DIN EN ISO 3167:2014-11

This International Standard specifies requirements relating to multipurpose test specimens for plastic moulding materials intended for processing by injection or direct compression moulding. Specimens of types A and B are tensile test specimens from which, with simple machining, specimens for a variety of other tests can be taken (see Annex A). Because they have such wide utility, these tensile specimens are referred to in this International Standard as multipurpose test specimens. The principal advantage of a multipurpose test specimen is that it allows all the test methods mentioned in Annex A to be carried out on the basis of comparable mouldings. Consequently, the properties measured are coherent as all are measured with specimens in the same state. In other words, it can be expected that test results for a given set of specimens will not vary appreciably due to unintentionally different moulding conditions. On the other hand, if desired, the influence of moulding conditions and/or different states of the specimens can be assessed without difficulty for all of the properties measured. For quality-control purposes, the multipurpose test specimen can serve as a convenient source of further specimens not readily available. Furthermore, the fact that only one mould is required may be advantageous. The use of multipurpose test specimens is to be agreed upon by the interested parties, because there may be significant differences between properties of the multipurpose test specimens and those specified in the relevant test methods. The main modification in comparison with the previous edition of this International Standard is the limitation of the tolerances of the shoulder radius of the test specimens of types A and B. Taking into consideration the fact that many of the die forms described in the previous edition are used, the modifications are for now only recommended. After the next revision, these modifications are intended to become obligatory, however. Therefore, a period of 10 years is intended to allow for gradual transition to the use of the new die forms. See also Annex B. With respect to DIN EN ISO 3167:2003-12, the dates in Clause 2 "Normative references" have been removed and Annex ZA (normative) has been deleted. This document (EN ISO 3167:2014) has been prepared by Technical Committee ISO/TC 61 "Plastics" in collaboration with Technical Committee CEN/TC 249 "Plastics" the secretariat of which is held by NBN. On the national level, the committee responsible for the standard is Working Committee NA 054-01-02 AA "Mechanische Eigenschaften und Probekörperherstellung" ("Mechanical properties and preparation of test specimens") of the DIN Standards Committee Plastics (FNK).