oSIST prEN 18128-1:2025

SLOVENSKI STANDARD
01-januar-2025
Železniške naprave - Novi materiali - 1.del: Smernica in metodologija potrjevanja
Railway applications - New materials - Part 1: Guideline and validation methodology
Bahnanwendungen - Neue Werkstoffe - Teil 1: Leitfaden und Validierungsmethodik
Applications ferroviaires - Nouveaux matériaux - Partie 1 : Lignes directrices et
méthodologie de validation
Ta slovenski standard je istoveten z: prEN 18128-1
ICS:
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2024
ICS 45.040; 45.060.01
English Version
Railway applications - New materials - Part 1: Guideline
and validation methodology
Applications ferroviaires - Nouveaux matériaux - Partie Bahnanwendungen - Neue Werkstoffe - Teil 1:
1 : Lignes directrices et méthodologie de validation Leitfaden und Validierungsmethodik
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 18128-1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Validation methodology . 7
4.1 General. 7
4.2 Concept . 8
4.2.1 General. 8
4.2.2 Specifications . 8
4.3 Requirements and prioritization . 8
4.4 Validation of requirements R . 8
X
4.5 Test and correlation . 9
4.5.1 General. 9
4.5.2 Is subset or full-scale testing required? . 9
4.5.3 Subset or full-scale testing . 9
4.5.4 Is the subset or full-scale test validated? . 9
4.5.5 Is fitting test results with calculation required? . 9
4.6 Part validated . 9
5 Safety requirements validation . 10
5.1 Static . 10
5.1.1 General. 10
5.1.2 Preliminary design . 11
5.1.3 Advanced design . 12
5.1.4 Static requirement validated . 13
5.2 Fatigue . 15
5.2.1 General. 15
5.2.2 Preliminary design . 15
5.2.3 Advanced fatigue design . 17
5.2.4 Fatigue requirement validated . 19
5.3 Crash . 21
5.3.1 General. 21
5.3.2 Preliminary design . 21
5.3.3 Advanced design . 23
5.3.4 Crash requirement validated . 24
5.4 Impact . 26
5.4.1 General. 26
5.4.2 Preliminary design . 26
5.4.3 Advanced design . 27
5.5 Assembly methods . 29
5.5.1 General. 29
5.5.2 Design process . 30
5.6 Modal analysis . 30
5.7 Fire and smoke toxicity . 31
5.8 Electromagnetic compatibility and conductivity . 31
5.9 External environment . 32
6 Manufacturing. 33
7 Maintenance . 33
Bibliography . 34

European foreword
This document (prEN 18128-1:2024) 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.

Introduction
The purpose of this document is to specify a process guideline and a methodology to support the
introduction of new materials and processes to meet the minimum requirements in the railway sector in
a robust, efficient and safe manner whilst supporting the confidence level and acceptability during the
approval process.
This document answers to the following points:
— most existing standards for the design of railway vehicles are dedicated to standardized metallic
materials and cannot be fully applied to new materials and/or processes. In fact, some of them are
non-isotropic materials, multi-layer materials, strongly dependent on external environment, with
different behaviour regarding fatigue, impact etc.;
— new materials and/or processes offer improved performance characteristics, e.g. reduced weight,
whole life costs/reduced LCC, environmental benefits, energy efficiency, etc.
— new materials offer the opportunity for the product to be more multifunctional e.g. a structural
material incorporating insulation (acoustic, thermal, electrical, etc.);
— many existing standards are written around existing materials and may not be appropriate for or
limit the use of new materials;
— the acceptance and approval procedures can be prolonged and costly due to uncertainties / lack of
experience with new materials.
Further parts of this standard dedicated to each specific material and processes (composite materials,
additive manufacturing, new alloys etc.) will be written based on this guideline and methodology. These
new parts will include methodology to define specific criteria, safety factors, tests, controls etc. associated
with each material and processes.

1 Scope
This document defines a process guideline and a methodology to support the introduction of new
materials and processes to meet the minimum requirements in the railway sector for all rolling stock
defined in EN 17343 and onboard equipment.
This document is applicable to new materials and processes for all rolling stock and onboard equipment.
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 50125-1, Railway applications — Environmental conditions for equipment — Part 1: rolling stock and
on-board equipment
EN 60721-3-5, Classification of environmental conditions — Part 3: Classification of groups of
environmental parameters and their severities — Section 5: Ground vehicle installations (IEC 60721-3-5)
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:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: availab
...