ASTM B961-2008 Standard Specification for Silver Coated Copper and Copper Alloy Stranded Conductors for Electronic Space Application《镀银铜及铜合金绞线的电子器件空间应用的标准规范》.pdf

《ASTM B961-2008 Standard Specification for Silver Coated Copper and Copper Alloy Stranded Conductors for Electronic Space Application《镀银铜及铜合金绞线的电子器件空间应用的标准规范》.pdf》由会员分享，可在线阅读，更多相关《ASTM B961-2008 Standard Specification for Silver Coated Copper and Copper Alloy Stranded Conductors for Electronic Space Application《镀银铜及铜合金绞线的电子器件空间应用的标准规范》.pdf（8页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: B 961 08Standard Specification forSilver Coated Copper and Copper Alloy StrandedConductors for Electronic Space Application1This standard is issued under the fixed designation B 961; the number immediately following the designation indicates the year oforiginal adoption or, in the case

2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers uninsulated silver-coated softor annealed copper and copper alloy s

3、tranded conductors foruse in electronic space application.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalu

4、es from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine th

5、e applica-bility of regulatory limitations prior to use. This precautionarycaveat pertains only to Section 9.2. Referenced Documents2.1 ASTM Standards:2NOTE 1The following documents of the issue in effect on date ofmaterial purchase form a part of this specification to the extent referencedherein.B

6、193 Test Method for Resistivity of Electrical ConductorMaterialsB 258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Usedas Electrical ConductorsB 298 Specification for Silver-Coated Soft or AnnealedCopper WireB 286 Specification for Copper Conductors f

7、or Use inHookup Wire for Electronic EquipmentB 624 Specification for High-Strength, High-ConductivityCopper-Alloy Wire for Electronic ApplicationE3 Guide for Preparation of Metallographic Specimens2.2 European Space Agency (ESA):3ESA/SCC 3901 Generic Specification No. 39012.3 European Cooperation fo

8、r Space Standardization(ECSS):3ECSS-Q-70-20A Determination of the Susceptibility of Sil-ver Plated Copper wire and Cable to “Red Plague”Corrosion3. Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Quantity of each size.3.1.2 Customer s

9、pecification requirements including con-ductor size, designation, and construction.3.1.3 Whether silver-coated copper or silver-coated copper-alloy.3.1.4 Package size (Section 12).3.1.5 Special package marking if required (Section 11), and3.1.6 Place of inspection (Section 10).4. Coating of Wires4.1

10、 Coating ThicknessThe silver coating of wires com-posing stranded conductors shall be uniform such that no areaaround the strand circumference is covered by less than 80micro-inches of silver. Uniform silver coating shall be verifiedby micro-sectioning as outlined in section 9.1.4.1.1 Single points

11、caused by eccentric strands or minutescratches shall not be less than 60 micro-inches minimum orexceed 3 points in number around the micro-sectioned strandcircumference.4.2 The silver coating of wires composing stranded conduc-tors (before and after stranding) shall conform to the polysul-fide test

12、in accordance with Specification B 298.4.3 The average silver coating thickness of wires composingstranded conductors shall be verified by electronic determina-tion (Method A) in accordance with Specification B 298.1This test method is under the jurisdiction of ASTM Committee B01 onElectrical Conduc

13、tors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current edition approved Sept. 1, 2008. Published October 2008.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Bo

14、ok of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3ESA Publications Division, ESTEC, P.O. Box 299, 2200 AG Noordwijk, TheNetherlands (ESA/SCC 3901 download available from www.escies.org).1Copyright ASTM International, 100 Barr Harbor Drive, PO Bo

15、x C700, West Conshohocken, PA 19428-2959, United States.4.4 Red Plague Corrosion TestRepresentative samples ofthe silver coated conductors shall conform to codes03oftheaccelerated corrosion test for un-insulated silver-plated con-ductors as outlined in section 9.2 (Explanatory Note 1).5. General Req

16、uirements5.1 TemperUnless otherwise specified, all coated conduc-tors shall be furnished in the annealed temper.5.2 ElongationThe elongation of stranded conductorsshall be permitted to vary from the requirements of theapplicable Specifications B 298 and B 624 by the followingamounts:5.2.1 For strand

17、ed silver coated copper conductors 22AWGand smaller, the test shall be performed on the whole conductorand the elongation measured when the first strand of theconductor breaks. The minimum average elongation shall notbe less than 10 % with no individual specimen less than 5 %.5.2.2 For stranded silv

