oSIST prEN 13674-1:2023

SLOVENSKI STANDARD
oSIST prEN 13674-1:2023
01-maj-2023
Nadomešča:
SIST EN 13674-1:2011+A1:2017
Železniške naprave - Tirnica - 1. del: Vignolove tirnice z maso 46 kg/m in več
Railway applications - Rail - Part 1: Vignole railway rails 46 kg/m and above
Bahnanwendungen - Schienen - Teil 1: Vignolschienen ab 46 kg/m
Applications ferroviaires - Rails - Partie 1 : Vignole de masse supérieure ou égale à 46
kg/m
Ta slovenski standard je istoveten z: prEN 13674-1
ICS:
45.080 Tračnice in železniški deli Rails and railway
components
93.100 Gradnja železnic Construction of railways
oSIST prEN 13674-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13674-1:2023

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oSIST prEN 13674-1:2023


DRAFT
EUROPEAN STANDARD
prEN 13674-1
NORME EUROPÉENNE

EUROPÄISCHE NORM

March 2023
ICS 93.100 Will supersede EN 13674-1:2011+A1:2017
English Version

Railway applications - Rail - Part 1: Vignole railway rails
46 kg/m and above
Applications ferroviaires - Rails - Partie 1 : Rails Bahnanwendungen - Schienen - Teil 1: Vignolschienen
Vignole de masse supérieure ou égale à 46 kg/m ab 46 kg/m
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13674-1:2023 E
worldwide for CEN national Members.

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oSIST prEN 13674-1:2023
prEN 13674-1:2023 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Information to be supplied by the purchaser . 9
5 Steel grades . 9
6 Profile drawings/properties/mass . 10
7 Manufacture . 11
7.1 Product integrity . 11
7.2 Blooms . 11
7.3 Rails . 11
7.4 Identification . 11
7.4.1 Branding . 11
7.4.2 Hot stamping . 12
7.4.3 Cold stamping . 13
7.4.4 Other identification . 13
8 Qualifying tests . 13
8.1 Procedure. 13
8.2 Fracture toughness (K ) . 13
Ic
8.2.1 Test pieces and test methods . 13
8.2.2 Qualifying criteria . 13
8.3 Fatigue crack growth rate . 14
8.3.1 Test method . 14
8.3.2 Test pieces . 14
8.3.3 Number of tests and test conditions . 14
8.3.4 Qualifying criteria . 14
8.4 Fatigue test . 15
8.4.1 Test method . 15
8.4.2 Test pieces . 15
8.4.3 Number of tests and test conditions . 15
8.4.4 Qualifying criteria . 15
8.5 Residual stress in rail foot . 15
8.5.1 Test method . 15
8.5.2 Test pieces . 15
8.5.3 Measurements . 15
8.5.4 Qualifying criteria . 15
8.6 Treated rails . 16
8.7 Segregation . 16
8.8 Other qualifying requirements . 16
9 Acceptance tests . 16
9.1 Laboratory tests . 16
9.1.1 General . 16
9.1.2 Sampling and preparation of samples and test pieces . 16
9.1.3 Chemical composition . 16
9.1.4 Microstructure . 21
9.1.5 Decarburisation . 21

