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1、 Reference number ISO 16220:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 16220 Second edition 2005-03-01 Magnesium and magnesium alloys Magnesium alloy ingots and castings Magnsium et alliages de magnsium Lingots et pices moules en alliage de magnsium -,-,- ISO 16220:2005(E) PDF disclaimer This PDF f
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4、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 2005 All rights reserved. U
5、nless 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 ISOs member body in the country of the requester. IS
6、O copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved ISO 16220:2005(E) ISO 2005 All rights reserved iii Contents Page Forewordiv Introduction v 1 Scope1 2 Nor
7、mative references .1 3 Designation1 4 Requirements 2 5 Sampling3 6 Test pieces for mechanical properties .3 7 Test methods.4 8 Retests .4 9 Rounding of numbers.4 Annex A (informative) List of European, national and former national European designations corresponding, but not necessarily identical to
8、, the former ISO designations .9 Annex B (informative) Additional information regarding the manganese and iron content.10 Annex C (informative) Additional information regarding maximum content of alloying elements and impurities in ingots and castings 11 Bibliography .12 ISO 16220:2005(E) iv ISO 200
9、5 All rights reserved 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
10、 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 Commissio
11、n (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 co
12、mmittees 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 no
13、t be held responsible for identifying any or all such patent rights. ISO 16220 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium. This second edition cancels and replaces the first edition (ISO 16220:200
14、0), which has been technically revised. ISO 16220:2005(E) ISO 2005 All rights reserved v Introduction This International Standard classifies the commercially available magnesium alloys into a number of grades suitable for the applications to which they might be put. Some of the alloys referenced in
15、this International Standard 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 license under such patent rights. This International Standard is technically identical with European Standard EN 1753, except for some
16、minor deviation in Ni content, Mn content and Fe/Mn ratio. Grade designation also differs slightly; the correlation is given in Annex A. -,-,- INTERNATIONAL STANDARD ISO 16220:2005(E) ISO 2005 All rights reserved 1 Magnesium and magnesium alloys Magnesium alloy ingots and castings 1 Scope This Inter
17、national Standard specifies the chemical composition of magnesium alloy ingots. It also specifies the chemical composition of magnesium alloy castings and the mechanical properties of separately cast samples of these alloys (see Clause 6). By agreement, this International Standard also specifies the
18、 mechanical properties of magnesium alloy castings determined from samples cut from a casting. 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 ed
19、ition of the referenced document (including any amendments) applies. ISO 31-0, Quantities and units Part 0: General principles ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6892, Metallic materials Tensile testing at ambient temperature EN 1559-5, Founding Technical co
20、ndition of delivery Part 5: Additional requirements for magnesium alloy castings 3 Designation 3.1 Material The material shall be designated by symbols as given in Tables 1 to 5. NOTE 1 The material symbol designations are in accordance with ISO 2092:19811). The material number designations are iden
21、tical to those used in EN 1753. NOTE 2 A list of European designations, national and former national European designations corresponding to those specified in this International Standard is given in Annex A. 3.2 Temper designation The following symbols for temper designation shall be used: F: as-cas
22、t; applies to products that acquire some temper from casting processes not having special control over the amount of thermal treatment; 1) Withdrawn in 2002. -,-,- ISO 16220:2005(E) 2 ISO 2005 All rights reserved T4: solution heat-treated and naturally aged; applies to products that have no further
23、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; T6: solution heat-treated and artificially aged; applies to products that are solution
24、heat treated followed by artificially ageing. 3.3 Casting process designation The following symbols shall be used for the designation of the different casting processes: S: sand casting; K: permanent-mould casting; D: pressure-die casting; L: investment casting. 3.4 Designation for ordering The desi
25、gnation used for ordering shall include, in the following order, the number of castings, a mention of this International Standard, the ISO alloy designation, the designation for the heat treatment process (temper), and the designation for the casting process. EXAMPLE An order for 20 castings conform
26、ing to this International Standard, of magnesium alloy ISO-MC21120, delivered in as-cast (F temper) and made by sand casting (S), is as follows: 20 castings ISO 16220 ISO-MgAl9Zn1(A) (or ISO-MC21120)-F-S 4 Requirements 4.1 Chemical composition The chemical composition of magnesium alloy ingots shall
27、 conform to the requirements for the appropriate material given in Table 1. The chemical composition of magnesium alloy castings shall conform 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
28、 the ingots or castings are produced. NOTE For additional information regarding the manganese and iron contents, see Annex B. 4.2 Mechanical properties of castings The mechanical properties obtained from test pieces prepared from separately cast samples for sand castings and permanent-mould castings
29、 shall meet the requirements given in Tables 3 and 4. As appropriate, the tests shall be carried out in accordance with Clause 7. NOTE 1 Mechanical properties obtained from test pieces prepared from separately cast samples for investment castings are not specified, as experience is limited. As a gen
30、eral rule they are similar to those for permanent mould castings. -,-,- ISO 16220:2005(E) ISO 2005 All rights reserved 3 NOTE 2 The values obtained from test pieces cut from castings can differ from the minimum values specified in the tables because of variation in structure arising from differences
31、 in section thickness and soundness. NOTE 3 The mechanical properties obtained from test pieces prepared from separately cast samples, especially for pressure-die castings, are very dependent upon injection and process parameters; therefore, the properties given in Table 5 are for guidance only. The
32、 Brinell hardness test shall be carried out on sound areas of castings or on a test piece which has not been stressed. 4.3 Frequency of testing The frequency of testing shall be in accordance with EN 1559-5. 4.4 General condition of the product The product shall have a clean surface according to agr
33、eement between the manufacturer and the purchaser, and shall be commercially free from visible and internal defects to a standard also agreed between the manufacturer and the purchaser. 5 Sampling Conditions for sampling, formation of batches and frequency of verification shall be as specified in EN
34、 1559-5. 6 Test pieces for mechanical properties 6.1 Design The design of test pieces shall be subject to agreement between the manufacturer and the purchaser. 6.2 Test pieces obtained from separately cast samples 6.2.1 Sand-cast samples Test pieces may be in the machined or unmachined condition. Th
35、e 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. 6.2.2 Permanent-mould cast samples Test pieces may be in the machined o
36、r 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. -,-,- ISO 16220:2005(E) 4 ISO 2005 All rights reserved 6.2.3 Pressure-die cast samples The following condition shall ap
37、ply: the surface of the test pieces shall be as cast. 6.2.4 Investment cast samples Test pieces may be in the machined or unmachined condition. The 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.
