1、BSI Standards PublicationBS ISO 11972:2015Corrosion-resistant cast steelsfor general applicationsBS ISO 11972:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 11972:2015. The UK participation in its preparation was entrusted to TechnicalCommittee ISE/111, S
2、teel 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 2
3、015.Published by BSI Standards Limited 2015ISBN 978 0 580 76498 1 ICS 77.140.20; 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.Amen
4、dments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 11972:2015 ISO 2015Corrosion-resistant cast steels for general applicationsAciers mouls rsistant la corrosion pour applications courantesINTERNATIONAL STANDARDISO11972Second edition2015-09-15Reference numberISO 11972:2015(E
5、)BS ISO 11972:2015ISO 11972:2015(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,
6、 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 copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, Switzerlan
7、dTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 11972:2015ISO 11972:2015(E)Foreword iv1 Scope . 12 Normative reference . 13 General conditions for delivery 14 Chemical composition . 15 Mechanical properties 16 Heat treatment . 17 Supplementary requirements 5Annex A (infor
8、mative) UNS cast grades similar to ISO cast grades . 6Bibliography 7 ISO 2015 All rights reserved iiiContents PageBS ISO 11972:2015ISO 11972:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
9、 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
10、, 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 ISO
11、/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 possibili
12、ty 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 pat
13、ent 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 info
14、rmation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC17, Steel, Subcommitee SC11, Steel castings.This second edition cancels and replaces the first e
15、dition (ISO 11972:1998), which has been technically revised with the following changes: Clause 7 revised; Table 1 composition limits modified various grades; Tables 1, 2, and 3 grade numbers added; Annex A added.iv ISO 2015 All rights reservedBS ISO 11972:2015INTERNATIONAL STANDARD ISO 11972:2015(E)
16、Corrosion-resistant cast steels for general applications1 ScopeThis International Standard specifies cast steels for general corrosion-resistant applications. The grades covered by this International Standard represent types of alloy steel castings suitable for broad ranges of application which are
17、intended for a wide variety of corrosion applications.NOTE Annex A gives information on ISO grade designation and available UNS numbers which are similar to the ISO grade designation.2 Normative referenceThe following documents, in whole or in part, are normatively referenced in this document and ar
18、e 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 conditions3 General conditions for deliveryMaterials
