SIST EN 10371:2021
(Main)Metallic materials - Small punch test method
Metallic materials - Small punch test method
This document specifies the small punch method of testing metallic materials and the estimation of tensile, creep and fracture mechanical material properties from cryogenic up to high temperatures.
Small punch test für metallische Werkstoffe
Dieses Dokument legt das Small-Punch-Prüfverfahren für metallische Werkstoffe und die Abschätzung der mechanischen Werkstoffeigenschaften in Bezug auf Zug, Kriechen und Bruch bei sehr tiefen bis hohen Temperaturen fest.
Matériaux métalliques - Méthode d’essai de micro-emboutissage
Le présent document spécifie la méthode d’essai de micro-emboutissage des matériaux métalliques et l’estimation des propriétés de traction, de fluage et de mécanique de la rupture depuis les températures cryogéniques jusqu’aux hautes températures.
Kovinski materiali - Preskusna metoda z uporabo majhnega bata
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2021
Kovinski materiali - Preskusna metoda z uporabo majhnega bata
Metallic materials - Small punch test method
Small punch test für metallische Werkstoffe
Matériaux métalliques - Méthode d’essai de micro-emboutissage
Ta slovenski standard je istoveten z: EN 10371:2021
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 10371
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 77.040.10
English Version
Metallic materials - Small punch test method
Matériaux métalliques - Méthode d'essai de micro- Metallische Werkstoffe - Small-Punch-Test
emboutissage
This European Standard was approved by CEN on 11 January 2021.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10371:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and designations . 9
5 Test piece . 12
5.1 General . 12
5.2 Material sampling . 14
6 Apparatus . 14
6.1 Testing machine . 14
6.2 Test environment . 15
6.3 Applying and measuring force . 15
6.4 Punch and specimen holder . 15
6.5 Measuring displacement and/or deflection . 17
6.6 Measuring test temperature . 17
7 Small punch test. 18
7.1 Principle . 18
7.2 Test procedure . 18
7.3 Characteristic parameters on the force-deflection curve F(u) . 19
7.4 Test report . 23
8 Small punch creep test . 23
8.1 Principle . 23
8.2 Specificities of apparatus for small punch creep testing . 24
8.3 Test procedure . 24
8.4 Characteristics of the deflection-time curve . 25
8.5 Test report . 26
Annex A (informative) Determining the compliance of a small punch test rig for
displacement measurements . 27
Annex B (informative) Procedure for temperature control and measurement during small
punch testing . 30
from small punch testing . 35
Annex C (informative) Estimation of ultimate tensile strength Rm
Annex D (informative) Estimation of proof strength R from small punch testing . 39
p0,2
Annex E (informative) Estimation of DBTT from small punch testing . 40
Annex F (informative) Estimation of fracture toughness from small punch testing . 43
Annex G (informative) Estimation of creep properties from small punch creep testing . 46
Annex H (informative) Post-test examination of the test piece . 50
Annex I (informative) Machine readable formats . 56
Bibliography . 57
European foreword
This document (EN 10371:2021) has been prepared by Technical Committee CEN/TC 459/SC 1 “Test
methods for steel (other than chemical analysis)”, the secretariat of which is held by AFNOR.
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 2021, and conflicting national standards shall
be withdrawn at the latest by October 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
This document describes small punch testing of metallic materials.
While it is recognized that the small punch test technique is not equivalent to uniaxial testing and cannot
currently replace uniaxial and fracture mechanics tests with larger specimens, it allows estimation of the
values normally obtained using classical standard size uniaxial or fracture mechanics specimens.
The small punch technique is especially useful when only small amounts of material are available as in
the case of experimental material batches, or for assessing aging of components where the extraction of
classical specimen types would require expensive repairs. Other areas of interest for small punch testing
are the characterization of irradiated materials, where small specimens minimize laboratory staff
exposure to radiation or the investigation of different zones in welds.
1 Scope
This document specifies the small punch method of testing metallic materials and the estimation of
tensile, creep and fracture mechanical material properties from cryogenic up to high temperatures.
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.
EN 60584-1, Thermocouples - Part 1: EMF specifications and tolerances (IEC 60584 1)
EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1)
EN ISO 204, Metallic materials - Uniaxial creep testing in tension - Method of test (ISO 204)
EN ISO 286-2, Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes -
Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts (ISO 286-2)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 6892-2, Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature
(ISO 6892-2)
EN 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 7500-1)
EN ISO 7500-2, Metallic materials - Verification of static uniaxial testing machines - Part 2: Tension creep
testing machines - Verification of the applied force (ISO 7500-2)
EN ISO 9513, Metallic materials - Calibration of extensometer systems used in uniaxial testing (ISO 9513)
ISO 2768-1, General tolerances - Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
punch
single solid rod with a hemispherical tip or a cylindrical rod combined with a ball is used to punch through
the centre of the disc shaped test piece
Note 1 to entry: The hemispherical portion of the punch or the ball shall have a sufficient hardness to ensure
rigidity so as not to be deformed during the test. Ultra-hard ball-bearing balls can be used for that application. The
compliance of the punch will affect the displacement measurement (see 3.5).
3.2
test piece
circular, disc shaped piece of the material under investigation
Note 1 to entry: The testing of other geometries is admissible according to this document if the active part of the
specimen has a flat cylindrical shape and the clamped area is equal to or larger than that of the specimens included
in this document.
3.3
small punch (SP) test
when the punch tip/ball is pushed through the specimen with constant displacement rate of the cross
head, ẇ and the force, F is measured as a function of deflection, u / displacement, v
Note 1 to entry: The test can be used for estimating tensile and fracture material properties. If displacement is
used, consideration of machine compliance is necessary (Annex A).
3.4
small punch creep (SPC) test
when the punch tip/ball is pushed through the specimen under constant force, F and the deflection, u /
displacement, v is measured as a function of time
Note 1 to entry: The test can be used for estimating uniaxial creep properties.
3.5
displacement, v of the punch tip
distance by which the punch tip has moved after initial contact with the specimen surface
3.6
crosshead displacement
w
distance by which the cross head has moved after initial contact of the punch tip with the specimen
surface
3.7
deflection
u
distance by which the point at the centre of the specimen on the surface opposite to the point of contact
between the punch and the specimen has moved after initial contac
...
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