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1、AS 18811986 Australian Standard ZINC ALLOYSCASTING INGOTS AND CASTINGS QUALITY REQUIREMENTS This Australian Standard was prepared by Committee MT/4, Zinc and Zinc Alloys. It was approved on behalf of the Council of the Standards Association of Australia on 31 October 1985 and published on 6 January
2、1986. The following interests are represented on Committee MT/4: Australian Zinc Development Association Confederation of Australian Industry Department of Defence Diecasting Institute of Australia Electricity Supply Association of Australia Federal Chamber of Automotive Industries Review of Austral
3、ian Standards. To keep abreast of progress in industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they are in possession of the latest edition, and an
4、y amendments thereto. Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine The Australian Standard, which subscribing members receive, and which gives details
5、of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed. Notification of any inaccuracy or ambiguity found in an Australian Standard should be made without de
6、lay in order that the matter may be investigated and appropriate action taken. This standard was issued in draft form for comment as DR 82180. The Standard is downloaded from Standard Sharing AS 18811986 Australian Standard ZINC ALLOYSCASTING INGOTS AND CASTINGS QUALITY REQUIREMENTS First published
7、 (as AS H63 and H64). . . . . . . .1962 AS 1881 first published . . . . . . . . . . . . . . . . . .1977 Second edition. . . . . . . . . . . . . . . . . . . . . . . .1986 PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) 1 THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 0 7262 4020 6 AS 188
8、119862 PREFACE This edition of this standard was prepared by the Associations Committee on Zinc and Zinc Alloys. It provides for the supply of zinc alloys in ingot form for gravity castings and pressure diecastings and for castings made from them. The scope of this standard was expanded to provide f
9、or gravity castings and zinc alloy ingots for their manufacture. The alloy designation adopted in the standard is that used in international standards, but the chemical composition of the diecasting alloys differs slightly from ISO 301, Zinc Alloy Ingots Intended for Casting, to reflect Australian p
10、ractice; the expression of thallium and indium as a sum total, and the aluminium content of Zn Al 11 Cu 1, in particular, are different. Appendix A sets out purchasing guidelines, including contractual requirements, and directs attention to matters requiring consideration at the time of enquiry and/
11、or order. Information on mechanical properties to be expected after certain periods of ageing is contained in Appendices B, C and D. The Committee considered preparation of an Australian standard for the design and manufacture of zinc alloy pressure and gravity diecastings. It recommended that this
12、should proceed, particularly in the light of the discontinuation of the Certizinc Scheme of the Diecasting Institute of Australia, and technical developments both locally and overseas. The Association accepted this recommendation and a standard shall be prepared. The Standard is downloaded from Sta
13、ndard Sharing 3AS 18811986 CONTENTS Page SECTION1. SCOPE ANDGENERAL 1.1Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.2Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.3Referenced Documents . . . . . . . . .
14、. . . . . . . . . . . . . . . . . . . . . .4 1.4Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.5Interpretation of Specified Limiting Values. . . . . . . . . . . . . . . .4 SECTION2. ZINCALLOYINGOTS FORCASTING 2.1Chemical Composition . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . .5 2.2Freedom from Defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 2.3Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SECTION3. ZINCALLOYCASTINGS 3.1Process of Manufacture. . . . . . . . . . . .
