SAE AS 81021B-2016 Copper-Beryllium Alloy (Copper Alloy Numbers C17500 and C17510) Strip.pdf

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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2016 SAE InternationalAll rights reserved. No part of this publi

3、cation may 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: +1 724-776-4970 (out

4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AS81021BAEROSPACESTANDARDAS81021 REV. BIssued 2002-02Revised 2016-05Superseding AS81021ACoppe

5、r-Beryllium Alloy(Copper Alloy Numbers C17500 and C17510), StripRATIONALEAS81021B results from a Limited Scope Ballot to correct an error in the minimum tensile strength in the HT condition (Table 2).NOTICEThe initial SAE publication of this document was taken directly from U.S. Military Standard MI

6、L-C-81021A, Notice 1. This SAE Standard may retain the same part numbers established by the original military document.Any requirements associated with Qualified Products Lists (QPLs) may continue to be mandatory for DoD contracts. Requirements relating to QPLs have not been adopted by the SAE for t

7、his standard and are not part of this SAE document.1. SCOPE1.1 ScopeThis 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 co

8、vered by this specification.1.2 TempersCopper 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-

9、hard (also designated 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 b

10、y precipitation hardening (also designated TH04).SAE INTERNATIONAL AS81021B Page 2 of 82. APPLICABLE DOCUMENTSThe 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

11、the issue in effect on the date of the purchase order. In theevent 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

12、 obtained.2.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.AMS2222 Tolerances, Copper and Copper Alloy Sheet, Strip, and PlateAMS-H-7199 Heat Treatment of W

13、rought Copper-Beryllium Alloys, Process for (Copper Alloys: Numbers C17000, C17200, C17300, C17500, and C17510)AMS-STD-185 Identification Marking of Copper and Copper Base Alloy Mill Products2.2 ASTM PublicationsAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohock

14、en, PA 19428-2959, Tel: 610-832-9585, www.astm.org.ASTM B193 Resistivity of Electrical Conductor MaterialsASTM B194 Copper-Beryllium Alloy Plate, Sheet, Strip and Rolled BarASTM B194 Annex - Chemical Analysis of Copper-Beryllium AlloysASTM B534 Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Berylli

15、um Alloy Plate, Sheet, Strip, and Rolled BarASTM D3951 Packaging, CommercialASTM E8 Tension Testing of Metallic MaterialsASTM E18 Rockwell Hardness and Rockwell Superficial Hardness of Metallic MaterialsASTM E478 Chemical Analysis of Copper Alloys2.3 U.S. Government DocumentsCopies of these document

16、s are available online at http:/quicksearch.dla.mil.MIL-C-3993 Copper and Copper Base Alloy Mill Products, Packaging ofMIL-STD-129 Marking for Shipment and Storage3. REQUIREMENTS3.1 Chemical CompositionThe chemical composition of the alloys shall conform to the requirements shown in Table 1. These s

17、pecification limits do not preclude the presence of other elements. Limits may be established by agreement between material manufacturer or supplier and purchaser for these unnamed elements. Copper is customarily given as remainder, but may be taken as the difference between the sum of all elements

18、analyzed and 100%. When all the elements in the table are analyzed, their sum shall be 99.5% minimum.SAE INTERNATIONAL AS81021B Page 3 of 8Table 1 - Chemical requirements3.1.1 An analysis of each lot of strip shall be furnished by the material supplier. The analysis shall be certified by the supplie

19、r when a check analysis is not specified in the procurement document (see 6.2).3.2 Mechanical PropertiesThe 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), shal

20、l be waived for thickness greater than 0.015inch provided the strip meets the hardness requirements; for strip 0.015 inch 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 StripHeat treatable strip s

21、upplied in A, 1/2H, 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

22、/2HT, and HT listed in Table 3.3.2.2 Heat-Treated Mill-Supplied StripHeat-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 ResistivityThe electrical resistivity of the strip for all sizes and tempers shall

23、conform to the requirements of Table 3.3.4 Dimensional TolerancesShall conform to AMS2222 as applicable to refractory alloys.3.4.1 Coiled LengthsWhen coiled strip is specified (see 6.2), coils shall consist of not more than three pieces, each of which shall be over 10 feetin length. 3.4.2 FlatnessCu

24、t lengths and coiled strip shall be commercially flat so as not to interfere with normal stamping and forming operations.SAE INTERNATIONAL AS81021B Page 4 of 8Table 2 - Mechanical properties, alloy numbers C17500 and C17510TemperTensile Strength,psiYield Strength,0.2%, psiElongationin 2 inches, %1/R

25、ockwell Hardness2/B Scale3/30T ScaleA 55000 max 20 - 30000 20 - 35 20 - 45 29 - 461/2H 60 - 75000 50 - 70000 5 - 10 65 - 76 60 - 68H 70 - 85000 55 - 80000 2 - 8 78 - 88 69 - 75AT 100 - 120000 80 - 100000 8 - 15 92 min 77 - 821/2HT 110 - 130000 95 - 120000 5 - 12 95 min 79 - 83HT 110 - 130000 100 - 1

