SIST EN ISO 6892-2:2026

• Abstract:

  This document specifies a method of tensile testing of metallic materials at temperatures higher than room temperature.

• Status: Not Published
• Public Enquiry End Date: 20-Apr-2025
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: PKG - Testing of metallic materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Aug-2026
• Due Date: 24-Oct-2026
• Ref Project: EN ISO 6892-2:2026 - Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature (ISO 6892-2:2026)

• Referred By: SIST EN 10217-2:2003 - Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 1559-2:2000 - Founding - Technical conditions of delivery - Part 2: Additional requirements for steel castings
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4800-002:2011 - Aerospace series - Titanium and titanium alloys - Technical specification - Part 002: Bar and section
• Effective Date: 19-Aug-2026
• Referred By: SIST EN ISO 14604:2016 - Fine ceramics (advanced ceramics, advanced technical ceramics) - Methods of test for ceramic coatings - Determination of fracture strain (ISO 14604:2012)
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4700-006:2011 - Aerospace series - Steel and heat resisting alloys - Wrought products - Technical specification - Part 006: Pre-production and production forgings
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4800-003:2012 - Aerospace series - Titanium and titanium alloys - Technical specification - Part 003: Tube
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 10253-4:2008 - Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 14917:2009+A1:2012 - Metal bellows expansion joints for pressure applications
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4700-001:2025 - Aerospace series - Steel and heat-resisting alloys - Wrought products - Technical specification - Part 001: Plates, sheets and strips
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 13322-1:2024 - Transportable gas cylinders - Refillable welded steel gas cylinders - Design and construction - Part 1: Carbon steel
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 10217-5:2003 - Welded steel tubes for pressure purposes - Technical delivery conditions - Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 14532-2:2005 - Welding consumables - Test methods and quality requirements - Part 2: Supplementary methods and conformity assessment of consumables for steel, nickel and nickel alloys
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 10088-5:2009 - Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4800-008:2012 - Aerospace series - Titanium and titanium alloys - Technical specification - Part 008: Pre-production and production castings
• Effective Date: 19-Aug-2026
• Referred By: SIST EN 4700-004:2026 - Aerospace series - Steel and heat-resisting alloys - Wrought products - Technical specification - Part 004: Wires
• Effective Date: 19-Aug-2026

Overview

SIST EN ISO 6892-2:2026 is an international standard that specifies the method for tensile testing of metallic materials at elevated temperatures, i.e., above room temperature. Published by the Slovenian Institute for Standardization (SIST), this standard adopts ISO 6892-2:2026 and supports consistent mechanical testing practices for metals subjected to heat. Adhering to this standard ensures reliable, reproducible test results that are critical for product development, quality control, and regulatory compliance in industries where materials experience high temperatures, such as aerospace, automotive, and energy sectors.

Key Topics

• Scope & Purpose
  Defines the procedures for determining key mechanical properties (e.g., tensile strength, yield strength, elongation, reduction of area) of metallic materials when tested at specified temperatures above 35°C.

• Test Equipment
  Outlines requirements for calibrated force-measuring systems, extensometers, and heating devices (e.g., furnaces or ovens). Emphasizes strict control of temperature measurement, resolution (1°C or better), and monitoring during the test process.

• Sample Preparation
  References ISO 6892-1 for test piece geometries and preparation, including original measurement at room temperature but testing at the elevated target temperature.

• Testing Methods

  • Method A: Strain rate control with tight tolerances to minimize measurement uncertainty.
  • Method B: Traditional strain rate ranges for broader applicability.
  • Specifies selection and documentation of the test method and corresponding strain rates.

• Temperature Control
  Highlights the importance of precise temperature stabilization ("soaking time") and documentation of deviations and measurement uncertainties.

• Reporting Requirements
  Lists mandatory elements for test reports, including reference to this standard, test conditions, material identification, soak times, test temperatures, extensometer settings, and all relevant results.

Applications

SIST EN ISO 6892-2:2026 is crucial for any context where metals are expected to retain specific mechanical properties at temperatures higher than room temperature. Its typical applications include:

• Material Qualification
  Ensuring that metallic materials used in components (e.g., turbine blades, engine parts) meet performance criteria under operational heat conditions.

