1、BRITISH STANDARD BS ISO 23079:2005 Magnesium and magnesium alloys Returns Requirements, classification and acceptance ICS 77.120.20 BS ISO 23079:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2005 BSI 31 March 2005 ISBN 0 580 4
2、5707 9 National foreword This British Standard reproduces verbatim ISO 23079:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys, which has the responsibility to: A list of organization
3、s represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or
4、by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immu
5、nity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them
6、 in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title pages, pages ii and iii, a blank page, pages 1 to 6, an inside back cover and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued. Amendme
7、nts issued since publication Amd. No. Date Comments Reference number ISO 23079:2005(E)INTERNATIONAL STANDARD ISO 23079 First edition 2005-03-01 Magnesium and magnesium alloys Returns Requirements, classification and acceptance Magnsium et alliages de magnsium Retours Exigences, classification et acc
8、eptation BSISO23079:2005IS:97032 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb ynted iv roweb detu slahl ton ide ebtlnu deess the typefaces whice era hml era deddebicsnede to i dnanstlaled t noeh computfrep reormi
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11、teiraat ta the serddaig sleb nevwo. ISO 5002 All irthgs erse.devr lnUeto sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm, wittuoh repmissii non writign from ietI rehSa Ot tsserd
12、da eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dnaii BSISO23079:2005 iiiForeword ISO (the International Organization
13、 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 subject for which a technical committee has been established has
14、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 Commission (IEC) on all matters of electrotechnical standardization. Intern
15、ational 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 committees are circulated to the member bodies for voting. Publicati
16、on 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 not be held responsible for identifying any or all such patent right
17、s. ISO 23079 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 5, Magnesium and alloys of cast or wrought magnesium. BSISO23079:2005INTENRATIONAL TSANDADR IS:97032 O5002(E)1Magnesium and magnesium alloys Returns Requirements, classification and acceptance
18、1 Scope This International Standard specifies general requirements, classification and acceptance for the different classes of magnesium returns. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 coating any surface layer except a natural oxide
19、 layer EXAMPLES Oil, paint, metal coating. 2.2 contaminant physical or chemical component of magnesium returns which, if not properly monitored and managed, negatively affects the quality of the returns as a raw material for certain applications or shows hazardous properties during certain operation
20、s 2.3 insert component consisting of metal or other materials which may be moulded into position or put into a finished product or article EXAMPLES Bearing, screw thread insert. 2.4 returns, pl raw material, destined for trade and industry, mainly consisting of magnesium and/or magnesium alloys, res
21、ulting from the collection or recovery of metal that arises at various stages of fabrication, or products after use, to be used for the production of wrought or cast alloys and for other production processes 2.5 turnings, pl returns consisting of grains, chips, curls, flakes, etc. resulting from mac
22、hining or other operations BSISO23079:20052 3 Ordering information The ordering information shall define the magnesium returns and should cover aspects such as the following, in order to achieve a transparent transaction: the number of this International Standard (ISO 23079); recycling classes, with
23、 reference to the relevant subclause of this International Standard (see Clause 5 and Annex A); condition of the returns, e.g. moisture and any contamination with other materials, size, physical characteristics of pieces or particles, whenever meaningful and if not covered by class definition (see C
24、lause 7); gross mass; information about the origin of the returns; condition in which the returns shall be delivered (loose, baled, etc.); required chemical composition, if not otherwise specified; certification and control documents; shipment documents required by law; other requirement as agreed.
