1、BSI Standards PublicationBS ISO 4990:2015Steel castings Generaltechnical delivery requirementsBS ISO 4990:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 4990:2015. The UK participation in its preparation was entrusted to TechnicalCommittee ISE/111, Steel
2、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 Standards Institution 2015.P
3、ublished by BSI Standards Limited 2015ISBN 978 0 580 76493 6 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 September 2015.Amendments/corrigend
4、a issued since publicationDate T e x t a f f e c t e dBS ISO 4990:2015 ISO 2015Steel castings General technical delivery requirementsPices moules en acier Conditions techniques gnrales de fournitureINTERNATIONAL STANDARDISO4990Third edition2015-09-15Reference numberISO 4990:2015(E)BS ISO 4990:2015IS
5、O 4990:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopyi
6、ng, 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 copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 1
7、1Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 4990:2015ISO 4990:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 24 Information to be supplied by the purchaser. 25 Conditions of manufacture 35.1 Foundry practice . 35.2 Cleaning and dressing . 35.3 Production we
8、lding . 36 Inspection and testing 36.1 Non-specific inspection . 36.2 Specific inspection . 36.2.1 Documents 36.2.2 Sampling, preparation of test pieces, and mechanical and chemical test methods and requirements 46.2.3 Inspection and testing of castings and requirements for surface appearance and di
9、mensions 77 Marking 78 Complaints 8Annex A (normative) General conditions for specific inspections and tests 9Annex B (normative) Supplementary requirements 10Bibliography .15 ISO 2015 All rights reserved iiiContents PageBS ISO 4990:2015ISO 4990:2015(E)ForewordISO (the International Organization for
10、 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
11、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.The procedu
12、res used to develop this document and those intended for its further maintenance are described in the 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
13、rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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. Details of any patent rights ide
14、ntified during the development of the document will be in the Introduction and/or on the ISO list of 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
15、 on the meaning of ISO specific terms and expressions related to conformity assessment, as well as 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 i
16、s ISO/TC 17, Steel, Subcommittee SC 11, Steel castings. This third edition cancels and replaces the second edition (ISO 4990:2003), which has been technically revised with the following changes: Clause 2: new and replacement normative references have been added; 3.1 has been revised; 4.2 has been de
17、veloped; 6.2.2.1 has been moved to 6.2.3, and the subclauses have been renumbered; in 6.2.2.4, editorial changes have been carried out to eliminate confusion over paragraph identification and the last paragraph and the reference to ISO/TR 9769 have been deleted; 6.2.3.2.2 has been deleted and the co
18、ntents moved to 6.2.3.2; 6.2.3.3 has been revised; Clause 7 has been revised; A.1.3 has been revised; A.3 has been deleted; B.2.2, B.4.2, and B.4.4 have been revised; Table 1 has been revised; Table 2 has been deleted; editorially revised.iv ISO 2015 All rights reservedBS ISO 4990:2015INTERNATIONAL
19、STANDARD ISO 4990:2015(E)Steel castings General technical delivery requirements1 ScopeThis International Standard specifies the general technical delivery requirements for the supply of steel, nickel, and cobalt alloy castings, including the requirements for the selection and preparation of samples
20、and test pieces.When a material or product standard differ from this delivery specification, the material or product standard shall apply. In the case of investment castings, ISO 16468 will apply.This International Standard also specifies a group of supplementary requirements which may be applied to
21、 steel, nickel, and cobalt alloy castings. These requirements are provided for use when additional testing or inspection is desired and apply only when individually specified by the purchaser.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this docum
22、ent 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 148-1, Metallic materials Charpy pendulum impact test Part 1: Test methodISO 404:2013, Ste
23、el and steel products General technical delivery requirementsISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels Corrosion test in media containing sulfuric acidISO 4948-1, Steels Classi
24、fication Part 1: Classification of steels into unalloyed and alloy steels based on chemical compositionISO 4986, Steel castings Magnetic particle inspectionISO 4987, Steel castings Liquid penetrant inspectionISO 4992-1, Steel castings Ultrasonic examination Part 1: Steel castings for general purpose
25、sISO 4992-2, Steel castings Ultrasonic examination Part 2: Steel castings for highly stressed componentsISO 4993, Steel and iron castings Radiographic inspectionISO 6506-1, Metallic materials Brinell hardness test Part 1: Test methodISO 6892-1, Metallic materials Tensile testing Part 1: Method of te
26、st at room temperatureISO 6892-2, Metallic materials Tensile testing Part 2: Method of test at elevated temperatureISO 6929:2013, Steel products VocabularyISO 10474, Steel and steel products Inspection documentsISO 11970, Specification and approval of welding procedures for production welding of ste
27、el castingsISO 11971, Steel and iron castings Visual examination of surface qualityISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition ISO 2015 All rights reserved 1BS ISO 4990:2015ISO 4990:2015(E)ISO 18265, Metallic materials Conversion of har
28、dness values3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 404, ISO 4948-1, ISO 6929:2013, Clause 9, ISO 11970, and the following apply. In case of dispute, the terms and definitions in ISO 4990 apply.3.1cast (heat)all the molten metal poured from a
29、single furnace or all the molten metal from two or more furnaces poured into a single ladle or castingNote 1 to entry: The following are some examples the words in boldface are the criteria for determining the cast (heat) definition:a) all the molten metal from one or more furnaces poured into a sin
