AS-1625-1976.pdf
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1、AS 16251976 Australian Standard DENTAL WROUGHT GOLD ALLOYS Title allocated by Defence Cataloguing Authority: WROUGHT GOLD ALLOY, DENTAL The Dental Materials Committee of the Australian Dental Association has adopted this standardfor use in connection with its programmefor accreditation of certified
2、dental products, lists of which are published periodically. Enquiries regarding this programme should be addressed direct to the Australian Dental Association. When used in connection with the programme, the standard is known as Australian Dental Standard 1625 (ADS 1625). Accessed by UNIVERSITY OF S
3、OUTH AUSTRALIA on 31 Jul 2008 WITHDRAWN The following scientific, industrial and governmental organizations and departments were officially represented on the committee entrusted with the preparation of this standard: Australian Dental Association Australian Dental Schools and Hospitals Australian D
4、ental Standards Laboratory Australian Dental Trade Association Department of Defence Prosthetic Laboratories Association, Victoria Victorian Chamber of Manufactures This standard, prepared by Committee DN/3, Casting Alloys, was approved on behalf of the Council of the Standards Association of Austra
5、lia on 5 May 1976, and was published on 1 September 1976. Review of Australian 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 Stand
6、ards users ensure that they are in possession of the latest edition, and any 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 Austr
7、alian Standard, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards.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 inaccu
8、racy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken. PREFACE This standard was prepared under the authority of the Dental Materials and Equipment Standards Committee as a revision of AS T9-1956, Wrou
9、ght Golds for Dental Purposes, which it accordingly supersedes. It is one of a series intended for use in assessing the quality of dental goods used in Australia. The appendices have been revised to give more detail about the preparation of test specimens and to clarify the test procedures. Attentio
10、n is drawn to the fact that facilities for testing materials for compliance with this standard are available at the Australian Dental Standards Laboratory, 18 Lonsdale Street, Melbourne, Vic. 3000. This standard requires reference to the following standard: AS B128 Methods for the Verification of Te
11、sting Machines. First published (as AS T9) . . . . . . . . . . . . . . . .1956 Revised and issued as AS 1625 . . . . . . . . . . . . .1976 ISBN 0 7262 0967 8 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 WITHDRAWN 3AS 16251976 STANDARDS ASSOCIATION OF AUSTRALIA Australian Standard Specifi
12、cation for DENTAL WROUGHT GOLD ALLOYS 1SCOPE.This specification applies to wrought gold alloys, in the form of wire or strip, for prosthetic and orthodontic purposes. 2CLASSIFICATION.The alloys shall be classified as follows: Type A white gold; Type B yellow gold. 3SAMPLING.A separate sample at leas
13、t 1.25 m in length shall be taken from each batch. NOTE: The return of unused material and the residue of test specimens should be the subject of agreement with the testing laboratory. 4COMPOSITION.The combined content of gold and metals of the platinum group shall be not less than 75 percent by mas
14、s, and the nickel content shall not exceed 3 percent by mass. 5SIZE, SHAPE, AND COLOUR.The size, shape, and colour of the alloy shall be as specified by the purchaser. 6FUSION TEMPERATURE.When determined by the method described in Appendix A, the fusion temperature of the alloy shall be not less tha
15、n: 955C for Type A 920C for Type B. 7MECHANICAL PROPERTIES. 7.1Plastic Properties.When the alloy is tested by the method described in Appendix B, the amount of strain exhibited by the alloy shall be not more than 0.0085 mm/mm for Type A 0.0050 mm/mm for Type B. 7.2Tensile Strength.When the alloy is
16、tested by the method described in Appendix B, the tensile strength shall be not less than 1035 MPa for Type A 725 MPa for Type B. 7.3Elongation.When the alloy is tested by the method described in Appendix B, the elongation at fracture shall be not less than 4 percent for Type A and for Type B. Acces
17、sed by UNIVERSITY OF SOUTH AUSTRALIA on 31 Jul 2008 WITHDRAWN AS 162519764 7.4Retests.If an original specimen selected fails to meet the requirements of Clauses 7.1, 7.2 and 7.3, two further test specimens representing the same batch shall be tested. If both specimens comply with the requirements, t
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