effect, e.g. AIMg-alloys) the automatic determination (linear regression of the
logarithm true stress vs. the logarithm true plastic strain, see 7.7) should be used to give reproducible results.