19、 furnished according to this International Standard shall conform to the applicable requirements of ISO 4990 including the supplementary requirements that are indicated on the inquiry and purchase order.4 Chemical compositionThe steel shall conform to the requirements for chemical composition specif
20、ied in Table 1.5 Mechanical propertiesSteel used for castings shall conform to the mechanical property requirements given in Table 2 up to the maximum ruling thickness. Verification of impact tests is not required except when indicated by the customer. Test blocks used to verify mechanical propertie
21、s shall not have a thickness exceeding 150 mm. For samples removed from castings, the mechanical properties required shall be agreed between the manufacturer and purchaser.6 Heat treatmentCastings shall be heat treated in accordance with the requirements in Table 3. ISO 2015 All rights reserved 1BS
22、ISO 11972:2015ISO 11972:2015(E)Table 1 Chemical composition, % (m/m) Grade designation Chemical compositionName Number C Si Mn P S Cr Mo Ni OthersGX12Cr12 1.4011 0,15 1,0 1,0 0,035 0,025 11,5 to 13,5 0,50 1,0GX7CrNiMo121 1.4008 0,10 1,0 1,0 0,035 0,025 12,0 to 13,5 0,20 to 0,50 1,0 to 2,0GX4CrNi134
23、(QT1)GX4CrNi134 (QT2)1.4317 0,06 1,0 1,0 0,035 0,025 12,0 to 13,5 0,70 3,5 to 5,0GX4CrNiMo165-1 1.4405 0,06 0,8 1,0 0,035 0,025 15,0 to 17,0 0,70 to 1,50 4,0 to 6,0GX2CrNi1911 1.4309 0,03 1,5 2,0 0,035 0,025 18,0 to 20,0 9,0 to 12,0 N 0,20GX2CrNiN1911 1.4487 0,03 1,5 1,5 0,040 0,030 18,0 to 20,0 9,0
24、 to 12,0 N 0,12 to 0,20GX5CrNi1910 1.4308 0,07 1,5 1,5 0,040 0,030 18,0 to 20,0 8,0 to 11,0GX5CrNiNb1911 1.4552 0,07 1,5 1,5 0,040 0,030 18,0 to 20,0 9,0 to 12,0 8 C Nb 1,00GX2CrNiMo19112 1.4409 0,03 1,5 2,0 0,035 0,025 18,0 to 20,0 2,00 to 2,50 9,0 to 12,0 N 0,20GX2CrNiMoN19112 1.4490 0,03 1,5 2,0
25、0,035 0,030 18,0 to 20,0 2,00 to 2,50 9,0 to 12,0 N 0,12 to 0,20GX4CrNiMoN265-2 1.4474 0,05 1,0 2,0 0,035 0,025 25,0 to 27,0 1,30 to 2,00 4,5 to 6,5 N 0,12 to 0,20GX5CrNiMo19112 1.4408 0,07 1,5 1,5 0,040 0,030 18,0 to 20,0 2,00 to 2,50 9,0 to 12,0GX5CrNiMoNb19112 1.4581 0,07 1,5 1,5 0,040 0,030 18,0
26、 to 20,0 2,00 to 2,50 9,0 to 12,0 8 C Nb 1,00GX2CrNiMo19113 1.4518 0,03 1,5 1,5 0,040 0,030 18,0 to 20,0 3,00 to 3,50 9,0 to 12,0GX2CrNiMoN19113 1.4508 0,03 1,5 1,5 0,040 0,030 18,0 to 20,0 3,00 to 3,50 9,0 to 12,0 N 0,10 to 0,20GX2CrNiMoN225-3 1.4470 0,03 1,0 2,0 0,035 0,025 21,0 to 23,0 2,50 to 3,
27、50 4,5 to 6,5 N 0,12 to 0,20GX2CrNiMoN257-3 1.4417 0,03 1,0 1,5 0,030 0,020 24,0 to 26,0 3,00 to 4,00 6,0 to 8,5Cu 1,00N 0,15 to 0,25W 1,00GX2CrNiMoN267-4 1.4469 0,03 1,0 1,0 0,035 0,025 25,0 to 27,0 3,00 to 5,00 6,0 to 8,0N 0,12 to 0,22Cu 1,30GX5CrNiMo19113 1.4412 0,07 1,5 1,5 0,040 0,030 18,0 to 2
28、0,0 3,00 to 3,50 10,0 to 13,0GX2NiCrMo-CuN252061.4588 0,02 1,0 2,00 0,035 0,020 19,0 to 21,0 6,00 to 7,00 24,0 to 26,0N 0,10 to 0,25Cu 0,50 to 1,50GX2CrNiMo-CuN201861.4557 0,02 1,0 1,20 0,030 0,010 19,5 to 20,5 6,00 to 7,00 17,5 to 19,5N 0,18 to 0,24Cu 0.50 to 1.00GX2CrNiMo-CuN256-331.4517 0,03 1,0
29、1,50 0,035 0,025 24,5 to 26,5 2,50 to 3,50 5,0 to 7,0N: 0,12 to 0,22Cu: 2,75 to 3,50GX3CrNiMoCuN266-3 1.4515 0,03 1,0 2,00 0,030 0,020 24,5 to 26,5 2,50 to 3,50 5,5 to 7,0N 0,12 to 0,25Cu: 0,80 to 1,30GX2CrNiMoN256-3 1.4468 0,03 1,0 2,0 0,035 0,025 24,5 to 26,5 2,50 to 3,50 5,5 to 7,0 N 0,12 to 0,25
