BS ISO 9477-2015 High strength cast steels for general engineering and structural purposes《通用工程和结构用高强度铸钢》.pdf

1、BSI Standards Publication BS ISO 9477:2015 High strength cast steels for general engineering and structural purposesBS ISO 9477:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9477:2015. The UK participation in its preparation was entrusted to Technical

2、Committee ISE/111, Steel Castings and Forgings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British S

3、tandards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 76496 7 ICS 77.140.80 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 Septe

4、mber 2015. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dBS ISO 9477:2015 ISO 2015 High strength cast steels for general engineering and structural purposes Aciers mouls haute rsistance pour construction mcanique et construction mtallique dusage gnral INTERNATIONAL STAND

5、ARD ISO 9477 Second edition 2015-09-15 Reference number ISO 9477:2015(E)BS ISO 9477:2015ISO 9477:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or ut

6、ilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyr

7、ight office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 9477:2015ISO 9477:2015(E)Foreword iv 1 Scope . 1 2 Normative references 1 3 General conditions for delivery 1 4 Heat treatment . 1 5 Chemical requ

8、irements . 1 6 Mechanical properties 1 7 Supplementary requirements 2 ISO 2015 All rights reserved iii Contents PageBS ISO 9477:2015ISO 9477:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work

9、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-government

10、al, 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. The procedures used to develop this document and those intended for its further maintenance are described in the

11、ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possib

12、ility 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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of

13、patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as

14、information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information. The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 11, Steel castings. This second edition cancels and replaces t

15、he first edition (ISO 9477:1992), which has been technically revised with the following changes: Clause 7 has been revised.iv ISO 2015 All rights reservedBS ISO 9477:2015INTERNATIONAL ST ANDARD ISO 9477:2015(E) High strength cast steels for general engineering and structural purposes 1 Scope This In

16、ternational Standard specifies requirements for four grades of heat treated cast carbon and alloy steels for general engineering and structural purposes. In cases where castings are produced by welding component parts together, this International Standard does not cover the welding process or the pr

17、operties of the weldment. The four steel grades are intended for service at ambient temperature. However, properties at other temperatures can be agreed on through the use of supplementary requirements in ISO 4990. 2 Normative references The following documents, in whole or in part, are normatively

18、referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4990, Steel castings General technical delivery requirements 3 Ge

19、neral conditions for delivery Materials furnished in accordance with this International Standard shall conform to the applicable requirements of ISO 4990, including the supplementary requirements that are indicated in the inquiry and purchase order. 4 Heat treatment The type of heat treatment is lef

20、t to the discretion of the manufacturer, unless specifically agreed upon at the time of ordering. 5 Chemical requirements 5.1 The maximum contents of silicon, sulphur , and phosphorous shall be 0,60 %, 0,025 %, and 0,030 %, respectively. 5.2 The chemical composition may be agreed upon between the ma

21、nufacturer and purchaser through the use of supplementary requirement 7.2. 5.3 The maximum carbon equivalent allowed in the supplied chemical composition may be agreed upon between the manufacturer and purchaser through the use of supplementary requirement 7.3. 6 Mechanical properties 6.1 Steel used

22、 for castings shall conform to the mechanical properties given in Table 1. ISO 2015 All rights reserved 1BS ISO 9477:2015ISO 9477:2015(E) 6.2 Either the reduction of area or the impact strength shall be determined and shall conform to the requirements specified for the grade in Table 1. The choice o

23、f test will be at the discretion of the manufacturer, unless specified by the purchaser at the time of ordering. 6.3 In the case of castings supplied in the quench and tempered condition and where the thickness is 75 mm, ISO 4990:2015, B.6.1.3 shall be required. 7 Supplementary requirements 7.1 A li

24、st of standardized supplementary requirements for use at the option of the purchaser is given in ISO 4990. 7.2 The chemical composition shall be selected by an agreement between the manufacturer and the purchaser. 7.3 The carbon equivalent, CE, of the supplied alloy is defined as follows: The carbon

25、 equivalent shall be limited to a maximum value by an agreement between the manufacturer and the purchaser. Table 1 Mechanical properties at ambient temperatures on test blocks (28 mm thick) Steel grade R eH min. MPa R mMPa A min. % By choice, according to order Z a min. % KV a min. J 410620 540720

26、620820 8401030 410 540 620 840 620 to 770 720 to 870 820 to 970 1 030 to 1 180 16 14 11 7 40 35 30 22 20 20 18 15 R eHif measurable, otherwise the 0,2 % proof stress R mtensile strength A percentage elongation Z reduction of area KV impact energy 1 MPa = 1 N/mm 2 NOTE 1 The required mechanical prope

27、rties are obtained from 28 mm thick standard test blocks, cast either separately from, or attached to, the casting that they represent. The test values so exhibited therefore represent the quality of steel from which the castings have been poured. They do not necessarily represent the properties of

28、the casting themselves, which might be affected by solidification conditions and the rate of cooling during heat treatment, which, in turn, are influenced by casting thickness, size, and shape, if the thickness of the casting is considerably greater than 75 mm, the application of the supplementary r

29、equirement in ISO 4990:2015, B.6.1.3 is mandatory. NOTE 2 Ambient temperature is taken as 23 C 5 C. aSee Clause 6.2 ISO 2015 All rights reservedBS ISO 9477:2015BS ISO 9477:2015ISO 9477:2015(E) ISO 2015 All rights reserved IC S 77.140.80 Price based on 2 pagesThis page deliberately left blankBSI is t

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