30、gle ladle or casting;b) all the molten metal in one melt in a single furnace.4 Information to be supplied by the purchaser4.1 The enquiry and order should include the information as specified in 4.1.1 and 4.1.2.4.1.1 A description of the casting(s) by pattern number and/or drawing. When a pattern is
31、 supplied, a complete list of the pattern equipment should be included. When a drawing is not supplied, the casting is purchased on the basis of the pattern. In that case, the foundry shall not be responsible for the dimensions of the part.NOTE Machining allowances, dimensional tolerances, and geome
32、trical tolerances can be selected from ISO 8062-3.All modifications to be made to the drawing, for the technical requirements of the manufacturer, shall form the subject of an agreement between the manufacturer and the purchaser.4.1.2 The material standard, delivery condition, and grade of steel, ni
33、ckel, or cobalt alloy.4.2 Where appropriate, the enquiry and order should include additional information, e.g.:a) any supplementary requirements in accordance with Annex B;b) non-destructive testing procedures to be used, extent of the non-destructive testing, and acceptance criteria;c) type of insp
34、ection document to be provided at the time of supply;d) size of a test lot, see 6.2.3.1;e) procedures for marking (in accordance with Clause 7), machining, protection, packaging, loading, dispatching, and the destination;f) submission of sample castings for approval before production quantities are
35、produced, see A.1.3;g) methods of statistical control to be used.Inspection and testing procedures shall conform to Annex A, including the place of inspection and testing for the purchaser, if the inspection or testing cannot be performed at the manufacturers works.2 ISO 2015 All rights reservedBS I
36、SO 4990:2015ISO 4990:2015(E)5 Conditions of manufacture5.1 Foundry practiceUnless otherwise agreed upon at the time of enquiry and order or specified in the material standard, the selection of the method of melting, moulding, heat treatment, etc., is left to the discretion of the manufacturer.5.2 Cl
37、eaning and dressingAll the castings shall be cleaned and dressed sufficiently to determine compliance with the requirements of 6.2.3. Additional dressing may be agreed to at the time of the enquiry and order.5.3 Production weldingUnless specified at the time of the enquiry and order, the casting(s)
38、may be subjected to production welding without the prior approval of the purchaser. Weld procedures for production welding shall be in accordance with ISO 11970.For a supplement specifying major finishing welds, see B.8.1 and B.8.2.6 Inspection and testing6.1 Non-specific inspectionThis inspection s
39、hall be arranged by the manufacturer and drawn up to ensure that the specified requirements are complied with.At the request of the purchaser at the time of the enquiry and ordering, the manufacturer shall supply a statement of compliance or test report on the basis of these non-specific inspections
40、 or tests.6.2 Specific inspection6.2.1 DocumentsInspection documents shall be agreed upon at the time of the enquiry and order and shall be in accordance with ISO 10474.If one of the documents for specific inspection and testing from ISO 10474 is ordered, the inspections and tests are to be carried
41、out in accordance with 6.2.2, 6.2.3, and Annex A.The inspection document shall contain the results of the chemical analysis and mechanical tests, including the results of any other tests required by the specification and by the purchaser. It shall include a statement that castings were manufactured
42、in accordance with the requirements of the specification.The inspection document shall be signed by an authorised agent of the manufacturer.Electronic data interchange (EDI): the manufacturers certification printed from or used in electronic form shall be regarded as having the same validity as a co
43、unterpart printed in the certifiers facility provided that it conforms to any existing agreement between the purchaser and the supplier.The inspection document shall provide the required traceability to the castings. ISO 2015 All rights reserved 3BS ISO 4990:2015ISO 4990:2015(E)6.2.2 Sampling, prepa
44、ration of test pieces, and mechanical and chemical test methods and requirements6.2.2.1 Test blocksThe test blocks may be cast separately, attached to the castings or cast integrally on the castings. When more than one ladle is used, the test block shall be cast integrally. They shall be produced fr
45、om the same cast (heat) of steel and shall be heat treated in the production furnaces to the same procedure as the casting(s) they represent.Unless otherwise specified, the test block shall be 28 mm minimum and the test pieces used for the mechanical tests shall be taken from test blocks with their
46、axes at least 7 mm from the surface. See B.6.1.2 and B.6.1.3.The test results represent the material from which the castings have been poured. They do not necessarily represent the properties of the castings. These can be affected by solidification conditions and the rate of cooling during heat trea
47、tment, which are in turn influenced by casting thickness, size, and shape.6.2.2.2 Mechanical tests6.2.2.2.1 Tensile tests at room temperatureOne tensile test shall be carried out per test lot (see 6.2.3.1). The shape, dimensions, and method shall comply with ISO 6892-1. The test results shall comply
48、 with the specification for the grade of material ordered.6.2.2.2.2 Impact testWhen the test is specified, it shall be carried out in accordance with ISO 148-1. Three Charpy test pieces with V-notches shall be prepared. The test temperature shall be as shown in the material specification. The averag
49、e value of absorbed energy from the three test pieces shall not be less than the value indicated in the material specification for the grade specified. Only one of the three values may be below but not less than 70 % of the minimum specified value.6.2.2.3 Retests6.2.2.3.1 Test results not in compliance with the specification are not valid when due to any one of the following conditions: defective assembly of the test piece or abnormal functioning of the test machine; defective manufa
