Plastics - Determination of temperature of deflection under load - Part 1: General test method (ISO 75-1:2013)

ISO 75-1:2013 gives a general test method for the determination of the temperature of deflection under load (flexural stress under three-point loading) of plastics. Different types of test specimen and different constant loads are defined to suit different types of material.

Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 1: Allgemeines Prüfverfahren (ISO 75-1:2013)

Dieser Teil von ISO 75 zeigt ein allgemeines Prüfverfahren zur Bestimmung der Wärmeformbeständigkeitstemperatur von Kunststoffen unter Last (Biegespannung unter Dreipunktbelastung) auf. Für verschiedene Materialienarten sind unterschiedliche Probekörper und unterschiedliche konstante Lasten festgelegt.
ISO 75 2 zeigt spezielle Anforderungen an Kunststoffe (einschließlich gefüllte Kunststoffe und langfaserverstärkte Kunststoffe, bei denen die Faserlänge vor der Verarbeitung bis zu 7,5 mm beträgt) und Hartgummi auf, während ISO 75 3 spezielle Anforderungen an hochfeste, aushärtbare Schichtstoffe und langfaserverstärkte Kunststoffe aufzeigt, bei denen die Faserlänge mehr als 7,5 mm beträgt.
Die festgelegten Verfahren sind geeignet, das relative Verhalten verschiedener Materialien bei erhöhter Temperatur abzuschätzen, wenn die Temperatur unter Belastung mit einer vorgegebenen Heizrate erhöht wird. Die erhaltenen Ergebnisse stellen nicht unbedingt die maximalen Gebrauchstemperaturen dar, weil sich in der Praxis wesentliche Faktoren wie Zeit, Belastungsbedingungen und Biegespannung von den Prüf-bedingungen unterscheiden können. Eine wirkliche Vergleichbarkeit der Daten kann nur bei Materialien mit dem gleichen Biegemodul bei Raumtemperatur erreicht werden.
Die Verfahren legen Vorzugsmaße der Probekörper fest.
Die mit den beschriebenen Prüfverfahren ermittelten Daten sind nicht für eine Voraussage der Gebrauchstauglichkeit vorgesehen. Die Daten sind nicht für die Analyse von Gestaltung und Bemessung oder Vorhersage des Langzeitverhaltens (Lebensdauer) bei erhöhten Temperaturen von Materialien vorgesehen
Dieses Verfahren ist allgemein als HDT Prüfung (en: Heat Deflection Test oder Heat Distortion Test) bekannt, obwohl es kein offizielles Dokument gibt, in dem diese Benennung verwendet wird.

Plastiques - Détermination de la température de fléchissement sous charge - Partie 1: Méthode d'essai générale (ISO 75-1:2013)

L'ISO 75-1:2013 décrit une méthode d'essai générale permettant de déterminer la température de fléchissement sous charge (contrainte de flexion sous mise en charge en trois points) des plastiques. Différents types d'éprouvettes et différentes charges constantes sont définis pour correspondre à des types de matériaux différents.

Polimerni materiali - Ugotavljanje temperature upogiba pod obremenitvijo - 1. del: Splošna preskusna metoda (ISO 75-1:2013)

Ta del ISO 75 podaja splošno preskusno metodo za določanje temperature upogiba pod obremenitvijo (upogibna napetost pri tritočkovni obremenitvi) polimernih materialov. Različne vrste preskusnega vzorca in različna stalna bremena so določena tako, da ustrezajo različnim vrstam materiala. ISO 75-2 podaja posebne zahteve za polimerne materiale (vključno s polnjenimi polimernimi materiali in z vlakni ojačenimi polimernimi materiali, v katerih dolžina vlaken pred obdelavo meri do 7,5 mm) in ebonit, ISO 75-3 pa podaja posebne zahteve za duromerne laminate z visoko trdnostjo in z dolgimi vlakni ojačene polimere z dolžino vlaken, večjo od 7,5 mm. Navedene metode so primerne za ocenjevanje relativnega obnašanja različnih vrst materiala pri povišani temperaturi pod obremenitvijo pri določeni stopnji povečanja temperature. Pridobljeni rezultati ne predstavljajo nujno najvišje temperature uporabe, ker se v praksi ključni dejavniki, kot so čas, pogoji obremenitve in nominalna napetost površine, razlikujejo od preskusnih pogojev. Prava primerjava podatkov se lahko doseže pri materialih, ki imajo enak upogibni modul pri sobni temperaturi. Metode določajo prednostne dimenzije preskusnih vzorcev. Opisani podatki, pridobljeni s preskušanjem, niso namenjeni za predvidevanje dejanskega delovanja pri končni uporabi. Podatki niso namenjeni za analizo načrtovanja ali za napovedovanje vzdržljivosti materialov pri povišanih temperaturah. Ta metoda je splošno znana kot preskus HDT (preskus temperaturnega upogiba ali preskus temperaturnega popačenja), čeprav uradni dokument s tem poimenovanjem ne obstaja.