18、er coated copper conductors largerthan 22 AWG, strands shall be carefully removed from theconductor and tested for elongation. The minimum averageelongation shall not be less than 10 % with no individual strandless than 5 %.5.2.3 For stranded silver coated copper alloy conductors, thetest shall be p

19、erformed on the whole conductor only and theelongation measured when the first strand of the conductorbreaks. The minimum elongation shall not be less than 6 %.6. Lay of Stranded Conductors6.1 The direction of lay of the outside layer of strandedconductors shall be left-hand.6.2 The direction of lay

20、 of the other layers shall be reversedin successive layers, unless otherwise agreed upon between themanufacturer and the purchaser.6.3 The length of lay of the individual wires composing theoutside layer of the stranded conductor shall not be less than 8nor more than 16 times the outside diameter of

21、 that layer.7. Joints7.1 No joints shall be made at the final draw prior tostranding. No joints shall be made in the individual strands orin the completed conductor during the stranding process.Necessary joints made in the wire and rods prior to finaldrawing shall be in accordance with the best work

22、manshippractice.8. Physical and Electrical Test8.1 Tests to determine conformance of the coating to therequirements prescribed in Section 4 shall be performed beforeinsulating.8.2 Tests to determine conformance to the elongation re-quirements prescribed in section 5.2 shall be made beforeinsulating.

23、8.3 Tests to determine conformance to electrical resistancerequirements prescribed in 3.1.2 shall be made on the uninsu-lated conductor in accordance with Test Method B 193.9. Test Methods9.1 Micro-Sectioning of Strands:9.1.1 The silver coating shall be evaluated for uniformcoating requirements usin

24、g the following procedure for micro-sectioning of strands. Section 9.1 shall be performed accordingto best commercial metallographic practice. Guide E3wouldprovide a good background reference for metallographic ex-amination and preparation of samples.9.1.2 The test specimen shall consist of untwiste

25、d strandsfrom the completed conductor. The test specimen shall beelectroplated with a copper or nickel coating, which is not lessthan 25 m. The copper or nickel coating will provideprotection of the specimen edges for follow-up grinding andpolishing preparation.9.1.3 Mount the test specimen in a low

26、 exotherm (heat)casting resin encapsulating the specimen for metallographicpreparation and cross-sectioning.9.1.4 The specimen should be ground and polished usingappropriate grinding disk pads and diamond paste. The dia-mond paste should go down to at least 0.25 m.9.1.5 Etch the polished specimen in

27、 a new solution ofammonia (commercially pure), which contains two drops of 37% hydrogen peroxide.9.1.6 Use a metallographic microscope to examine theetched cross-section with at least 4003 magnification. Thespecimen shall meet the requirements of section 4.1.9.2 Red Plague Corrosion Test:9.2.1 Appar

28、atus:(See Appendix X1 and Fig. 2).9.2.2 Preparation of Sample:9.2.2.1 The conductor to be used in test shall be taken fromthe test spool with a minimum of handling. Handling of theconductor must be done using powder free gloves.FIG. 1 Prepared Test SampleB9610829.2.2.2 The test samples shall be 8 to

29、 16 in. in length andattached to the polyethylene rod.9.2.2.3 The rod sample shall then be encapsulated in theheat shrinkable polyethylene tubing with one end having 20+/ 5 mm of conductor exposed. (Fig. 1).9.2.3 Preparation of Test Equipment:9.2.3.1 Temperature controlled bath shall be filled withd

30、e-ionized water and allowed sufficient time for bath to reachtesting temperature. (58C +/ 2C).9.2.3.2 Fill glass flask with 200 ml of de-ionized water andplace in temperature controlled bath to allow it to reach anequilibrium temperature.9.2.3.3 The test sample shall be inserted in a hole in therubb

31、er stopper. Insert copper wire between glass flask andrubber stopper to allow for air gap.9.2.3.4 The glass tube shall be inserted into the rubberstopper and the rubber stopper then fitted into the glass flask.9.2.3.5 Adjust glass tube height until it is immersed in thede-ionized water. Adjust sampl

32、e height until it is 20 +/ 5 mmabove the height of the de-ionized water in the flask (Fig. 2).9.2.3.6 Adjust oxygen (industrial oxygen with 99.2 % orgreater purity) supply to a flow rate of 50 +/ 10 bubbles permin.9.2.3.7 Water level evaporation in the temperature con-trolled bath should be prevente