30、NOTE A single value in the table indicates the maximum limit.2 ISO 2015 All rights reservedBS ISO 11972:2015ISO 11972:2015(E)Table 2 Mechanical properties at room temperaturebGrade designation Rp0,2minMPaRmmin.MPaAmin.%KVmin.JMaximum ruling thicknessmmName NumberGX12Cr12 1.4011 450 620 15 20 150GX7C
31、rNiMo121 1.4008 440 590 15 27 300GX4CrNi134 (QT1)1.4317550 750 15 50 300GX4CrNi134 (QT2) 830 900 12 35 300GX4CrNiMo165-1 1.4405 540 760 15 60 300GX2CrNi1911 1.4309 185 440 30 80 150GX2CrNiN1911 1.4487 230a510 30 80 150GX5CrNi1910 1.4308 175a440 30 60 150GX5CrNiNb1911 1.4552 175a440 25 40 150GX2CrNiM
32、o19112 1.4409 195a440 30 80 150GX2CrNiMoN19112 1.4490 230a510 30 80 150GX4CrNiMoN265-2 1.4474 420 600 20 30 150GX5CrNiMo19112 1.4408 185a440 30 60 150GX5CrNiMoNb19112 1.4581 185a440 25 40 150GX2CrNiMo19113 1.4518 180a440 30 80 150GX2CrNiMoN19113 1.4508 230a510 30 80 150GX2CrNiMoN225-3 1.4470 420 600
33、 20 30 150GX2CrNiMoN257-3 1.4417 480 650 22 50 150GX2CrNiMoN267-4 1.4469 480 650 22 50 150GX5CrNiMo19113 1.4412 205a440 30 60 150GX2NiCrMoCuN25206 1.4588 210 480 30 60 50GX2CrNiMoCuN20186 1.4557 260 500 35 50 50GX2CrNiMoCuN256-33 1.4517 480 650 22 50 150GX3CrNiMoCuN266-3 1.4515 480 650 22 60 200GX2C
34、rNiMoN256-3 1.4468 480 650 22 50 150aThe minimum Rp1,0value is 25 MPa higher.b1 MPa = 1 N/mm2 ISO 2015 All rights reserved 3BS ISO 11972:2015ISO 11972:2015(E)Table 3 Heat treatmentGrade designationTreatmentName NumberGX12Cr12 1.4011Austenitize at 950 C to 1 050 C; air cool. Temper at 650 C to 750 C;
35、 air cool.GX7CrNiMo121 1.4008Austenitize at 1 000 C to 1 050 C; air cool. Temper at 620 C to 720 C; air or furnace cool.GX4CrNi134 (QT1) 1.4317Austenitize at 1 000 C to 1 050 C; air cool. Temper at 570 C to 620 C; air or furnace cool.GX4CrNi134 (QT2) 1.4317Austenitize at 1 000 C to 1050 C; air cool.
36、 Temper at 500 C to 530 C; air or furnace cool.GX4CrNiMo165-1 1.4405Austenitize at 1 020 C to 1 070 C; air cool. Temper at 580 C to 630 C; air or furnace cool.GX2CrNi1911 1.4309Solution treat at 1 050 to 1 150 C; quench. Depending on thickness, accelerated air cooling.GX2CrNiN1911 1.4487Solution tre
37、at at 1 050 C; quench. Depending on thickness, accelerated air cooling.GX5CrNi1910 1.4308Solution treat at 1 050 C to 1 150 C ; quench. Depending on thickness, accelerated air cooling.GX5CrNiNb1911 1.4552Solution treat at 1 050 to 1 150 C; quench. Depending on thickness, accelerated air cooling.GX2C
38、rNiMo19112 1.4409Solution treat at 1 080 C to 1 150 C ; quench. Depending on thickness, accelerated air coolingGX2CrNiMoN19112 1.4490Solution treat at 1 080 C; quench. Depending on thickness, accelerated air cooling.GX4CrNiMoN265-2 1.4474Solution treat at 1 120 C to 1 150 C; quench in water. After s
39、olution annealing at high temperature, castings may be cooled to 1 040 C to 1 010C prior to water quenching in order to prevent cracks in complex shapes.GX5CrNiMo19112 1.4408Solution treat at 1 080 C to 1 150 C; quench. Depending on thickness, accelerated air cooling.GX5CrNiMoNb19112 1.4581Solution
