EN ISO 8256:2004

Plastics - Determination of tensile-impact strength (ISO 8256:2004)

Publication date:   Oct 31, 2006

General information

60.60 Standard published   Jul 1, 2004

CEN

CEN/TC 249 Plastics

European Norm

83.080.01   Plastics in general

Buying

Published

Language in which you want to receive the document.

Scope

ISO 8256:2004 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.
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.
These methods are applicable both to specimens prepared from moulding materials and to specimens taken from finished or semi-finished products (for example mouldings, films, laminates, or extruded or cast sheets).
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.
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.

Life cycle

PREVIOUSLY

Replaces
EN ISO 8256:1996

NOW

PUBLISHED
EN ISO 8256:2004
60.60 Standard published
Jul 1, 2004

REVISED BY

IN_DEVELOPMENT
prEN ISO 8256 rev