DIN EN ISO 180:2013-08

This International Standard specifies a method for determining the Izod impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Test parameters are specified according to the type of material, the type of test specimen and the type of notch. The test method allows the investigation of the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions. The test method is suitable for use with the following range of materials: - rigid thermoplastic moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; - rigid thermosetting moulding materials, including filled and reinforced compounds; rigid thermosetting sheets, including laminates; - fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or non-unidirectional reinforcements such as mat, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres and sheet made from pre-impregnated materials (prepregs); - thermotropic liquid-crystal polymers. The method is not suitable for use with rigid cellular materials and sandwich structures containing cellular material. Also, notched specimens are not normally used for long-fibre-reinforced composites and thermotropic liquid-crystal polymers. The method is suited to the use of specimens which may be either moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished or semi-finished products such as mouldings, laminates and extruded or cast sheet. The method indicates preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, with different notches, or specimens which are prepared under different conditions can produce results which are not comparable. Other factors, such as the energy capacity of the pendulum, its impact velocity and the conditioning of the specimens can also influence the results. Consequently, when comparative data are required, these factors shall be carefully controlled and recorded. The method should not be used as a source of data for design calculations. Information on the typical behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch radius and/or the specimen thickness and by testing specimens prepared under different conditions. The standard includes Amendment 1 approved by CEN on 30 November 2012 and Amendment 2 approved by CEN on 21 March 2013. This standard differs from DIN EN ISO 180:2007-04 as follows: The European Amendment A2:2013 has been incorporated; a) the text of clause 9 has been replaced with "See Annex A."; b) Annex A (informative) "Precision statement" has been added; c) ASTM E691-11 has been added to the Bibliography. This document (EN ISO 180:2000 + A1:2006 + A2:2013) has been prepared by Technical Committee ISO/TC 61 "Plastics" (secretariat: SAC, China) in collaboration with Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by NBN, Belgium. The responsible German committee is Working Committee NA 054-01-02 AA "Mechanische Eigenschaften und Probekörperherstellung" ("Mechanical properties and preparation of test specimen") of the Plastics Standards Committee at DIN.