25、4 General requirements 4.1 General Relevant characteristics of magnesium returns not specified in this International Standard shall be subject to agreement between the purchaser and the supplier. If returns might contain any hazardous contaminants, the purchaser shall be notified and his agreement t
26、o receive the returns shall be obtained before shipment. 4.2 Condition of returns If not otherwise agreed or specified, the returns shall be supplied as bulk returns. The returns shall be correctly packed and labelled to ensure safe transportation. 4.3 Foreign materials If not otherwise specified, t
27、he returns shall be free from foreign material, e.g. aluminium-based material. 4.4 Mass tolerances If not otherwise agreed, the difference between the consigned quantity and the ordered quantity shall not exceed 5 %. 4.5 Chemical composition Returns classified by one alloy shall meet the requirement
28、s of chemical composition for that alloy. Returns classified by two or more alloys shall meet the chemical composition agreed between purchaser and the supplier. BSISO23079:2005 35 Recycling classification (see also Annex A) 5.1 Solid returns with no inserts, no coating 5.1.1 Classified by one alloy
29、 a) Returns with low surface area and thickness W 1 mm EXAMPLES Rejected parts, biscuits and runners. b) Returns with high surface area and thickness 1 mm EXAMPLES Flashes, thin castings. 5.1.2 Classified by two or more alloys a) Returns with low surface area and thickness W 1 mm EXAMPLES Rejected p
30、arts, biscuits and runners. b) Returns with high surface area and thickness 1 mm EXAMPLES Flashes, thin castings. 5.2 Solid returns with inserts, no coating 5.2.1 Classified by one alloy (types of insert shall be specified if relevant) a) Returns with low surface area and thickness W 1 mm EXAMPLES R
31、ejected parts, biscuits and runners. b) Returns with high surface area and thickness 1 mm EXAMPLES Flashes, thin castings. 5.2.2 Classified by two or more alloys (types of insert shall be specified if relevant) a) Returns with low surface area and thickness W 1 mm EXAMPLES Rejected parts, biscuits a
32、nd runners. b) Returns with high surface area and thickness 1 mm EXAMPLES Flashes, thin castings. 5.3 Solid returns with coating 5.3.1 Classified by one alloy (types of coating and insert shall be specified if relevant) a) Without inserts b) With insoluble inserts c) With soluble inserts BSISO23079:
33、20054 5.3.2 Classified by two or more alloys (types of coating and insert shall be specified if relevant) a) Without inserts b) With insoluble inserts c) With soluble inserts 5.4 Post-consumer returns 5.4.1 Classified by one alloy To be further specified if necessary with regard to inserts, coatings
34、, surface contaminants, etc. 5.4.2 Classified by two or more alloys To be further specified if necessary with regard to inserts, coatings, surface contaminants, etc. 5.5 Turnings The following characteristics shall be specified: type of alloy; foreign material content (non-magnesium based alloys); w
35、et, oily or dry; condition (compacted, non-compacted); maximum dust content. 5.6 Residues, dross, sludge, etc. 5.6.1 Without salt 5.6.2 With salt 6 Sampling and testing Sampling and testing shall be agreed upon between purchaser and supplier. 7 Acceptance procedure All magnesium returns delivered ag
36、ainst a specific order shall be accepted with reservation until the classification at the purchasers premises is accomplished. Any observation on the incoming shipment which indicates a non-compliance shall be notified by the purchaser as soon as possible. The classification shall include: the contr
37、ol of the arrival date and times of the delivery; the control of mass; visual inspection during unloading. BSISO23079:2005 5The classification may include: the determination of moisture; the determination of total volatile substances; the determination of foreign material; the determination of the c
38、hemical composition. 8 Treatment of non-conformities Deliveries of returns in dispute, for either quantity or quality, shall be kept at the disposal of the supplier for an agreed period, unless different agreements between supplier and purchaser are made. BSISO23079:20056 Annex A (informative) Recyc
39、ling classes for magnesium and magnesium alloys Table A.1 Recycling classes/subclause reference for magnesium and magnesium alloys Description of returns Solid returns with no inserts, no coating Solid returns with inserts, no coating Solid returns with coating Post- consumer returns Turnings Residu
40、es, dross, sludge ,etc. Returns with low surface area and thicknesses W 1 mm 5.1.1 a) 5.2.1 a) Returns with high surface area and thicknesses 1 mm 5.1.1 b) 5.2.1 b) Without inserts 5.3.1 a) With inserts 5.3.1 b), 5.3.1 c) Classified by one alloy Shall be further specified if relevant 5.4.1 Returns w
41、ith low surface area and thicknesses W 1 mm 5.1.2 a) 5.2.2 a) Returns with high surface area and thicknesses 1 mm 5.1.2 b) 5.2.2 b) Without inserts 5.3.2 a) With inserts 5.3.2 b), 5.3.2 c) Classified by two or more alloys Shall be further specified if relevant 5.4.2 Shall be further specified 5.5 Wi
42、thout salt 5.6.1 With salt 5.6.2 BSISO23079:2005BS ISO 23079:2005 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level
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