16、. . . . . . . . . . . . . . . . . .6 3.2Chemical Composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 3.3Condition of Castings on Delivery . . . . . . . . . . . . . . . . . . . . . . .6 3.4Freedom from Defects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 3.5Mar
17、king . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 APPENDICES APurchasing Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 BProperties of Alloys A and B from British Work . . . . . . . . . . . . .10 CProperties of Alloy Zn Al 4, from Austr
18、alian Work . . . . . . . . . . .12 DMechanical Properties of Casting Alloys. . . . . . . . . . . . . . . . . .13 AS 188119864 STANDARDS ASSOCIATION OF AUSTRALIA Australian Standard for ZINC ALLOYSCASTING INGOTS AND CASTINGSQUALITY REQUIREMENTS SECTION 1. SCOPE AND GENERAL 1.1 SCOPE. Thisstandardspec
19、ifiesquality requirements and conditions of supply for zinc alloys in ingot form for pressure diecasting and gravity cast- ing and for castings made from them. NOTES: 1. Properties of alloys are given in Appendices B, C and D. 2. Guidelines to purchaserson requirements that must be specified by the
20、purchaser and those that must be agreed upon at the time of enquiry and/or order are given in Appendix A. 1.2 APPLICATION. Zinc alloy ingots shall com ply with the relevant requirements of Section l and with the requirements of Section 2 for the designated alloy. Castings shall comply with the relev
21、ant requirements of Section 1; requirements of Section 3 will apply for castings made from the designated alloy. 1.3 REFERENCEDDOCUMENTS. The follow ing standards are referred to in this standard: AS 1242Zinc Ingot AS 1329Methods for the Analysis of Zinc and Zinc Alloys AS 1874Aluminium Ingots and A
22、luminium Alloy Ingots and Castings AS 2347Method for the Sampling of Zinc Metal and Zinc Alloys for Chemical Analysis AS 2706NumericalValuesRoundingand Interpretation of Limiting Values BS 1004Zinc Alloys for Die Casting and Zinc Alloy Die Castings. 1.4 DESIGNATION. 1.4.1 General. Zinc alloy designa
23、tion shall include the following: (a)The number of this Australian standard, i.e. AS 1881. (b)Chemical symbols and figures indicating the alloying elements and their approximate mean levels. 1.4.2 Dimensionallystabilizedcastings. When dimensionally stabilized castings are required, the letter S in b
24、rackets shall be added to the alloy designation. Examples of designation: AS 1881/Zn Al 4 Cu 1, AS 1881/Zn Al 4 (S). 1.5 INTERPRETATIONOF SPECIFIED LIMIT- ING VALUES. For the purpose of assessing com- pliance with this standard, the specified limiting values herein shall be interpreted in accordance
25、 with the rounding method described in AS 2706, i.e. the observed or calculated value shall be rounded to the same number of figures as in the specified limiting value and then compared with the specified limiting value. For example, for specified limiting values of 2.5, 2.50, and 2.500, the observe
26、d or calculated value would be rounded respectively to the nearest 0.1, 0.01, or 0.001. For examples of interpretation of specified values in accordance with the rounding method, see AS 2706, Appendix B. COPYRIGHT The Standard is downloaded from Standard Sharing 5AS 18811986 SECTION 2. ZINC ALLOY I
27、NGOTS FOR CASTING 2.1 CHEMICAL COMPOSITION. The chemical composition of the alloy ingot metal shall be in accordance with Table 2.1, as appropriate, and shall be verified analytically, except for zinc. NOTES: 1. Zinc used in the manufacture of the alloys should comply with grade Zn 99.99 of AS 1242.
28、 2. Aluminium used in the manufacture of the alloys should comply with AS 1874. 2.2 FREEDOM FROM DEFECTS.The ingots shall be free from harmful inclusions and other defects detrimental to their subsequent processing. 2.3 IDENTIFICATION. Eachingotshallbe distinctly marked to indicate its alloy designa
29、tion and the identity of the manufacturer. NOTES: 1. Ingots may be supplied unmarked (see Paragraph A1 of Appendix A). 2. Manufacturers who place the number of this Australian standard on zinc alloy ingots, packaging or literature related thereto, should ensure that the ingots are manufactured to co
30、mply with the standard. TABLE 2.1 CHEMICAL COMPOSITION OF INGOTS Element Zn Al 27 Cu 2Zn Al 11 Cu 1Zn Al 4 Cu 1Zn Al 4 min.max.min.max.min.max.min.max. Aluminium25.527.510.511.53.94.33.94.3 Copper2.02.50.61.10.751.250.03 Magnesium0.0150.0250.0150.030.040.060.040.06 Iron0.100.0750.050.05 Lead0.0040.0
31、040.0030.003 Cadmium0.0030.0030.0030.003 Tin0.0010.0010.0010.001 Silicon0.100.035 Indium0.00050.00050.00050.0005 Thallium0.0010.0010.0010.001 ZincREMREMREMREM NOTE: These specification limits do not preclude the possible presence of other unnamed elements. However, analysis should regularly be made
32、only for those elements listed in the Table, exceptzinc, which is determined by the difference between the sum of the elements analysed for and 100 percent. Analysis may be required and limits may need to be established for elements not specified (see Paragraph Al of Appendix A). COPYRIGHT AS 188119
