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ISO 527

1st Edition, November 1966

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Superseded By: ISO 527-1

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ENGLISH * W/D S/S BY ISO 527-1, 527-2, AND 527-3
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Description / Abstract:

This ISO Recommendation describes a method for determining the tensile properties of plastics in the form of standard test specimens tested under defined conditions of pretreatment, temperature, humidity and rate of separation of grips.

Three different test specimens are specified. The test specimen to be used for testing a given material is as specified in the specification for the material. The first test specimen (Type I, Fig. I) will normally be found suitable for materials, e.g. laminates based on thermosetting resins and many rigid thermoplastic moulding materials, having moderate elongations at break; the second (Type 2, Fig. 2) for materials, e.g. polyethylene and plasticized polyvinyl chloride, having relatively high elongations at break and the third (Type 3, Fig. 3) for thermosetting moulding materials.

Different rates of separation of grips are specified to suit the different materials to which the method can be applied. It is not possible to make a valid comparison between the results of tensile tests on different materials if the test specimens or the rates of straining or both are different.
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