1、Magnesium and magnesium alloys Magnesium alloy ingots and castingsBS ISO 16220:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of ISO 16220:2017. It supersedes BS ISO 16220:2005, which is withdrawn.T
2、he UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys.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.
3、 Users are responsible for its correct application.ISBN 978 0 580 93954 9ICS 77.150.20Compliance 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 3l May 2017.Amendments/cor
4、rigenda issued since publicationDate Text affected BRITISH STANDARDBS ISO 16220:2017 ISO 2017Magnesium and magnesium alloys Magnesium alloy ingots and castingsMagnsium et alliages de magnsium Lingots et pices moules en alliage de magnsiumINTERNATIONAL STANDARDISO16220Third edition2017-04-15Reference
5、 numberISO 16220:2017(E)BS ISO 16220:2017ISO 16220:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, 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, el
6、ectronic 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 copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vern
7、ier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16220:2017ISO 16220:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Material designation 14.1 General . 14.2 Temper designation 14.3 Casting process desi
8、gnation 24.4 Designation for ordering 25 Requirements 25.1 Chemical composition 25.2 Mechanical properties of castings 25.3 Frequency of testing . 35.4 General condition of the product 36 Sampling 37 Test pieces for mechanical properties . 37.1 Design . 37.2 Test pieces obtained from separately cast
9、 samples 37.2.1 Sand-cast samples 37.2.2 Permanent-mould cast samples . 37.2.3 Pressure-die cast samples . 37.2.4 Investment cast samples . 47.3 Test pieces cut from castings 48 Test methods . 48.1 Tensile test 48.2 Brinell hardness test 49 Retests . 410 Rounding of numbers 4Annex A (informative) Li
10、st of ISO and equivalent international alloy designations 14Annex B (informative) Additional information regarding the manganese and iron content .16Annex C (informative) Additional information regarding maximum content of alloying elements and impurities in ingots and castings .17Bibliography .18 I
11、SO 2017 All rights reserved iiiContents PageBS ISO 16220:2017ISO 16220:2017(E)ForewordISO (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
12、 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 cl
13、osely 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/IEC Directives, Part 1. In particular the different approval criteri
14、a 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 possibility that some of the elements of this document may be the subject of pa
15、tent 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 patent declarations received (see www.iso.org/patents).Any trade name use
16、d in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the
17、 World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium.Th
18、is third edition cancels and replaces the second edition (ISO 16220:2005), which has been technically revised by the addition of new alloys. It also incorporates the amendment ISO 16220:2005/Amd.1:2007.iv ISO 2017 All rights reservedBS ISO 16220:2017ISO 16220:2017(E)IntroductionThis document classif
19、ies the magnesium alloys into a number of grades suitable for the applications to which they might be used.Some of the alloys referenced in this document can be the subject of a patent or of patent applications and their listing herein is not to be construed in any way as the granting of a licence u
20、nder such patent rights. ISO 2017 All rights reserved vBS ISO 16220:2017This page deliberately left blankMagnesium and magnesium alloys Magnesium alloy ingots and castings1 ScopeThis document specifies the chemical composition of magnesium alloy ingots and castings. It also specifies the mechanical
21、properties of separately cast samples of these alloys (see Clause 7). By agreement, it also specifies the mechanical properties of magnesium alloy castings determined from samples cut from a casting.2 Normative referencesThe following documents are referred to in the text in such a way that some or
22、all of their content constitutes requirements 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.NOTE For information on equivalent International Standards see Annex A.ISO 65
23、06-1, Metallic materials Brinell hardness test Part 1: Test methodISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 80000-1:2009, Quantities and units Part 1: GeneralEN 1559-5, Founding Technical condition of delivery Part 5: Additional requirements for mag
24、nesium alloy castings3 Terms and definitionsNo terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at
25、 http:/www.iso.org/obp4 Material designation4.1 GeneralThe material shall be designated as given in Tables 1 to 5.4.2 Temper designationThe following symbols for temper designation shall be used. F: as-cast; applies to products that require no heat treatment following the casting processes. T4: solu
26、tion heat-treated and naturally aged; applies to products that have no further treatment after solution heat treatment. T5: as-cast and artificially aged; applies to products that are cooled from the casting process, and then artificially aged to improve mechanical properties or dimensions.INTERNATI
27、ONAL STANDARD ISO 16220:2017(E) ISO 2017 All rights reserved 1BS ISO 16220:2017ISO 16220:2017(E) T6: solution heat-treated and artificially aged; applies to products that are solution heat treated followed by artificially aging.4.3 Casting process designationThe following symbols shall be used for t
28、he designation of the different casting processes. S: sand casting. K: permanent mould casting. D: pressure die casting. L: investment casting.4.4 Designation for orderingThe designation used for ordering shall include, in the following order, the number of castings, a mention of this document, the
29、ISO alloy designation, the designation for the heat treatment process (temper), and the designation for the casting process.EXAMPLE An order for 20 castings, conforming to this document, of magnesium alloy ISO-MC21120, delivered in as-cast (F temper) and made by sand casting (S) is as follows:20 cas