33、866 SECTION 3. ZINC ALLOY CASTINGS 3.1 PROCESSOFMANUFACTURE. Castings shall be manufactured from one of the following: (a)Primary alloy ingot metal complying with the requirements of Section 2. (b) Clean gates, sprues, runners, overflow wells, and ascastrejectcastingsfreefrominserts, producedinthema
34、nufacturersownplant, provided that such material is obtained directly from castings which comply with Clause 3.2. (c)Metal derived from the remelting of castings with insertsandfinishes,whichhasbeen analysed and shown to comply with Clause 3.2. NOTE: If the composition of the melt does not conform t
35、o the limits of Clause 3.2, primary alloy, clean gates, sprues, runners, etc, may be added to bring the combined melt within specification. 3.2 CHEMICAL COMPOSITION. For all cast- ings, the chemical composition shall be in accordance with Table 3.1, as appropriate, and shall be verified analytically
36、, except for zinc. 3.3 CONDITION OF CASTINGS ON DELIVERY. Castings shall be supplied in the as-cast condition. NOTE: Dimensionally-stabilized castings may be supplied (see Paragraph A6 of Appendix A). 3.4 FREEDOM FROM DEFECTS. Castings shall be clean and free from undue porosity and other harmfuldef
37、ectsdetrimentalto theirsubsequent processing and end use. If required (see Paragraph A1 of Appendix A), assurance of freedom from harmful porosity and uniform density of castings shall be verified (see Paragraph A5.1 of Appendix A). Notwithstanding the fact that any casting has been passed as comply
38、ing with this standard, if faults in manufacture are revealed in subsequent processing of the casting, it may then be deemed not to comply. 3.5 MARKING. Castings shall be distinctly marked (see Paragraph A4.2 of Appendix A). NOTES: 1. Castings may be supplied unmarked (see Paragraph A1 of Appendix A
39、). 2. Manufacturers who place the number of this Australian stan- dard on zinc alloy castings, packaging or literature related thereto, should ensure that the castings are manufactured to comply with the standard. TABLE 3.1 CHEMICAL COMPOSITION OF CASTINGS Element Zn Al 27 Cu 2Zn Al 11 Cu 1Zn Al 4 C
40、u 1Zn Al 4 min.max.min.max.min.max.min.max. Aluminium25.028.010.012.03.54.33.54.3 Copper1.82.60.51.250.751.250.25 Magnesium0.010.0250.010.030.030.060.030.06 Iron0.120.10.100.10 Lead0.0050.0050.0050.005 Cadmium0.0040.0040.0050.005 Tin0.0020.0020.0020.002 Silicon0.0250.025 Indium0.00050.00050.00050.00
41、05 Thallium0.0010.0010.0010.001 Chromium0.020.020.020.02 Manganese0.050.050.050.05 Nickel0.020.020.020.02 ZincREMREMREMREM NOTE: These specification limits do not preclude the possible presence of unnamed elements. However, analysis should regularly be made only for those elements listed in the Tabl
42、e, exceptzinc, which is determined by difference between the sum of the elements analysed for and 100 percent. Analysis may be required and limits may need to be established for elements not specified (see Paragraph A1 of Appendix A). COPYRIGHT The Standard is downloaded from Standard Sharing 7AS 1
43、8811986 APPENDIX A PURCHASING GUIDELINES A1 INFORMATION TO BE SUPPLIED BY THE PURCHASER. A1.1 Zinc alloy ingots for casting. The purchaser should supply the following information at the time of enquiry and/or order, after making due reference to the explanation, advice and recommendations contained
44、in this Appendix: (a)Quantity (mass, in tonnes), and delivery instructions (dates, schedules, delivery point). (b) Designation of alloy (see Clause 1.4 and Preface). (c)Identification if required (see Paragraph A4.1). (d) Whether a test certificate is required (see Paragraph A8). NOTE: Any special o
45、r supplementary requirements of this standard are to be subject to agreement between the purchaser and the supplier at the time of enquiry and/or order, and stated on the order. A1.2 Zinc alloy castings. The purchaser should supply the following information at the time of enquiry and/or order, after
46、 making due reference to the explanation, advice and recommendations contained in this Appendix: (a)Quantity (mass, in tonnes, or number of pieces) and delivery instructions (dates, schedules, delivery point). (b) A drawing of the part (see Paragraph A2). (c)Designation of alloy (see Clause 1.4 and
47、Preface). (d) Casting tolerances (see Paragraph A3). (e)Whether dimensionally-stabilized castings are required (see Paragraph A6). (f)Whether a mass test is required (see Paragraph A5.1). (g) Identification if required (see Paragraph A4.2). (h) Whether it is the intention of the purchaser to inspect
48、 the castings at the manufacturers works (see Paragraph A7). (j)Whether a test certificate is required (see Paragraph A8). NOTE: Any special or supplementary requirements of this standard are to be subject to agreement between the purchaser and the supplier at the time of enquiry and/or order, and s
49、tated on the order, e.g. special finishing (electroplating, chromate passivation), special packaging or transportation, casting tolerances. A2 DRAWING AND/OR SAMPLE OF THE CASTING. The purchaser should provide a sample casting or detailed drawing or both. The drawing should show the following: (a)Name and part number. (b) Actual mass. (c)Important dimensions. (d) Dimensional tolerances (see Paragraph A3). (e)Surfaces to be machined and machin