26、20000 5 - 12 95 min 79 - 831/ Hardness requirements are applicable subject to the conditions of 3.2.2/ Values are applicable to strip not less than 0.032 inch thick.3/ Values are applicable to strip not less than 0.016 inch thick.Table 3 - Electrical resistivity, alloy numbers C17500 and C175103.5 I

27、dentification MarkingWhen specified in the procurement document, identification marking shall be in accordance with AMS-STD-185 (see 6.2).3.6 WorkmanshipThe strip shall be uniform in quality and condition. The surfaces shall be free from scale, cracks, scratches, seams, laps or folds, slivers, burrs

28、, and imbedded foreign matter so as to impair neither the usability nor affect the electrical conductivity of the strip for the intended applications.4. QUALITY ASSURANCE PROVISIONS4.1 Responsibility for InspectionUnless otherwise specified in the contract or purchase order, the material supplier is

29、 responsible for the performance of allinspection 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 disapproved

30、 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.SAE INTERNATIONAL AS81021B Page 5 of 84.2 LotA lot shall consist of al

31、l strip of the same size, temper, and melt, submitted for inspection and acceptance at one time.4.3 Sampling4.3.1 Chemical TestFrom 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

32、 or units, a composite sample shall be prepared from a piece taken from each length or unit (see 4.5.1).4.3.1.1 Check AnalysisWhen 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

33、vendor, one for the procuring activity and one for a referee, if necessary.4.3.2 Mechanical Properties4.3.2.1 Tension TestFor heat treated strip, a total of three tensile test samples, each 8 inches long by 3/4 inch wide, shall be taken either longitudinally or transversely to the direction of rolli

34、ng 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 treatablestrip, six samples shall be taken (see 4.5.2.1). 4.3.2.2 Hardness TestFor heat treated strip, a tota

35、l of three specimens, each 2 to 3 inches 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

36、.5.2.2).4.3.3 Electrical ResistivityA total of three samples, each 15 inches long by 1 inch 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

37、 units, a sample shall be taken from each length or unit (see 4.5.3).4.3.4 Visual and Dimensional ExaminationFrom each lot, seven cut lengths or coils shall be selected. 10% of each of these seven lengths or coils shall be used as the sample for visual and dimensional examination.4.4 Examination4.4.

38、1 Visual and Dimensional ExaminationStrips selected in accordance with 4.3.4 shall be visually examined to determine compliance with 3.5 and dimensionally examined to determine conformance to dimensional requirements of 3.4.4.4.2 Preparation for DeliveryThe entire lot shall be visually examined to a

39、ssure compliance with the packaging requirements of Section 5 of this specification.SAE INTERNATIONAL AS81021B Page 6 of 84.5 Tests4.5.1 Chemical AnalysisThe analysis furnished 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

40、 material. This analysis shall conform to the requirements of 3.1 when determined by wet chemical methods in accordance with ASTM B194 and/or ASTM E478, by spectrochemical methods, or by other analytical methods acceptable to the purchaser.4.5.1.1 Check AnalysisThe chemical analysis, as determined f

41、rom 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 Properties Tests4.5.2.1 Tension TestSamples selected in accordance with 4.3.2.1 shall be tested in accordance with the requirements of AST

42、M E8 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 lots to the tensile requirements and precipitation hardening response of 3.2.1.4.5.2.2 Hardness TestSpecimens selected in accordance with 4

43、.3.2.2 shall be tested in accordance with the requirements of ASTM E18 to assure conformance of heat treated lots to the hardness requirements of 3.2.2 and of heat treatable lots to the hardness requirements and precipitation hardening response of 3.2.1.4.5.3 Electrical ResistivitySamples selected i

44、n accordance with 4.3.3 shall be tested for electrical resistivity in accordance with the requirements of ASTM B193 to assure conformance of the lot to the requirements of 3.3.4.6 Rejection4.6.1 Examination DefectsMaterial not conforming to this specification, or to authorized modifications, will be

45、 subject to rejection.4.6.2 Test FailuresA 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 RetestingIf any specimen used in the above tests fails to meet the specified requir

46、ements, 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 tests shall be reported.5. PAC

47、KAGING5.1 PreservationThe levels of preservation shall be level A or Industrial as specified (see 6.2).SAE INTERNATIONAL AS81021B Page 7 of 85.1.1 Level ALevel A preservation shall be in accordance with MIL-C-3993.5.1.2 IndustrialIndustrial preservation shall be in accordance with ASTM D3951.5.2 Pac

48、kingThe levels of packing shall be level A, B or Industrial as specified (see 6.2).5.2.1 Levels A and BLevels A and B shall be in accordance with MIL-C-3993.5.2.2 IndustrialIndustrial packing shall be in accordance with ASTM D3951.5.3 MarkingIn addition to any special marking required (see 6.2), mar

49、king for shipment shall be in accordance with MIL-STD-129.6. NOTES6.1 Intended UseStrip 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 hi