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 there
2、from, 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 2007 SAE International All rights reserved. No part of this publication m
3、ay 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 AS81021 REV. A AEROSPACE STANDARD Issued 2002-02 Revised 2007-11 Superseding AS81021 Copper-Beryllium Alloy (Copper Alloy Numbers C17500 and C17510), Strip RATIONALE AS81021A results from a Five Year Review and updat
5、e of this specification. 1. SCOPE 1.1 Scope This specification covers the requirements for the acquisition of two alloys of copper-beryllium alloy strip, having higher electrical conductivity than copper-beryllium alloy strip normally used (see 6.1). All sizes of strip are covered by this specificat
6、ion. 1.2 Tempers Copper alloy numbers C17500 and C17510 strip shall be furnished flat or coiled in the following tempers, as specified in 6.2: A - Cold rolled and solution heat treated (also designated TB00). 1/2H - Hot or cold rolled, solution heat treated, and cold rolled half-hard (also designate
7、d TD02). H - Hot or cold rolled, solution heat treated, and cold rolled full-hard (also designated TD04). AT - Temper A followed by precipitation hardening (also designated TF00). 1/2HT - Temper 1/2H followed by precipitation hardening (also designated TH02). HT - Temper H followed by precipitation
8、hardening (also designated TH04). 2. APPLICABLE DOCUMENTS The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase orde
9、r. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Copyright SAE International Provided by
10、IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 2 - 2.1 SAE Publications Available from SAE, International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-49
11、70 (outside USA), www.sae.org. AMS 2222 Tolerances, Copper and Copper Alloy Sheet, Strip and Plate AMS-H-7199 Heat Treatment of Wrought Copper-Beryllium Alloys, Process For (Copper Alloys: Numbers C17000, C17200, C17300, C17500, and C17510) AMS-STD-185 Identification Marking of Copper and Copper Bas
12、e Alloy Mill Products 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 193 Test Methods for Resistivity of Electrical Conductor Materials ASTM B 194 Copper-Beryllium Alloy Plate, S
13、heet, Strip and Rolled Bar ASTM B 194 Annex - Chemical Analysis of Copper-Beryllium Alloys ASTM D 3951 Packaging, Commercial ASTM E 8 Tension Testing of Metallic Materials ASTM E 18 Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials ASTM E 478 Chemical Analysi
14、s of Copper Alloys 2.3 U.S. Government Documents Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094 or www.dodssp.daps.mil. MIL-C-3993 Copper and Copper Base Alloy Mill Products, Packaging of MIL-STD-129 Marking for Shipment and Storage 3.
15、 REQUIREMENTS 3.1 Chemical Composition The chemical composition of the alloys shall conform to the requirements shown in Table 1. These specification limits do not preclude the presence of other elements. Limits may be established by agreement between material manufacturer or supplier and purchaser
16、for these unnamed elements. Copper is customarily given as remainder, but may be taken as the difference between the sum of all elements analyzed and 100%. When all the elements in the table are analyzed, their sum shall be 99.5% minimum. Copyright SAE International Provided by IHS under license wit
17、h SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 3 - TABLE 1 - CHEMICAL REQUIREMENTS 3.1.1 An analysis of each lot of strip shall be furnished by the material supplier. The analysis shall be certified by the supplier when a check analys
18、is is not specified in the procurement document (see 6.2). 3.2 Mechanical Properties The mechanical properties of the strip, as supplied, shall conform to the requirements of 3.2.1 and 3.2.2. Tensile requirements, unless otherwise specified in the contract or order (see 6.2), shall be waived for thi
19、ckness greater than 0.015 in provided the strip meets the hardness requirements; for strip 0.015 in or less in thickness, the tensile requirements are mandatory. In cases of dispute, tension tests shall be the basis of acceptance. 3.2.1 Heat Treatable Strip Heat treatable strip supplied in A, 1/2H,
20、and H tempers shall conform to the mechanical properties listed in Table 2. Such strip, when precipitation hardened in accordance with the prescribed minimum heat treating requirements of AMS-H-7199, shall be capable of developing mechanical properties conforming to tempers AT, 1/2HT, and HT listed
21、in Table 3. 3.2.2 Heat Treated-mill Supplied Strip Heat-treated-mill supplied strip shall conform to the specified mechanical properties of tempers AT, 1/2HT, and HT listed in Table 2. 3.3 Electrical Resistivity The electrical resistivity of the strip for all sizes and tempers shall conform to the r
22、equirements of Table 3. 3.4 Dimensional Tolerances Shall conform to AMS 2222 as applicable to refractory alloys. 3.4.1 Coiled Lengths When coiled strip is specified (see 6.2), coils shall consist of not more than three pieces, each of which shall be over 10 ft in length. 3.4.2 Flatness Cut lengths a
23、nd coiled strip shall be commercially flat so as not to interfere with normal stamping and forming operations. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 4 - TABLE 2 - M
24、ECHANICAL PROPERTIES, ALLOY NUMBERS C17500 AND C17510 TABLE 3 - ELECTRICAL RESISTIVITY, ALLOY NUMBERS C17500 AND C17510 3.5 Identification Marking When specified in the procurement document, identification marking shall be in accordance with AMS-STD-185 (see 6.2). 3.6 Workmanship The strip shall be
25、uniform in quality and condition. The surfaces shall be free from scale, cracks, scratches, seams, laps or folds, slivers, burrs, and imbedded foreign matter so as to impair neither the usability nor affect the electrical conductivity of the strip for the intended applications. Copyright SAE Interna
26、tional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 5 - 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Unless otherwise specified in the contract or purchase order, the material su
27、pplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless d
