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1、 SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AMS 2280B AEROSPACE MATERIAL SPECIFICATION Issued JUN 1975 Reaffirmed SEP 2000 Revised SEP 2006 Superseding AMS 2280A Trace Element Control Nickel Alloy Castings RATIONALE AMS 2280B is a Five Year Review and update of
5、 this specification. 1. SCOPE 1.1 Purpose This specification establishes maximum permissible limits for trace elements in nickel alloy castings. 1.2 Application These products have been used typically for limited use to achieve premium-quality material for highly-stressed rotating parts, such as tur
6、bine blades, where control of trace elements is required to maintain elevated-temperature tensile, stress- rupture, creep, and low-cycle fatigue properties, but usage is not limited to such applications. 1.2.1 It is intended that this specification be invoked only for selected applications by stipul
7、ation on drawings, purchase orders, or other documentation supplementing the material specification or in material specifications. 1.3 Classification This specification covers two classes of trace element control, defined by the elements to be controlled as follows: Class 1 - Lead, Bismuth, Selenium
8、, Tellurium, and Thallium Class 2 - Lead, Bismuth, Selenium, Tellurium, Thallium, and Others (See 3.1.2) Class 3 - Cancelled, use Class 1 Class 4 - Cancelled, use Class 2 1.3.1 When trace element control is required, the elements to be controlled shall be indicated by this specification number and a
9、 suffix number indicating the class. For example, AMS 2280-1 indicates that control of lead, bismuth, selenium, tellurium, and thallium is required. If no class is indicated, Class 1 shall apply. SAE AMS 2280B - 2 - 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date o
10、f the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been cancelled and no superseding document has been specified, the last
11、 published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), or www.sae.org. ARP1313 Determination of Trace Elements in High-Temperatur
12、e Alloys 3. TECHNICAL REQUIREMENTS 3.1 When this specification is invoked, the elements for which control is required shall not exceed the limits shown in Table 1, as applicable to the class specified. These requirements supplement those of the applicable material specification. No check analysis li
13、mits apply to these elements. 3.1.1 Both Classes TABLE 1 - TRACE ELEMENT CONTROL Element Max Limit Percent Max Limit ppm Lead 0.0005 5 Bismuth 0.00005 0.5 Selenium 0.0003 3 Tellurium 0.00005 0.5 Thallium 0.0005 5 3.1.2 Class 2 When this class is specified, the following additional elements shall not
14、 exceed 0.0050% (50 ppm) each and the total of all these elements shall not exceed 0.0400% (400 ppm): Antimony Gold Sodium Arsenic Indium Thorium Cadmium Mercury Tin Gallium Potassium Uranium Germanium Silver Zinc 3.2 Analytical Procedures Determination of conformance to 3.1.1 and 3.1.2 shall be in
15、accordance with ARP1313, methods listed in 3.2.1, or by other analytical methods acceptable to purchaser. 3.2.1 The following methods, not detailed in ARP1313, may also be considered acceptable; these procedures are not listed in any order of preference: Emission spectrography by other techniques Ma
16、ss spectrography techniques Polarographic techniques Ultraviolet or visible spectrophotometry SAE AMS 2280B - 3 - 4. QUALITY ASSURANCE PROVISIONS Shall be as specified in the applicable material specification and as follows: 4.1 Reports The report of composition required by the material specificatio
17、n shall also include the actual amounts found for each trace element required to be determined by the class specified. 4.2 Approval The method to be used for determination of each trace element in each alloy shall be established by agreement between purchaser and vendor. Once established, no change
18、in analytical technique or detailed procedure shall be made without reapproval by purchaser. 5. PREPARATION FOR DELIVERY Not applicable. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders. 7. REJECTIONS
19、Product not conforming to this specification, or to modifications authorized by purchaser, shall be subject to rejection. 8. NOTES 8.1 A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to
20、the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revisions. Change bars and (R) are not used in original publications, nor in specifications that contain editorial changes only. 8.2 Trace
21、 elements, control of which is specified in 3.1.1 and 3.1.2, have been found to drastically reduce mechanical properties such as elevated-temperature tensile, stress-rupture, creep, and low-cycle fatigue. 8.3 The limits on trace elements specified in 3.1.1 approach the limit of detection. The import
22、ance of agreement on all details of methods of producing the required comparison standards and of procedures for determining the content of each element cannot be overemphasized. 8.4 Terms used in AMS are clarified in ARP1917 and as follows: 8.4.1 “Trace Element“ The term “trace element“ means any e
23、lement occurring in a nickel alloy system that was not intentionally added as an alloying addition and which may have a deleterious effect on mechanical properties. 8.5 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are primary; dimensions and properties in SI units and the Celsius temperatures are shown as the approximate equivalents of the primary units and are presented only for information. PREPARED BY AMS COMMITTEE “F“ -,-,-