General Information

Status
Withdrawn
Publication Date
16-Apr-2013
Withdrawal Date
10-Mar-2020
Technical Committee
Drafting Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
11-Mar-2020

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SLOVENSKI STANDARD
SIST EN ISO 75-1:2013
01-september-2013
1DGRPHãþD
SIST EN ISO 75-1:2004

Polimerni materiali - Ugotavljanje temperature upogiba pod obremenitvijo - 1. del:

Splošna preskusna metoda (ISO 75-1:2013)

Plastics - Determination of temperature of deflection under load - Part 1: General test

method (ISO 75-1:2013)

Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 1: Allgemeines

Prüfverfahrenn (ISO 75-1:2013)

Plastiques - Détermination de la température de fléchissement sous charge - Partie 1:

Méthode d'essai générale (ISO 75-1:2013)
Ta slovenski standard je istoveten z: EN ISO 75-1:2013
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 75-1:2013 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 75-1:2013
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SIST EN ISO 75-1:2013
EUROPEAN STANDARD
EN ISO 75-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 83.080.01 Supersedes EN ISO 75-1:2004
English Version
Plastics - Determination of temperature of deflection under load
- Part 1: General test method (ISO 75-1:2013)
Plastiques - Détermination de la température de Kunststoffe - Bestimmung der

fléchissement sous charge - Partie 1: Méthode d'essai Wärmeformbeständigkeitstemperatur - Teil 1: Allgemeines

générale (ISO 75-1:2013) Prüfverfahren (ISO 75-1:2013)
This European Standard was approved by CEN on 21 March 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 75-1:2013: E

worldwide for CEN national Members.
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SIST EN ISO 75-1:2013
EN ISO 75-1:2013 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 75-1:2013
EN ISO 75-1:2013 (E)
Foreword

This document (EN ISO 75-1:2013) 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.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by October 2013, and conflicting national standards shall be withdrawn at

the latest by October 2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 75-1:2004.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 75-1:2013 has been approved by CEN as EN ISO 75-1:2013 without any modification.

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SIST EN ISO 75-1:2013
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SIST EN ISO 75-1:2013
INTERNATIONAL ISO
STANDARD 75-1
Third edition
2013-04-15
Plastics — Determination of
temperature of deflection under load —
Part 1:
General test method
Plastiques — Détermination de la température de fléchissement
sous charge —
Partie 1: Méthode d’essai générale
Reference number
ISO 75-1:2013(E)
ISO 2013
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SIST EN ISO 75-1:2013
ISO 75-1:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
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SIST EN ISO 75-1:2013
ISO 75-1:2013(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 3

5.1 Means of producing a flexural stress ................................................................................................................................... 3

5.2 Heating equipment .............................................................................................................................................................................. 3

5.3 Weights .......................................................................................................................................................................................................... 5

5.4 Temperature-measuring instrument ................................................................................................................................... 5

5.5 Deflection-measuring instrument .......................................................................................................................................... 5

5.6 Micrometers and gauges ................................................................................................................................................................. 5

6 Test specimens........................................................................................................................................................................................................ 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Shape and dimensions ...................................................................................................................................................................... 6

6.3 Specimen inspection .......................................................................................................................................................................... 6

6.4 Number of test specimens ............................................................................................................................................................. 6

7 Conditioning .............................................................................................................................................................................................................. 6

8 Procedure..................................................................................................................................................................................................................... 7

8.1 Calculation of force to be applied............................................................................................................................................ 7

8.2 Initial temperature of the heating equipment ............................................................................................................. 8

8.3 Measurement ............................................................................................................................................................................................ 8

9 Expression of results ........................................................................................................................................................................................ 9

10 Precision ....................................................................................................................................................................................................................... 9

11 Test report ................................................................................................................................................................................................................... 9

© ISO 2013 – All rights reserved iii
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SIST EN ISO 75-1:2013
ISO 75-1:2013(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International

Standards adopted by the technical committees are circulated to the member bodies for voting.

