ISO 75-1-2020 pdf free.Plastics Determination oftemperature of deflection underload.
1.1 This document gives a general test method for the determination of the temperature of deflectionunder load (flexural stress under three-point loading) of plastics. Different types of test specimen anddifferent constant loads are defined to suit different types of material.
1.2ISO 75-2 gives specific requirements for plastics (including filled plastics and fibre-reinforcedplastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite, while lSO 75-3 givesspecific requirements for high-strength thermosetting laminates and long-fibre-reinforced plastics inwhich the fibre length, prior to processing, is greater than 7,5 mm.
1.3The methods specified are suitable for assessing the relative behaviour of different types ofmaterial at elevated temperature under load at a specified rate of temperature increase. The resultsobtained do not necessarily represent maximum applicable temperatures because, in practice, essentialfactors, such as time, loading conditions and nominal surface stress, can differ from the test conditions.True comparability of data can only be achieved for materials having the same room-temperature flexuralmodulus.
1.4 The methods specify preferred dimensions for the test specimens.
1.5 Data obtained using the test methods described are not intended to be used to predict actualend-use performance. The data are not intended for design analysis or prediction of the endurance ofmaterials at elevated temperatures.
1.6This method is commonly known as the heat deflection temperature or heat distortion temperature(HDT) test, although there is no official document using this designation.
2Normative references:The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.
ISo 75-2,Plastics —Determination of temperature of deflection under load —Part 2:Plastics and eboniteISO 75-3,Plastics — Determination of temperature of deflection under load – Part 3:High-strengththermosetting laminates and long-fibre-reinforced plastics
ISo 291,Plastics — Standard atmospheres for conditioning and testingISO 16012,Plastics — Determination of linear dimensions of test specimensIEC 60584-1, Thermocouples — Part 1: EMF specifications and tolerances
IEC 60751, Industrial platinum resistance thermometers and platinum temperature sensors.ISO 75 pdf download.