30、tings ISO 16220 - ISO-MgAl9Zn1(A) (or ISO-MC21120 or ISO-AZ91D)-F-S5 Requirements5.1 Chemical compositionThe chemical composition of magnesium alloy ingots shall conform to the requirements for the appropriate material given in Table 1.The chemical composition of magnesium alloy castings shall confo
31、rm to the requirements for the appropriate material given in Table 2.Conformance shall be determined by the manufacturer by analysing samples taken at the time the ingots or castings are produced.NOTE For additional information regarding the manganese and iron contents see Annex B.5.2 Mechanical pro
32、perties of castingsThe mechanical properties obtained from test pieces prepared from separately cast samples for sand castings and permanent mould castings shall meet the requirements given in Tables 3 and 4. As appropriate, the tests shall be carried out in accordance with Clause 8.NOTE 1 Mechanica
33、l properties obtained from test pieces prepared from separately cast samples for investment castings are not specified, as experience is limited. As a general rule they are similar to those for permanent mould castings.NOTE 2 The values obtained from test pieces cut from castings can differ from the
34、 minimum values specified in the tables because of imperfections (gas pores, shrinkage cavities, inclusions) and the machining process applied. Variation in the casting structure can also affect the property values.NOTE 3 For pressure-die castings, the mechanical properties strongly depend on the pr
35、ocess parameters; therefore, the properties given in Table 5 are for guidance only.2 ISO 2017 All rights reservedBS ISO 16220:2017ISO 16220:2017(E)The Brinell hardness test shall be carried out on sound areas of castings or on a test piece that has not been stressed. Hardness tests are only to be ca
36、rried out where appropriate and when there is a real difference between the different states of heat treatment.5.3 Frequency of testingThe frequency of testing shall be in accordance with EN 1559-5.5.4 General condition of the productIngots shall be free of dust, burrs, salty inclusions and be homog
37、eneous in thickness and weight to a standard agreed with the purchaser.Castings shall have a clean surface and shall be free from visible and internal imperfections to a standard also agreed between the manufacturer and the purchaser.6 SamplingConditions for sampling, formation of batches and freque
38、ncy of verification shall be as specified in EN 1559-5.7 Test pieces for mechanical properties7.1 DesignThe design of test pieces shall be subject to an agreement between the manufacturer and the purchaser.7.2 Test pieces obtained from separately cast samples7.2.1 Sand-cast samplesTest pieces may be
39、 in the machined or unmachined condition.The following conditions shall apply: samples shall be cast in sand moulds and without artificial chilling; the minimum diameter of the test piece shall be 12 mm; the gauge length and the parallel length shall conform to ISO 6892-1.7.2.2 Permanent-mould cast
40、samplesTest pieces may be in the machined or unmachined condition.The following conditions shall apply: the minimum diameter of the test piece shall be 12 mm; the gauge length and parallel length shall conform to ISO 6892-1.7.2.3 Pressure-die cast samplesFor pressure die castings, it is not recommen
41、ded to test mechanical properties on separately cast bars or coupons. It is more appropriate to test the whole casting under conditions comparable to the ones expected in service. ISO 2017 All rights reserved 3BS ISO 16220:2017ISO 16220:2017(E)The values given in Table 5 are for guidance only. These
42、 are not typical, but they are the minimum values that can be expected on separately pressure cast bars (with none or very limited machining) and with a cross section of 20 mm2and a typical thickness of 2 mm.7.2.4 Investment cast samplesTest pieces may be in the machined or unmachined condition.The
43、following conditions shall apply: the minimum diameter of the test piece shall be 5 mm; the gauge length and parallel length shall conform to ISO 6892-1.7.3 Test pieces cut from castingsThe geometry and location of test pieces cut from castings shall be specified by agreement between the manufacture
44、r and the purchaser.If it is agreed between the manufacturer and the purchaser to use circular cross-section test pieces, the minimum diameter shall be 4 mm.8 Test methods8.1 Tensile testTensile tests shall be carried out in accordance with ISO 6892-1.8.2 Brinell hardness testBrinell hardness tests
45、shall be carried out in accordance with ISO 6506-1.A test ball of 5 mm diameter is recommended. By agreement between the manufacturer and the purchaser, a smaller ball diameter may be used for thin-wall castings.9 RetestsRetests shall be carried out in accordance with EN 1559-5.10 Rounding of number
46、sThe number representing the result for any value specified in this document shall be expressed with the same number of decimal places as the corresponding number in this document. The rounding of numbers shall meet the requirements of ISO 80000-1:2009, B.3, rule A or B. The choice shall be left to
47、the discretion of the manufacturer, unless the use of one of the rules is agreed by the time of acceptance of the order.4 ISO 2017 All rights reservedBS ISO 16220:2017ISO 16220:2017(E)Table1 Chemical composition of magnesium alloy ingotsAlloygroupMaterialdesignationComposition% mass fractionDesignat
48、ionby symbolsDesignationbynumbersASTM desig-nationMin. or max.MgAlZnMnaREbZrAgYGdLiSrCaSiFeCuNiOther eachMgAlZnISO-MgAl8Zn1ISO-MB21110AZ81min. max.Rem.7,28,50,450,90,170,40,050,0040,0250,0010,05ISO-MgAl9Zn1(A)ISO-MB21120AZ91min. max.Rem.8,59,50,450,90,170,400,080,0040,0250,0010,01ISO-MgAl9Zn1(B)ISO-
49、MB21121AZ91min. max.Rem.8,010,00,31,00,10,500,30,030,0200,010,05ISO-MgAl9Zn-1CaISO-MB21122AZ91minmaxRem.8,59,50,450,90,170,400,52,5 0,08 0,004 0,025 0,001 0,01ISO-MgAl6Zn3ISO-MB21130AZ63min. max.Rem.5,56,52,73,30,150,350,050,0050,0150,0010,05MgAlMnISO-MgAl2MnISO-MB21210AM20min. max.Rem.1,72,50,200,350,600,080,0040,0080,0010,01ISO-MgAl5MnISO-MB21220AM50min. max.Rem.4,55,30,300,280,500,080,0040,0080,0010,01ISO-MgAl6MnISO-MB21230AM60min. max.Rem.5,66,40,300,260,500,20,004