Publication as an International Standard requires approval by at least 75 % of the member bodies

casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 75-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.

This third edition cancels and replaces the second edition (ISO 75-1:2004), which has been technically

revised.

ISO 75 consists of the following parts, under the general title Plastics — Determination of temperature of

deflection under load:
— Part 1: General test method
— Part 2: Plastics and ebonite

— Part 3: High-strength thermosetting laminates and long-fibre-reinforced plastics

iv © ISO 2013 – All rights reserved
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SIST EN ISO 75-1:2013
ISO 75-1:2013(E)
Introduction

The first editions of this part of ISO 75 and ISO 75-2 described three methods (A, B and C) using different

test loads and two specimen positions, edgewise and flatwise. For testing in the flatwise position, test

specimens with dimensions 80 mm × 10 mm × 4 mm were required. These can be moulded directly or

machined from the central section of the multipurpose test specimen (see ISO 20753).

The previous (i.e. second) editions of this part of ISO 75 and ISO 75-2 specified the flatwise test position

as preferred, while still allowing testing in the edgewise position with the test conditions given in

Annex A until the next revision of this part of ISO 75 and ISO 75-2, as agreed in ISO/TC 61/SC 2/WG 5.

Therefore, with this revision, the edgewise test position will be removed.

At the time of publication, technical development of testing instruments made instruments based on a

fluidized bed or air ovens available. These are especially advantageous for use at temperatures at which

the common silicone oil-based heat transfer fluids reach their limit of thermal stability. The fluidized

bed and air oven methods of heat transfer are introduced in this part of ISO 75.

An additional precision statement covering the new heating methods is introduced in ISO 75-2.

© ISO 2013 – All rights reserved v
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SIST EN ISO 75-1:2013
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SIST EN ISO 75-1:2013
INTERNATIONAL STANDARD ISO 75-1:2013(E)
Plastics — Determination of temperature of deflection
under load —
Part 1:
General test method
1 Scope

This part of ISO 75 gives a general test method for the determination of the temperature of deflection

under load (flexural stress under three-point loading) of plastics. Different types of test specimen and

different constant loads are defined to suit different types of material.

ISO 75-2 gives specific requirements for plastics (including filled plastics and fibre-reinforced plastics

in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite, while ISO 75-3 gives specific

requirements for high-strength thermosetting laminates and long-fibre-reinforced plastics in which the

fibre length is greater than 7,5 mm.

The methods specified are suitable for assessing the relative behaviour of different types of material at

elevated temperature under load at a specified rate of temperature increase. The results obtained do not

necessarily represent maximum applicable temperatures because in practice essential factors, 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 flexural modulus.

The methods specify preferred dimensions for the test specimens.

Data obtained using the test methods described are not intended to be used to predict actual end-use

performance. The data are not intended for design analysis or prediction of the endurance of materials

at elevated temperatures.

This method is commonly known as the HDT test (heat deflection test or heat distortion test), although

there is no official document using this designation.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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 ebonite

ISO 75-3, Plastics — Determination of temperature of deflection under load — Part 3: High-strength

thermosetting laminates and long-fibre-reinforced plastics
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 20753, Plastics — Test specimens
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2013 – All rights reserved 1
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SIST EN ISO 75-1:2013
ISO 75-1:2013(E)
3.1
flexural strain

nominal fractional change in length of an element of the outer surface of the test specimen at midspan

Note 1 to entry: It is expressed as a dimensionless ratio or a percentage (%).
3.2
flexural strain increase
specified increase in flexural strain that takes place during heating
Note 1 to entry: It is expressed as a percentage (%).
Note 2 to entry:
...

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