ISO 6305-2:2007

INTERNATIONAL ISO
STANDARD 6305-2
Second edition
2007-02-15
Railway components — Technical
delivery requirements —
Part 2:
Non-alloy carbon steel baseplates
Éléments constitutifs de la voie ferrée — Spécifications techniques de
livraison —
Partie 2: Selles en acier au carbone non allié

Reference number
©
ISO 2007
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2007
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2007 – All rights reserved

Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 General requirements. 1
3.1 Steelmaking process. 1
3.2 Manufacture of baseplates . 2
3.3 Freedom from defects . 2
3.4 Drawings and working gauges. 2
3.5 Finishing . 2
3.6 Flatness . 3
4 Technical requirements . 3
4.1 Tensile properties. 3
4.2 Properties of bend test. 3
4.3 Dimensional tolerances . 3
5 Acceptance testing. 4
5.1 General. 4
5.2 Number of tests. 4
5.3 Dimensions and finish. 5
5.4 Sampling for mechanical test. 5
5.5 Dimensional checks . 5
6 Test methods. 5
6.1 Tensile test . 5
6.2 Bend test. 6
6.3 Retest . 6
6.4 Interpretation of dimensional inspection . 6
6.5 Alternative to dimensional inspection by selection from batches — Quality control cards . 6
7 Marking . 7
8 Information to be supplied by the purchaser . 7
Annex A (normative) Checking of dimensions and tolerances. 8
Annex B (normative) Progressive sampling plan — Wald method. 10
Annex C (normative) Progressive sampling plan for inspection of resubmitted batches . 12

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6305-2 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 15, Railway rails and
their fasteners.
This second edition cancels and replaces the first edition (ISO 6305-2:1983), which has been editorially
revised.
ISO 6305 consists of the following parts, under the general title Railway components —Technical delivery
requirements:
⎯ Part 1: Rolled steel fishplates
⎯ Part 2: Non-alloy carbon steel baseplates
⎯ Part 3: Steel sleepers
⎯ Part 4: Untreated steel nuts and bolts and high-strength nuts and bolts for fishplates and fastenings
Part 1 of ISO 6305 was withdrawn by systematic review in 2002.

iv © ISO 2007 – All rights reserved

INTERNATIONAL STANDARD ISO 6305-2:2007(E)

Railway components — Technical delivery requirements —
Part 2:
Non-alloy carbon steel baseplates
1 Scope
This part of ISO 6305 specifies the quality requirements of the product and the conditions of acceptance
testing for rolled non-alloy carbon steel baseplates for use with flat-bottom railway rails.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical
testing
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 2859-2, Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by limiting
quality (LQ) for isolated lot inspection
ISO 2859-3, Sampling procedures for inspection by attributes — Part 3: Skip-lot sampling procedures
ISO 2859-4, Sampling procedures for inspection by attributes — Part 4: Procedures for assessment of
declared quality levels
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6892, Metallic materials — Tensile testing at ambient temperature
ISO 7438, Metallic materials — Bend test
3 General requirements
3.1 Steelmaking process
The steelmaking process shall be the responsibility of the manufacturer of the baseplates. If requested by the
purchaser at the time of enquiry or order, the manufacturer shall describe the steelmaking and casting
processes employed. The manufacture shall not alter these without the agreement of the purchaser.
3.2 Manufacture of baseplates
The baseplates shall be manufactured by cutting to length a rolled section and finishing in accordance with
drawings supplied by the purchaser.
3.3 Freedom from defects
The baseplates shall be free from defects adversely affecting their performance in service.
Slight defects outside the rail seating surface may be accepted by the receiving inspector if considered
negligible.
Any operation carried out either in the cold or hot state, with the object of concealing a defect adversely
affecting the performance of the baseplates in service is not permitted.
3.4 Drawings and working gauges
A copy of the final drawings shall be supplied to the manufacturer by the purchaser, together with the
notification of approval of the order.
If stated in the order, the manufacturer, before starting production, shall make up two sets of maximum and
minimum working gauges, incorporating the specified dimensional tolerances. If required by the purchaser,
the working gauges shall be stamped after approval by the purchaser’s representative.
Only these working gauges shall be valid for checking purposes.
One set of working gauges shall be made available to the receiving inspector for the period of acceptance
testing.
The working gauges shall be provided at the manufacturer’s expense. New working gauges need not be
provided for items ordered in quantities of less than 10 000 at any one time.
When the working gauges have been approved by a purchaser, or by an outside testing agency, these shall
be used for other purchasers, wherever possible.
3.5 Finishing
The rolling and baseplate finishing processes shall be the responsibility of the manufacturer. If requested by
the purchaser at the time of enquiry or order, the manufacturer shall describe the rolling and baseplate
finishing processes employed. The manufacturer shall not alter these without the agreement of the purchaser.
3.5.1 Baseplate length
The rolled bars used shall be cut to length by any suitable method which does not impair the section and the
quality of the metal. Each cut shall be perpendicular to the axis, clean and free of burrs. Any projections shall
be removed from the surfaces bearing on the rail. Hammering is not allowed.
Downward deformation of baseplate edges due to shearing is permissible up to a limit of 1,5 mm, over a width
of 20 mm for parts less than 33 mm thick and to 3 mm for parts more than 33 mm thick.
2 © ISO 2007 – All rights reserved
...