38、6.3 Test pieces cut from castings The geometry and location of test pieces cut from castings shall be specified by agreement between the manufacturer and the purchaser. If it is agreed between the manufacturer and the purchaser to use test pieces of circular cross-section, the minimum diameter shall
39、 be 4 mm. 7 Test methods 7.1 Tensile test Tensile tests shall be carried out in accordance with ISO 6892. 7.2 Brinell hardness test Brinell hardness tests 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 pu
40、rchaser, a smaller ball diameter may be used for thin-wall castings. 8 Retests Retests shall be carried out in accordance with EN 1559-5. 9 Rounding of numbers The number representing the result for any value specified in this International Standard shall be expressed to the same number of decimal p
41、laces as the corresponding number in this International Standard. The rounding of numbers shall meet the requirements of ISO 31-0:1992, B.3, rule A or B. The choice shall be left to the discretion of the manufacturer, unless the use of one of the rules is agreed by the time of acceptance of the orde
42、r. ISO 16220:2005(E) ISO 2005 All rights reserved 5 Table 1 Chemical composition of magnesium alloy ingots Material designation Composition % mass fraction Alloy group In accordance with ISO 2092:1981 a In accordance with EN 1753 Min. or max. Mg Al Zn Mn bRE c Zr Ag Y Li Si Fe Cu Ni Others each ISO-
43、MgAl9Zn1 (A) ISO-MB21120 min. max. Rem. 8,5 9,5 0,45 0,9 0,17 0,40 0,08 0,004 0,025 0,001 0,01 MgAlZn ISO-MgAl9Zn1 (B) ISO-MB21121 min. max. Rem. 8,0 10,0 0,3 1,0 0,1 0,50 0,3 0,03 0,20 0,01 0,05 ISO-MgAl2Mn ISO-MB21210 min. max. Rem. 1,7 2,5 0,20 0,35 0,60 0,05 0,004 0,008 0,001 0,01 ISO-MgAl5Mn IS
44、O-MB21220 min. max. Rem. 4,5 5,3 0,30 0,28 0,50 0,08 0,004 0,008 0,001 0,01 MgAlMn ISO-MgAl6Mn ISO-MB21230 min. max. Rem. 5,6 6,4 0,30 0,26 0,50 0,08 0,004 0,008 0,001 0,01 ISO-MgAl2Si ISO-MB21310 min. max. Rem. 1,9 2,5 0,20 0,2 0,6 0,7 1,2 0,004 0,008 0,001 0,01 MgAlSi ISO-MgAl4Si ISO-MB21320 min.
45、max. Rem. 3,7 4,8 0,20 0,2 0,6 0,7 1,2 0,004 0,008 0,001 0,01 MgZnCu ISO-MgZn6Cu3Mn ISO-MB32110 min. max. Rem. 0,2 5,5 6,5 0,25 0,75 0,20 0,05 2,4 3,0 0,01 0,01 ISO-MgZn4RE1Zr ISO-MB35110 min. max. Rem. 3,5 5,0 0,15 1,0 1,75 0,1 1,0 0,01 0,01 0,03 0,005 0,01 MgZnREZr d ISO-MgRE3Zn2Zr ISO-MB65120 min
46、. max. Rem. 2,0 3,0 0,15 2,4 4,0 0,1 1,0 0,01 0,01 0,03 0,005 0,01 ISO-MgAg2RE2Zr ISO-MB65210 min. max. Rem. 0,2 0,15 2,0 3,0 0,1 1,0 2,0 3,0 0,01 0,01 0,03 0,005 0,01 MgREAgZr e ISO-MgRE2Ag1Zr ISO-MB65220 min. max. Rem. 0,2 0,15 1,5 3,0 0,1 1,0 1,3 1,7 0,01 0,01 0,05 0,10 0,005 0,01 ISO-MgY5RE4Zr I
47、SO-MB95310 min. max. Rem. 0,20 0,15 2,0 4,0 0,1 1,0 4,75 5,5 0,20 0,01 0,01 0,03 0,005 0,01 MgYREZr f, g ISO-MgY4RE3Zr ISO-MB95320 min. max. Rem. 0,20 0,15 2,4 4,4 0,1 1,0 3,7 4,3 0,20 0,01 0,01 0,03 0,005 0,01 a Withdrawn in 2002. b For maximum manganese content, see Annex B. c RE = rare earth metals. d Cerium-rich. e Neodymium-rich. f Neodymium- and heavy RE-rich. g Improved corrosion resistance can be obtained by reducing the maximum manganese content to 0,03 %, th
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