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prEN 13674-1:2023 (E)
9.1.6 Oxide cleanness . 22
9.1.7 Sulphur prints . 22
9.1.8 Hardness . 22
9.1.9 Tensile tests . 23
9.1.10 Tensile strength and elongation . 23
9.1.11 Retest procedures . 24
9.2 Dimension tolerances . 24
9.2.1 Profile . 24
9.2.2 Straightness, surface flatness and twist . 25
9.2.3 Cutting and drilling . 29
9.3 Gauges . 29
9.4 Inspection for internal quality and surface quality . 29
9.4.1 Internal quality . 29
9.4.2 Surface quality . 32
9.4.3 Checking of automated testing equipment . 34
Annex A (normative) Rail profiles . 46
Annex B (normative) Standard test method for the determination of the plane strain fracture
toughness (K ) of rails . 71
Ic
B.1 Test methods . 71
B.2 Test pieces . 71
B.3 Number of tests . 71
B.4 Test conditions . 71
B.5 Analysis of test data . 72
B.6 Reporting of results . 72
Annex C (normative) Method for the determination of rail foot surface longitudinal residual
stresses . 78
C.1 Procedure . 78
C.2 Strain gauges and their location . 78
Annex D (normative) Limiting sulfur prints . 81
Annex E (normative) Profile and drilling gauges . 87
Annex F (normative) Microscopic examination of rail steels using standard diagrams to assess
the content of non-metallic inclusions . 100
F.1 General . 100
F.1.1 Degree of purity . 100
F.1.2 Standard diagram plate No. 1 . 100
F.2 Preparation of specimens . 100
F.3 Structure and use of standard diagram plate No. 1 . 100
F.3.1 Use of diagram plate No. 1 . 100
F.3.2 Rating a single inclusion . 101
F.3.3 Rating of very small inclusions . 101
F.4 Test procedure . 101
F.4.1 Magnification. 101
F.4.2 Selection of inclusions . 101
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prEN 13674-1:2023 (E)
F.4.2.1 General . 101
F.4.2.2 Rating of inclusions extending the diameter of observation . 101
F.4.2.3 Rating of inclusions of different types and shapes . 102
F.4.2.4 Rating of continuous and isolated inclusions . 102
F.4.2.5 Area to be examined . 102
F.5 Evaluation . 102
F.5.1 General . 102
F.5.1.1 Designation of inclusions . 102
F.5.1.2 Recording of inclusions . 102
F.5.2 Method of evaluation . 102
F.5.3 Calculation procedure for evaluation using method K . 102
Annex G (normative) Minimum requirements for the introduction of a new rail steel grade in
EN 13674-1 . 105
G.1 Mechanical and metallurgical properties . 105
G.2 Welding properties . 105
G.3 Track testing . 106
G.4 Documentation and request to CEN to introduce the new rail steel grade . 106
Annex H (informative) Significant technical changes between this European Standard and the
previous edition . 107
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive (EU) 2016/797 aimed to be covered. 110
Bibliography . 112

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oSIST prEN 13674-1:2023
prEN 13674-1:2023 (E)
European foreword
This document (prEN 13674-1:2023) has been prepared by Technical Committee CEN/TC 256“Railway
Applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13674-1:2011+A1:2017.
prEN 13674-1:2023 includes the following significant technical changes with respect to
EN 13674-1:2011+A1:2017:
— The number of rail profiles is modified: 24 instead of 23;
— Introduction of a new steel grade: R335V;
— The minimum depth of stamping is reduced from 0,5 mm to 0,4 mm;
— 60E2 can be used as well as the 60E1 for the qualifying tests;
— The predictive equation is removed from the qualifying tests to the acceptance tests;
— Suppression of 02 as an element to be controlled and measured;
— Brinell hardness test conditions have been modified;
— New value for foot toe thickness;
— The rail transition references have been removed;
— A new normative annex “Minimum requirements for the introduction of a new rail steel grade in
EN 13674-1” has been introduced.
This document has been prepared under a Standardization Request given to CEN by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s) /
Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part of
this document.
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Introduction
This Introduction provides an explanation of the concepts and reasoning considered for this standard.
Whenever possible this part of EN 13674 is performance based, recognizes the European Quality System
standard EN ISO 9001 and requires manufacturers to offer the latest proven technology to consistently satisfy
the demanding quality of the required product.
This part of EN 13674 has two major divisions:
1) qualifying tests;
2) acceptance tests.
The qualifying tests take into account performance requirements. They also include typical results from
relevant acceptance tests.
The acceptance tests control those characteristics of the rail steel and rail that are of relevance to the
production of high quality rails including heat treated rails and the demands of the railway.
To ensure the supply of high quality rails, some restrictions on production processes are considered.
The performance based standard applies to all procurements falling inside the requirements of the European
th
Procurement Directive (93/38/EEC of 14 June 1993), taking into account safety implications and at the same
time addressing modern production technology and the requirements of high-speed railways. As a result of
the Directive it was recognized that there would be few opportunities (and these would have to be for
transparent safety considerations) for derogation from the standard to operate between the user and the
manufacturer.
The standard includes a prerequisite for all manufacturers to prove conformity against a set of qualifying test
criteria. Qualifying tests include all "normal" acceptance test results plus new "type-casting" features such as
fracture toughness, fatigue cracks growth rate, fatigue test and residual stress. To provide users with the
necessary confidence, acceptance limits have been based on results from rail known to have performed well
in demanding track installations.
The standard includes a quality assurance and inspection clause as part of product integrity.
In order that quality management systems are consistent across all manufacturers and that users have the
best assurance for the consistency of required product quality on this safety critical component of the track,
this rail standard recommends that the manufacturers' quality assurance systems are at least equivalent to
the requirements of EN ISO 9001. The inclusion of this requirement also reduces the need to incorporate
detailed method and calibration descriptions on items such as normal chemical composition determination
and the need to define more extensive testing.