• Quality Control
  Routine batch testing during metal production or processing to maintain consistent material performance standards.

• Research & Development
  Supporting material scientists and engineers in investigating the behavior of new metal alloys or treatments designed for high-temperature environments.

• Regulatory Compliance
  Providing recognized evidence for meeting contractual, safety, or statutory requirements, especially when referenced by product standards or regulations.

• Failure Analysis
  Offering structured testing methodology for root cause analysis of metallic component failures related to temperature-induced property changes.

Related Standards

SIST EN ISO 6892-2:2026 is part of a comprehensive suite for mechanical testing of metals, and its application is often aligned with or complemented by the following standards:

• ISO 6892-1: Metallic materials – Tensile testing – Part 1: Method of test at room temperature
• ISO 7500-1: Calibration and verification of static uniaxial testing machines
• ISO 9513: Calibration of extensometer systems used in uniaxial testing
• EN standards for mechanical and physical testing in specific products or sectors

Adhering to these standards supports internationally recognized best practices for materials testing, instrumentation, and reporting, facilitating compliance and mutual recognition across laboratories and industries globally.

By conforming to SIST EN ISO 6892-2:2026, organizations can ensure reliable assessment of metallic materials’ mechanical properties at elevated temperatures, essential for safety, performance, and durability in demanding applications.

SLOVENSKI STANDARD
oSIST prEN ISO 6892-2:2025
01-april-2025
Kovinski materiali - Natezni preskus - 2. del: Metoda preskušanja pri povišani
temperaturi (ISO/DIS 6892-2:2025)
Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature
(ISO/DIS 6892-2:2025)
Metallische Werkstoffe - Zugversuch - Teil 2: Prüfverfahren bei erhöhter Temperatur
(ISO/DIS 6892-2:2025)
Matériaux métalliques - Essai de traction - Partie 2: Méthode d'essai à température
élevée (ISO/DIS 6892-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 6892-2
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
oSIST prEN ISO 6892-2:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 6892-2:2025
oSIST prEN ISO 6892-2:2025
DRAFT
International
Standard
ISO/DIS 6892-2
ISO/TC 164/SC 1
Metallic materials — Tensile
Secretariat: AFNOR
testing —
Voting begins on:
Part 2: 2025-01-31
Method of test at elevated
Voting terminates on:
2025-04-25
temperature
Matériaux métalliques — Essai de traction —
Partie 2: Méthode d'essai à température élevée
ICS: 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
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BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 6892-2:2025(en)
oSIST prEN ISO 6892-2:2025
DRAFT
ISO/DIS 6892-2:2025(en)
International
Standard
ISO/DIS 6892-2
ISO/TC 164/SC 1
Metallic materials — Tensile
Secretariat: AFNOR
testing —
Voting begins on:
Part 2:
Method of test at elevated
Voting terminates on:
temperature
Matériaux métalliques — Essai de traction —
Partie 2: Méthode d'essai à température élevée
ICS: 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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RECIPIENTS OF THIS DRAFT ARE INVITED
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 6892-2:2025(en)
ii
oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and designations . 2
5 Principle . 3
6 Test piece . 3
7 Determination of original cross-sectional area (S ) . 3
o
8 Marking the original gauge length (L ) . 3
o
9 Apparatus . 3
10 Test conditions . 5
10.1 Setting the force zero point .5
10.2 Gripping of the test piece, fixing of the extensometer and heating of the test piece, not
necessarily in the following sequence .5
10.2.1 Method of gripping .5
10.2.2 Fixing of the extensometer and establishing the gauge length .5
10.2.3 Heating of the test piece .6
10.3 Testing rate based on strain rate control (Method A) .6
10.3.1 General .6
10.3.2 Strain rate for the determination of the upper yield strength (R ) or proof
eH
strength properties (R and, if required, R ) .6
p t
10.3.3 Strain rate for the determination of the lower yield strength (R ) and
eL
percentage yield point extension (A ), if required .7
e
10.3.4 Strain rate for the determination of the tensile strength (R ), percentage
m
elongation after fracture (A), percentage reduction area (Z), and, if required,
percentage total extension at the maximum force (A ), percentage plastic
gt
extension at maximum force (A ).7
g
10.4 Method of testing with expanded strain rate ranges (Method B) .7
10.4.1 General .7
10.4.2 Rate for the determination of yield strength or proof strength properties .7
10.4.3 Rate for the determination of tensile strength .8
10.5 Choice of the method and rates .8
10.6 Documentation of the chosen testing conditions .8
11 Determination or calculation of the properties . 8
12 Test report . 8
13 Measurement uncertainty . 9
14 Figures . 9
15 Annexes . 10
Annex A (informative) Addition to ISO 6892-1:2016, Annexes B and D .11
Annex B (informative) Measurement uncertainty . 17
Bibliography .20

