1.1 This International Standard specifies two methods (method A and method B) for the determination of
the tensile-impact strength of plastics under defined conditions. The tests can be described as tensile tests at
relatively high strain rates. These methods can be used for rigid materials (as defined in ISO 472), but are
especially useful for materials too flexible or too thin to be tested with impact tests conforming to ISO 179 or
ISO 180.
1.2 These methods are used for investigating the behaviour of specified specimens under specified impact
velocities, and for estimating the brittleness or the toughness of specimens within the limitations inherent in
the test conditions.
1.3 These methods are applicable both to specimens prepared from moulding materials and to specimens
taken from finished or semi-finished products (for example mouldings, laminates, or extruded or cast sheets).
1.4 Results obtained by testing moulded specimens of different dimensions may not necessarily be the
same. Equally, specimens cut from moulded products may not give the same results as specimens of the
same dimensions moulded directly from the material. Test results obtained from specimens prepared from
moulding compounds cannot be applied directly to mouldings of any given shape, because values may
depend on the design of the moulding and the moulding conditions. Results obtained by method A and
method B may or may not be comparable.
1.5 These methods are not suitable for use as a source of data for design calculations on components.
Information on the typical behaviour of a material can be obtained, however, by testing different types of test
specimen prepared under different conditions, and by testing at different temperatures. The two different
methods are suitable for production control as well as for quality control.
Diese Norm legt 2 Verfahren zur Bestimmung der Arbeit fest, die benötigt wird, um Probekörper aus Kunststoff unter einer festgelegten schlagartigen Zugbeanspruchung zu brechen. Die Prüfungen können als Zugversuche mit verhältnismäßig hoher Verformungsgeschwindigkeit bezeichnet werden. Entsprechend der Form der Probekörper sind unterschiedliche Parameter festgelegt. Diese Verfahren werden benutzt, um das Verhalten festgelegter Probekörper bei festgelegten Schlaggeschwindigkeiten zu untersuchen und die Sprödigkeit oder Zähigkeit von Probekörpern innerhalb der Grenzen der Prüfbedingungen festzustellen. Die Reaktion von Kunststoffen auf verhältnismäßig hohe Verformungsgeschwindigkeiten ist geeignet, das Verhalten von Materialien zum Beispiel bei Bewitterung oder thermischer Alterung zu beschreiben sowie ihre Eigenschaften unter den entsprechenden Einsatzbedingungen zu bewerten.