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oSIST prEN 13674-1:2023
prEN 13674-1:2023 (E)
1 Scope
This document specifies Vignole railway rails of 46 kg/m and greater linear mass, for conventional and high
speed railway track usage.
Pearlitic steel grades are specified covering a hardness range of 200 HBW to 440 HBW and include non heat
treated non alloy steels, non heat treated alloy steels, and heat treated non alloy steels and heat treated alloy
steels.
There are 24 rail profiles specified in this document.
Two classes of rail straightness are specified, differing in requirements for straightness, surface flatness and
crown profile. Two classes of profile tolerances are specified.
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 10163-1:2004, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections
- Part 1: General requirements
CEN/TR 10261:2018, Iron and steel - European standards for the determination of chemical composition
EN ISO 6506-1:2014, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1:2014)
EN ISO 6892-1:2019, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-
1:2019)
EN ISO 14284:2022, Steel and iron - Sampling and preparation of samples for the determination of chemical
composition (ISO 14284:2022)
EN ISO 80000-1:2022, Quantities and units - Part 1: General (ISO 80000-1:2022)
ISO 1099:2017, Metallic materials - Fatigue testing - Axial force-controlled method
ISO 4968:2022, Steel - Macrographic examination by sulphur print (Baumann method)
ISO 12108:2018, Metallic materials - Fatigue testing - Fatigue crack growth method
ASTM E399-22, Standard test method for linear-elastic plane-strain fracture toughness of metallic materials
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
3.1
bloom
refers to a semi product produced from a continuous casting machine with either a square, rectangular or
circular section
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3.2
heat
liquid steel melt tapped out of a converter or electric arc furnace which includes after continuous casting a
given number of blooms relating to the weight of the heat and the extension of the mixing zone
Note 1 to entry: In the case of sequence casting the blooms belonging to the mixing zone should be clearly defined.
3.3
sequence
any number of heats, of the same steel grade, which undergo continuous casting in tundishes
Note 1 to entry: Tundishes may be used in parallel.
3.4
heat treated rail
rail that has undergone accelerated cooling from austenitizing temperature during the metallurgical
transformation period
Note 1 to entry: The heat treatment can be carried out directly after rolling or following a separate reheating process
to achieve the austenitization temperature.
3.5
rolling process
process between the blooms leaving the heating furnace and exiting the finishing pass
3.6
isothermal treatment process
process whereby blooms are held for a period of time at an elevated temperature for reducing the hydrogen
content
Note 1 to entry: For maximum efficiency this is as near to (but below) the austenite to pearlite transformation
temperature as is practically possible.
Note 2 to entry: This process is sometimes referred to as sub critical diffusion annealing.
3.7
qualifying test
special test and criteria which are relevant to some aspects of the service performance of rails
Note 1 to entry: Acceptance tests also form part of the qualifying tests.
3.8
acceptance test
test carried out as part of the process and product control system, normally on a heat, sequence or tonnage
basis
3.9
rail running surface
curved surface of the rail head. Area between both gauge corners (transition points of the head inclination and
the first head radius)
3.10
units of measurement
for the purpose of determining conformance with the specification, numeric values are rounded according to
the rules stipulated in EN ISO 80000-1:2022

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