SIST EN 10373:2021

SLOVENSKI STANDARD
SIST EN 10373:2021
01-september-2021
Ugotavljanje fizikalnih in mehanskih lastnosti jekel z uporabo modelov
Determination of the physical and mechanical properties of steels using models
Berechnungsmodell für die Datenbereitstellung von physikalischen und mechanischen
Eigenschaften für Stähle
Détermination des propriétés physiques et mécaniques des aciers à l'aide de modèles
Ta slovenski standard je istoveten z: EN 10373:2021
ICS:
77.080.20 Jekla Steels
SIST EN 10373:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10373:2021

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SIST EN 10373:2021


EN 10373
EUROPEAN STANDARD

NORME EUROPÉENNE

June 2021
EUROPÄISCHE NORM
ICS 77.080.20; 77.140.01
English Version

Determination of the physical and mechanical properties
of steels using models
Détermination des propriétés physiques et mécaniques Ermittlung physikalischer und mechanischer
des aciers à l'aide de modèles Eigenschaften von Stählen mittels Anwendung von
Modellen
This European Standard was approved by CEN on 23 May 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 10373:2021 E
worldwide for CEN national Members.

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SIST EN 10373:2021
EN 10373:2021 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements on the application of models . 6
4.1 General . 6
4.2 Application range . 7
4.3 Requirements on input data . 8
4.4 Requirements on output data . 8
5 Requirements on model verification and application . 8
5.1 General . 8
5.2 Model verification . 10
5.3 Modelling process validation . 10
5.4 Details of the assessment procedure for model verification . 10
6 Requirements on monitoring of models . 11
6.1 General . 11
6.2 Monitoring of models . 11
6.3 Deviation of output data from conventional testing . 12
6.4 Statistical methods for control and monitoring of models . 13
7 Specific requirements on quality management . 13
7.1 General . 13
7.2 Responsibilities and qualification of employees . 13
7.3 Measuring and testing equipment . 13
7.4 Handling of data . 14
7.5 Documentation . 14
7.6 Case of dispute. 14
Annex A (informative) Example of a model for calculation of tensile strength in rolling
direction . 15
Annex B (informative) Illustration of model verification . 16
Annex C (informative) Example of a template for predicted properties . 18
Bibliography . 19

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SIST EN 10373:2021
EN 10373:2021 (E)
European foreword
This document (EN 10373:2021) has been prepared by Technical Committee CEN/TC 459 SC 12 “General
issues”, the secretariat of which is held by BSI.
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 December 2021, and conflicting national standards shall
be withdrawn at the latest by December 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.
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SIST EN 10373:2021
EN 10373:2021 (E)
Introduction
Since the physical and mechanical properties of steels are ultimately based upon the metallurgical
transformations during the production process, there have been numerous efforts of the manufacturers
in the past, to design models for providing property data for the whole product, in order to improve the
control of the increasingly complex processes during the manufacturing of steel products.
In doing so, the use of models not only helps to reduce the amount of testing in the scope of factory
production control, but it gives a more representative overview of the material properties of steels, since
models can use all available data, determined during the production process, whereas conventional
material testing represents in principle a spot check of the material properties at the time of sampling
and at the place where the samples were taken.
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SIST EN 10373:2021
EN 10373:2021 (E)
1 Scope
This document specifies the method for the verification of models for the determination of the property
data of steels and the validation of the modelling process. It is applicable where modelling of mechanical
or physical properties is used to substitute conventional testing for specific inspection. Models can be
based on statistical data, thermo-physical data or indirect measurement (e.g. measurement of magnetic
or ultrasonic data), or a combination of these methods.
This document applies only for providing the properties of rolled and/or heat-treated products such as
plates, sheets, strip, sections and bars.
This document is used to demonstrate the ability of the model to supply property data which is equivalent
to data, measured by conventional testing.
Any self-learning system is excluded from the scope.
NOTE A self-learning, in the spirit of an auto-adaptive model, is a model which changes its internal parameters
by itself.
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 10021, General technical delivery conditions for steel products
EN 10204, Metallic products - Types of inspection documents
NOTE At the time of the first release of this standard, no publications concerning statistical analyses of
manufacturing processes and/or statistical methods have been identified, which could have been cited as normative
references in this document. The bibliography contains references to technical literature, which can be taken into
account.
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:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
3.1
model
documented system for the generation of output data using input data
Note 1 to entry: A unique set of input values to the model will always result in the same calculated output
value(s).
Note 2 to entry: The model calculates physical and/or mechanical property data from input data, the results of
which can also be determined by physical and/or mechanical testing.
Note 3 to entry: An example of a linear model for calculation of tensile strength is given in Annex A.
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SIST EN 10373:2021
EN 10373:2021 (E)
3.2
input data
measurement data, or data which is related to those parts of a manufacturing process, which are relevant
to the product properties to be calculated
3.3
output data
physical and/or mechanical property data of a steel product according to the scope, which is generated
by a model according to 3.1
3.4
manufacturing process
entirety of all process steps (including all time periods between them), that leads from a starting product
(e.g. raw material, or a semi-finished product) to an end product
3.5
model verification
documented system of initial comparative testing and analysis procedures, carried out by the
manufacturer, proving the ability of a model to replace conventional testing of product properties by
output data
Note 1 to entry: An example for a model verification with sampling size n = 6 is given in Annex B.
3.6
modelling process validation
validation of the process by which the applicability and accuracy of models for prediction of specified
properties is confirmed by an independent body
3.7
model monitoring
documented system of regular checks, using data analysis procedures of input and output data, part of
the modelling process, as well as regular comparative testing, to ensure the accuracy and reliability of
modelled product properties
3.8
application range
range of steel products, chemical composition, manufacturing conditions and all additional conditions
affecting the model accuracy for which the model has been verified
4 Requirements on the application of models
4.1 General
Models can be based on direct measurement data (thermo-physical data), indirect measurement data
(e.g. measurement of magnetic or ultrasonic data), statistical data generated from indirect and/or direct
measurement data, or a combination of these methods.
The output data, determined by models, shall be equivalent to the results of conventional testing, within
the limits of allowable deviations, distinctively specified for each physical and mechanical property. To
define the allowable deviations is under the responsibility of the manufacturer.
Models shall be validated before they can be used for the release of products.