iii
oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee
SC 1, Uniaxial testing.
This second edition cancels and replaces the first edition (ISO 6892-2:2011), of which it constitutes a minor
revision.
The main changes compared to the previous edition are as follows:
— a note has been added after the first sentence of 10.2.1;
— some references to subclauses of ISO 6892-1 have been deleted.
A list of all parts in the ISO 6892 series can be found on the ISO website.

iv
oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
Introduction
In this document, two methods of testing speeds are described. The first, Method A, is based on strain rates
(including crosshead separation rate) with narrow tolerances (±20 %) and the second, Method B, is based
on conventional strain rate ranges and tolerances. Method A is intended to minimize the variation of the
test rates during the moment when strain rate-sensitive parameters are determined and to minimize the
measurement uncertainty of the test results.
The influence of the testing speed on the mechanical properties, determined by the tensile test, is normally
greater at an elevated temperature than at room temperature.
Traditionally, mechanical properties determined by tensile tests at elevated temperatures have been
determined at a slower strain or stressing rate than at room temperature. This document recommends the
use of slow strain rates but, in addition, higher strain rates are permitted for particular applications, such as
comparison with room temperature properties at the same strain rate.
During discussions concerning the speed of testing in the preparation of this document, it was decided to
consider deleting the stress rate method in future revisions.

v
oSIST prEN ISO 6892-2:2025
oSIST prEN ISO 6892-2:2025
DRAFT International Standard ISO/DIS 6892-2:2025(en)
Metallic materials — Tensile testing —
Part 2:
Method of test at elevated temperature
WARNING — This document calls for the use of substances and/or procedures that can be injurious
to health if adequate safety measures are not taken. This document does not address any health
hazards, safety or environmental matters associated with its use. It is the responsibility of the user
of this document to establish appropriate health, safety and environmentally acceptable practices.
1 Scope
This document specifies a method of tensile testing of metallic materials at temperatures higher than room
temperature.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6892-1 apply with the following
exceptions and supplements.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
In general, all test piece geometries/dimensions are based on measurements taken at room temperature.
The exception may be the extensometer gauge length (see 3.3 and 10.2.2).
NOTE The following properties are typically determined at elevated temperature unless other properties defined
in ISO 6892-1 are required by relevant specifications or agreement:
— proof strength, plastic extension (R );
p
— tensile strength (R );
m
— percentage elongation after fracture (A);
— percentage reduction of area (Z).

oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
3.1
original gauge length
L
o
Distance between gauge length marks on the test piece measured at room temperature before heating of the
test piece and before application of force
3.2
percentage elongation after fracture
A
permanent elongation at room temperature of the gauge length after fracture (L − L )
u o
Note 1 to entry: It is expressed as a percentage of the original gauge length (L ) (3.1).
o
Note 2 to entry: For further details, see ISO 6892-1.
3.3
extensometer gauge length
L
e
length within the parallel portion of the test piece used for the measurement of extension (3.4) by means of
an extensometer
3.4
extension
increase in the extensometer gauge length (L ) (3.3) at a given moment during the test
e
3.5
percentage extension
extension (3.4) expressed as a percentage of the extensometer gauge length (L ) (3.3)
e
3.6
percentage reduction of area
Z
maximum change in cross-sectional area which has occurred during the test (S − S )
o u
Note 1 to entry: It is expressed as a percentage of the original cross-sectional area (S ), where S and S are calculated
o o u
from the dimensions at room temperature.
3.7
stress
R
force at any moment during the test divided by the original cross-sectional area (S ) of the test piece
o
Note 1 to entry: All stresses referred to in this document are engineering stresses, calculated using the cross-sectional
area of the test piece derived from dimensions measured at room temperature.
3.8
soaking time
t
s
time taken to stabilize the temperature of the test piece prior to mechanical loading
4 Symbols and designations
ISO 6892-1 provides an extensive listing of symbols and their related designations.
The additional symbols used in this document are given in Table 1.

oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
Table 1 — Symbols and designations
Symbol Unit Designation
T °C specified temperature or nominal temperature at which the test should be performed
T °C indicated temperature or measured temperature on the surface of the parallel length of the
i
test piece
t min soaking time
s
5 Principle
The test involves straining a test piece by tensile force for the determination of one or more of the mechanical
properties defined in Clause 3.
The test is carried out at a temperature higher than 35 °C, which means at temperatures higher than room
temperature as specified in ISO 6892-1.
6 Test piece
For requirements concerning test pieces, see ISO 6892-1.
NOTE Additional examples of test pieces are given in Annex A.
7 Determination of original cross-sectional area (S )
o
For requirements concerning determination of the original cross-sectional area, see ISO 6892-1.
NOTE This parameter is calculated from measurements taken at room temperature.
8 Marking the original gauge length (L )
o
For requirements concerning marking the original gauge length, see ISO 6892-1.
9 Apparatus
9.1 Force-measuring system.
The force-measuring system of the testing machine shall be calibrated in accordance with ISO 7500-1,
class 1, or better.
9.2 Extensometer.
For the determination of proof strength (plastic or total extension), the used extensometer shall be in
accordance with ISO 9513, class 1 or better, in the relevant range. For other properties (with higher
extension), an ISO 9513 class 2 extensometer in the relevant range may be used.
The extensometer gauge length shall be not less than 10 mm and shall correspond to the central portion of
the parallel length.
Any part of the extensometer projecting beyond the furnace shall be designed or protected from fluctuations
in air flow and room temperature, to have only a minimal effect on the readings. It is advisable to maintain
reasonable stability of the temperature and speed of the air surrounding the testing machine.

oSIST prEN ISO 6892-2:2025
ISO/DIS 6892-2:2025(en)
9.3 Heating device system
The heating device system consists from several parts
— heating device (e. g. furnace or oven)
— temperature controller
— temperature measuring system
The heating device system for the test piece shall be capable of heating the test piece to the specified
temperature, T.
9.3.1 Permitted deviations of temperature
The indicated temperatures, T , are the temperatures measured on the surface of the parallel length of the
i
test piece with corrections applied for any known systematic errors (verified bias).
The permitted deviations between the specified temperature, T, and the indicated temperatures, T , and the
i
maximum permissible temperature difference within the entire parallel length of the test piece are given in
Table 2. The laboratory shall verify that the permitted deviations are fulfilled at the end of the soaking time
to the start of the test. The measured temperature should be recorded during the complete test to identify
deviations.
For specified temperatures greater than 1 100 °C, the permitted deviations shall be defined by previous
agreement between the parties concerned.
Table 2 — Permitted deviations between T and T and maximum permissible temperature
i
differences along the test piece
Maximum permissible
Specified temperature, T Permitted deviation between T and T temperature differences along
i
°C °C the test piece
°C
T ≤ 600 ±3 3
600 < T ≤ 800 ±4 4
800 < T ≤ 1 000 ±5 5
1 000 < T ≤ 1 100 ±6 6
9.3.2 Measurement of temperature
When the parallel length is less than 50 mm, one temperature sensor shall measure the temperature at
each end of the parallel length directly. When the parallel length is equal to or greater than 50 mm, a third
temperature sensor shall measure near the centre of the parallel length.
This number may be reduced if the general arrangement of the furnace and the test piece is such that, from
experience, it is known that the variation in temperature of the test piece does not exceed the permitted
deviation specified in 9.3.1. However, at least one sensor shall be measuring the test piece temperature
directly.
Temperature sensor junctions shall make good thermal contact with the surface of the test piece and be
suitably screened from direct radiation from the furnace wall.
9.3.3 Temperature-measuring system
The temperature-measuring system shall have a resolution equal to or better than 1 °C and a measurement
unc
...