28、isapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Lot A lot shall consist of all strip of the same size,
29、temper, and melt, submitted for inspection and acceptance at one time. 4.3 Sampling 4.3.1 Chemical Test From each lot, four individual lengths or units shall be selected at random to provide a composite sample of a minimum of 50 g. If the lot consists of less than four lengths or units, a composite
30、sample shall be prepared from a piece taken from each length or unit (see 4.5.1). 4.3.1.1 Check Analysis When specified (see 6.2), sampling preparation shall be performed in accordance with 4.3.1 so as to provide three composite samples of 50 g each: one for the manufacturer or vendor, one for the p
31、rocuring activity and one for a referee, if necessary. 4.3.2 Mechanical Properties 4.3.2.1 Tension Test For heat treated strip, a total of three tensile test samples, each 8 in long by 3/4 in wide, shall be taken either longitudinally or transversely to the direction of rolling from three individual
32、 lengths or units selected at random from the lot. If the lot consists of less than three lengths or units, a sample shall be taken from each length or unit. For heat treatable strip, six samples shall be taken (see 4.5.2.1). 4.3.2.2 Hardness Test For heat treated strip, a total of three specimens,
33、each 2 to 3 in long, shall be taken from three individual lengths or units selected at random from the lot. If the lot consists of less than three lengths or units, a sample shall be taken from each length or unit. For heat treatable strip, six samples shall be taken (see 4.5.2.2). 4.3.3 Electrical
34、Resistivity A total of three samples, each 15 in long by 1 in wide, shall be taken either longitudinally or transversely to the direction of rolling from three individual lengths or units selected at random from the lot. If the lot consists of less than three lengths or units, a sample shall be take
35、n from each length or unit (see 4.5.3). 4.3.4 Visual and Dimensional Examination From each lot, seven cut lengths or coils shall be selected. Ten percent of each of these seven lengths or coils shall be used as the sample for visual and dimensional examination. Copyright SAE International Provided b
36、y IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 6 - 4.4 Examination 4.4.1 Visual and Dimensional Examination Strips selected in accordance with 4.3.4 shall be visually examined to determine compliance with 3.5 an
37、d dimensionally examined to determine conformance to dimensional requirements of 3.4. 4.4.2 Preparation for Delivery The entire lot shall be visually examined to assure compliance with the packaging requirements of Section 5 of this specification. 4.5 Tests 4.5.1 Chemical Analysis The analysis furni
38、shed by the manufacturer or vendor from the sample taken in 4.3.1 for the lot can be accepted as defining the composition of the material. This analysis shall conform to the requirements of 3.1 when determined by wet chemical methods in accordance with ASTM B 194 and/or ASTM E 478, by spectrochemica
39、l methods, or by other analytical methods acceptable to the purchaser. 4.5.1.1 Check Analysis The chemical analysis, as determined from the sample obtained in 4.3.1.1 for the lot, shall conform to the requirements of 3.1 when checked in accordance with the procedures of 4.5.1. 4.5.2 Mechanical Prope
40、rties Tests 4.5.2.1 Tension Test Samples selected in accordance with 4.3.2.1 shall be tested in accordance with the requirements of ASTM E 8 using standard sheet type rectangular test specimens, to assure conformance of heat treated lots to the tensile requirements of 3.2.2 and of heat treatable lot
41、s to the tensile requirements and precipitation hardening response of 3.2.1. 4.5.2.2 Hardness Test Specimens selected in accordance with 4.3.2.2 shall be tested in accordance with the requirements of ASTM E 18 to assure conformance of heat treated lots to the hardness requirements of 3.2.2 and of he
42、at treatable lots to the hardness requirements and precipitation hardening response of 3.2.1. 4.5.3 Electrical Resistivity Samples selected in accordance with 4.3.3 shall be tested for electrical resistivity in accordance with the requirements of ASTM B 193 to assure conformance of the lot to the re
43、quirements of 3.3. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS81021 Revision A - 7 - 4.6 Rejection 4.6.1 Examination Defects Material not conforming to this specification, or to authorized
44、 modifications, will be subject to rejection. 4.6.2 Test Failures A lot shall be rejected for failure to meet any of the test requirements when tested in accordance with 4.5, subject to the retest provisions of 4.6.2.1. 4.6.2.1 Resampling and Retesting If any specimen used in the above tests fails t
45、o meet the specified requirements, disposition of the product may be based on the results of testing two additional specimens for each nonconforming specimen. Failure of any retest specimen to meet the specified requirements shall be cause for rejection of the product represented. Results of all tes
46、ts shall be reported. 5. PACKAGING 5.1 Preservation The levels of preservation shall be level A or Industrial as specified (see 6.2). 5.1.1 Level A Level A preservation shall be in accordance with MIL-C-3993. 5.1.2 Industrial Industrial preservation shall be in accordance with ASTM D 3951. 5.2 Packi
47、ng The levels of packing shall be level A, B or Industrial as specified (see 6.2). 5.2.1 Levels A and B Levels A and B shall be in accordance with MIL-C-3993. 5.2.2 Industrial Industrial packing shall be in accordance with ASTM D 3951. 5.3 Marking In addition to any special marking required (see 6.2
48、), marking for shipment shall be in accordance with MIL-STD-129. 6. NOTES 6.1 Intended Use Strip material procured by this specification is intended primarily for usage as the contact elements of electrical switches where conductivity requirements are higher than can be met by standard grades of copper-beryllium strip. The material should be used only in the precipitation hardened tempers in the finished part in order to take advantage of the higher mechanical properties (see 6.3) and higher conductivity. Copyright SAE International Provided by IHS under license with S