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SIST EN 10373:2021
EN 10373:2021 (E)
4.2 Application range
4.2.1 General
Models for determination of property data are intended to be used for quality control in the production
process of steel products with specified physical properties, which are documented in standards or other
specifications and which can be alternatively determined by physical testing.
The application range of the model shall be described and documented in reference to the steel products,
in terms of chemical composition and manufacturing conditions and all additional conditions, that have
an influence on the model accuracy, and for which the model has been verified.
4.2.2 Conditions for the application of models
The following restrictions shall apply to models:
a) Manufacturing processes shall run under control of a quality management system and shall produce
input data, representative for the products and in a sufficient amount to apply appropriate
documented statistical methods in the scope of the control and monitoring of models according to
Clause 6 (e.g. large scale production).
NOTE Quality management systems in accordance with EN ISO 9001, or comparable systems, meet this
requirement.
b) The application range of a model shall be explicitly defined and documented with respect to the
considered products.
c) The model outputs shall only be used for product release if the model is used within the application
range.
d) Determination of physical and/or mechanical properties by a model shall be in accordance to the
requirements of a written specification (e.g. national, or international standards, or other
appropriate technical documentation).
e) For certain inspection types according to EN 10204 only input data, which can be related explicitly
to the test unit according to the applicable written specification or product standard shall be used.
f) The modelling process shall have been validated by an independent body before any initial
application of any model according to Clause 5 of this document.
4.2.3 Conditions for extension of the application range of models
An extension can only be considered if the model itself, including any internal parameter, does not
change.
Any extension of the application range which requires modification of the model or its internal
parameters shall be treated as a new model.
In case of the extension of the application range of a model for the determination of physical and
mechanical properties of steels, it shall be ensured, that:
a) the extension of the application range of a model is explicitly defined and documented in terms given
in 4.2.2;
b) the application of the extended model is in accordance with the conditions of 4.2.2;
c) the validation according to Clause 5 of this document has been repeated for the extended application
range of the model, prior to its regular use (e.g. for the manufacturers factory production control).
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SIST EN 10373:2021
EN 10373:2021 (E)
4.3 Requirements on input data
4.3.1 General
For all measured input data, indispensable for the application of a model, the measurement methods shall
be in accordance with accepted national or international standards or written internal documentation.
NOTE 1 Input data can also be data from another model, which describes an earlier process step.
NOTE 2 An example is given in Annex C.
4.3.2 Measurement equipment
All measurement equipment shall be uniquely identified and documented with respect to their positions
in the manufacturing process, or parts thereof.
The unit of measurement, the accuracy and the range of valid results for each measured input shall be
specified by the manufacturer.
4.3.3 Measurement methods
For the measurement of input data, appropriate direct or indirect measurement methods shall be applied.
The fundamentals of metrology, as well as the requirements for the analysis of measured parameters and
of measurement uncertainties, shall be given by appropriate national or international standards. When
non-standardized metrology method
...