oSIST prEN 15718:2007

Railway applications - Monoblock wheel products - Cast wheels

This European Standard specifies the characteristics of cast railway wheels for use on European networks.Two steel grades; C ER7 and C ER8, are defined in this standard. For tread braked wheels; only C ER7 shall be used.This standard is applicable to cast wheels which have a chilled rim1). The standard is only applicable to cast wheels that have satisfied technical approval procedure prEN13979-2:2005.This standard applies only to wheels used in freight wagon applications for speeds up to and including 120 km/h.
Note 1:"Rim Chilled" describes heat treatment of the rim, the aim of which is to harden the rim and to create circumferential compressive residual stresses in the rim.

Bahnanwendungen - Vollräder - Gussräder

Diese europäische Norm spezifiziert die Merkmale von gegossenen Eisenbahnrädern, die auf europäischen Streckennetzen verwendet werden sollen.
In dieser europäischen Norm werden zwei Stahlgüten, C  ER7 und C  ER8 definiert. Für über die Laufflächen gebremste Räder wird nur C  ER7 verwendet.
Diese europäische Norm ist auf Gussräder mit gehärteten Radreifen )anwendbar. Diese europäische Norm ist nur auf Gussräder anwendbar, die das technische Genehmigungsverfahren nach prEN 13979-2 erfüllt haben.
Diese europäische Norm gilt nur für Räder, die in Güterwagenanwendungen für Geschwindigkeiten bis zu einschließlich 120 km/h verwendet werden.

Applications ferroviaires - Roues monobloc - Roues en acier moulé

Železniške naprave - Monoblok kolesa - Lita kolesa

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Jan-2008
• ICS: 45.040 - Materials and components for railway engineering
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 27-Jan-2014
• Due Date: 01-Feb-2014
• Completion Date: 27-Jan-2014
• Directive: 2001/16/EC - Directive 2001/16/EC of the European Parliament and of the Council of 19 March 2001 on the interoperability of the trans-European conventional rail system
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Mandate: M/334 - Mandate for programming and standardisation addressed to CEN, CENELEC and ETSI in the field of the Interoperability of the trans-european conventional rail system
• Ref Project: prEN 15718 - Railway applications - Monoblock wheel products - Cast wheels

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2007
Železniške naprave - Monoblok kolesa - Lita kolesa
Railway applications - Monoblock wheel products - Cast wheels
Ta slovenski standard je istoveten z: prEN 15718
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.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 45.040
English Version
Railway applications - Monoblock wheel products - Cast wheels
Applications ferroviaires - Roues monobloc - Roues en
acier moulé
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland 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
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15718:2007: E
worldwide for CEN national Members.

Contents Page
Foreword. 6
Introduction . 7
1 Scope. 8
2 Normative references . 8
3 Product definition . 9
3.1 Chemical composition. 9
3.1.1 Values to be achieved. 9
3.1.2 Location of the sample. 9
3.1.3 Chemical analysis. 10
3.2 Mechanical characteristics . 10
3.2.1 Tensile test characteristics. 10
3.2.2 Hardness characteristics in the rim . 11
3.2.3 Impact test characteristics. 12
3.2.4 Fatigue characteristics. 13
3.2.5 Toughness characteristic of the rim. 14
3.3 Heat treatment homogeneity . 15
3.3.1 Location of measurement . 15
3.3.2 Values to be achieved. 15
3.3.3 Test method. 15
3.4 Material cleanliness . 15
3.4.1 Micrographic cleanliness . 15
3.4.2 Internal integrity. 15
3.5 Residual stresses. 18
3.5.1 General. 18
3.5.2 Values to be achieved. 18
3.5.3 Test piece. 19
3.5.4 Measurement methods. 19
3.6 Surface characteristics. 19
3.6.1 Surface appearance. 19
3.6.2 Surface integrity. 20
3.7 Geometric tolerances . 20
3.8 Static imbalance. 22
3.9 Shot peening . 23
3.9.1 Requirements . 23
3.9.2 Quality assurance provisions. 23
3.10 Protection against corrosion . 24
3.11 Manufacture’s Markings. 24
Annex A (normative) Hydrogen control at the point of steel melt for monobloc wheels. 25
A.1 Sampling . 25
A.2 Analysis methods . 25
A.3 Operating precautions. 25
Annex B (informative) Example of a test method for the determination of fatigue
characteristics. 26
B.1 Test piece. 26
B.2 Test rig . 26
B.3 Test monitoring. 26
B.4 Analysis of results . 26
Annex C (informative) Strain gauge method for determining the variation of
circumferential residual stresses located deep under the tread . 27
C.1 Principle . 27
C.2 Procedure . 27
C.2.1 Fitting of a rim cross section with strain gauges prior to wheel cutting . 27
C.2.2 Execution of cutting. 27
C.2.3 Operations to be executed during cutting.28
C.3 Expression of results. 28
C.3.1 Calculation of the variation of the circumferential residual stress located deep
under the tread . 28
C.3.2 Calculation of the variation of the circumferential stress created by cutting
operation 1. 28
C.3.3 Calculation of the variation of the circumferential stress created by cutting
operation 2. 29
C.3.4 Calculation of the variation of the circumferential stress created by cutting
operation 3. 29
C.3.5 Final diagram representing the variation of the circumferential stress located
deep under the tread. 29
Annex D (informative) Ultrasonic method for determining the residual stress in the rim
(non destructive method). 33
D.1 Description of Measurement Method. 33
D.2 Acceptance Criteria . 34
Annex E (informative) Product qualification. 35
E.1 General. 35
E.2 Requirements . 35
E.2.1 Requirements for the producer . 35
E.2.2 Requirements for the product . 36
E.3 Qualification procedure. 36
E.3.1 General. 36
E.3.2 Documentation required. 36
E.3.3 Evaluation of manufacturing equipment and of the production processes. 37
E.3.4 Laboratory tests . 37
E.3.5 Testing of wheels. 38
E.4 Qualification certificate . 38
E.4.1 Condition of the validity . 38
E.4.2 Modification and extension. 38
E.4.3 Transference. 39
E.4.4 Lapsed certificate. 39
E.4.5 Cancellation.
...