40、treat at 1 080 to 1 150 C; quench. Depending on thickness, accelerated air cooling.GX2CrNiMo19113 1.4518Solution treat at 1 120 C min.; quench. Depending on thickness, accelerated air cooling.GX2CrNiMoN19113 1.4508Solution treat at 1 120 C min.; quench. Depending on thickness, accelerated air coolin
41、g.GX2CrNiMoN225-3 1.4470Solution treat at 1 120 C to 1 150 C; quench in water. After solution anneal-ing at high temperature, castings may be cooled to 1 040 C to 1010C prior to water quenching in order to prevent cracks in complex shapes.GX2CrNiMoN257-3 1.4417Solution treat at 1 120 C to 1 150 C; q
42、uench in water. After solution annealing at high temperature, castings may be cooled to 1 040 C to 1 010C prior to water quenching in order to prevent cracks in complex shapes.GX2CrNiMoN267-4 1.4469Solution treat at 1 120 C to 1 150 C; quench in water. After solution annealing at high temperature, c
43、astings may be cooled to 1 040 C to 1 010C prior to water quenching in order to prevent cracks in complex shapes.GX5CrNiMo19113 1.4412Solution treat at 1 120 to 1 180 C; quench. Depending on thickness, accelerated air cooling.GX2NiCrMoCuN25206 1.4588 Solution treat at 1 200 C to 1 240 C for 4 h mini
44、mum, quench in water.4 ISO 2015 All rights reservedBS ISO 11972:2015ISO 11972:2015(E)Grade designationTreatmentName NumberGX2CrNiMoCuN20186 1.4557 Solution treat at 1 200 C to 1 240 C for 4 h minimum, quench in water.GX2CrNiMoCuN256-33 1.4517Solution treat at 1 120 C to 1 150 C; quench in water. Aft
45、er solution annealing at high temperature, castings may be cooled to 1 040 C to 1 010C prior to water quenching in order to prevent cracks in complex shapes.GX3CrNiMoCuN266-3 1.4515Solution treat at 1 120 C to 1 150 C; quench in water. After solution annealing at high temperature, castings may be co
46、oled to 1 040 C to 1 010C prior to water quenching in order to prevent cracks in complex shapes.GX2CrNiMoN256-3 1.4468Solution treat at 1 120 C to 1 150 C; quench in water. After solution annealing at high temperature, castings may be cooled to 1 040 C to 1 010C prior to water quenching in order to
47、prevent cracks in complex shapes.7 Supplementary requirementsA list of standardized supplementary requirements for use at the option of the purchaser is included in ISO 4990. Others, whether or not in ISO 4990, may be used with this International Standard upon agreement by the manufacturer and purch
48、aser.Table 3 (continued) ISO 2015 All rights reserved 5BS ISO 11972:2015ISO 11972:2015(E)Annex A (informative) UNS cast grades similar1)to ISO cast gradesTable A.1 UNS cast grades similar to ISO cast gradesGrade designation UNS number(similar grade)Name NumberGX12Cr12 1.4011 J91150GX7CrNiMo121 1.400
49、8 GX4CrNi134 (QT1) 1.4317 J91540 (CA6NM)GX4CrNi134 (QT2) 1.4317 J91540 (CA6NM)GX4CrNiMo165-1 1.4405 GX2CrNi1911 1.4309 J92500 (CF3)GX2CrNiN1911 1.4487 GX5CrNi1910 1.4308 J92600 (CF8)GX5CrNiNb1911 1.4552 (CF8Cb)GX2CrNiMo19112 1.4409 J92800 (CF3M)GX2CrNiMoN19112 1.4490 GX4CrNiMoN265-2 1.4474 J 93371GX5CrNiMo19112 1.4408 GX5CrNiMoNb19