33、d by a covering of any suitablematerial, e.g., Hollow Ball Bath Covers.9.2.4 Test:9.2.4.1 Test sample shall be exposed to controlled environ-ment for 240 h.9.2.4.2 After 240 h, the sample shall be removed fromcontrolled environment.9.2.5 Evaluation:9.2.5.1 Remove the clear polyethylene jacket immedi

34、atelyusing an appropriate cutting tool that does not damage theconductor.9.2.5.2 The test sample shall be evaluated within 3 h afterremoval from controlled environment.9.2.5.3 Inspect the sample using 203 magnification forcorrosion sites. The corrosion site will appear as red/blackcuprous oxide show

35、ing evidence of galvanic corrosion.9.2.5.4 The following criteria shall be used for the evalua-tion of the results for 7-strand conductors:CODE 0 NONE, no corrosion points.CODE 1 ONE POINT, on one or two adjacent strands inone location along the length of the sample.CODE 2 SLIGHT, on two to three ad

36、jacent strands in onelocation along the length of the sample.CODE 3 MODERATE, on two to three strands in two tothree locations along the length of the sample.CODE 4 MODERATE, on more than four adjacent strandsin four or more locations along length of the sample.CODE 5 SEVERE CORROSION, affecting mor

37、e than 50% of the total strands from the conductor in any one location.9.2.5.5 The following criteria shall be used for the evalua-tion of the results for 19-strand conductors:CODE 0 NONE, no corrosion points.CODE 1 ONE POINT, on one or two adjacent strands inone location along the length of the sam

38、ple.CODE 2 SLIGHT, on two to eight adjacent strands in onelocation along the length of the sample.CODE 3 MODERATE, on two to eight strands in two tothree locations along the length of the sample.CODE 4 MODERATE, on two to ten strands in four ormore locations along the length of the sample.FIG. 2 Dia

39、gram of Test Equipment for Red Plague Corrosion TestB961083CODE 5 SEVERE CORROSION, affecting more than 50% of the total strands from the conductor in any one location.9.2.5.6 Codes 0-3 would not be expected to affect theelectrical properties of the conductor. Codes 4 and 5 aregrounds for rejection.

40、 Refer toAppendix X2 for illustrations ofcorrosion criteria codes (Explanatory Note 2).10. Inspection10.1 All test and inspection shall be made at the place ofmanufacture. The manufacturer shall afford the inspectorrepresenting the purchaser all reasonable facilities, withoutcharge, to satisfy him t

41、hat the material is being furnished inaccordance with this specification.10.1.1 Unless otherwise agreed upon by the manufacturerand the purchaser, conformance of the wire to the variousrequirements of this specification shall be determined onsamples taken from each lot of wire presented for acceptan

42、ce.10.2 Terms Applying to Inspection:10.2.1 LotAlot is any amount of wire of one type and sizepresented for acceptance at one time.10.2.2 SampleA sample is a quantity of production units(coils, reels, etc.) selected at random from the lot for thepurpose of determining conformance of the lot to the r

43、equire-ments of this specification.10.2.3 SpecimenA specimen is a length of wire removedfor test purposes from any individual production unit of thesample.10.2.4 Sample SizeThe number of production units in asample shall be as follows:10.2.4.1 A full (100 % inspection) will be completed atevery set-

44、up prior to manufacturing the order.10.2.4.2 For coating of wire requirements listed in Section4, the sampling shall consist of each production unit from thelot. From each unit, one test specimen of sufficient length shallbe removed for performing the test.10.2.4.3 For elongation, dimensional measur

45、ements, andphysical measurements, the sampling shall consist of sequen-tial production units from the lot.11. Product Marking11.1 The net mass, size designation, type of conductor,purchase order number, and any other marks required by thepurchase order shall be attached to the conductor package.12.

46、Packaging and Package Marking12.1 Package sizes for conductors shall be agreed upon bythe manufacturer and the purchaser in the placing of individualorders.12.2 The conductors shall be protected against ordinaryhandling and shipping.13. Keywords13.1 copper-wire silver coated; copper alloy wire silve

47、rcoated; electronic space application; red-plague corrosion testEXPLANATORY NOTESNOTE 1Red Plague Corrosion occurs when a galvanic cell is formedbetween copper and silver. The red plague corrosion test provides anaccelerated test method to determine suitability of the conductor for use inelectronic

48、space applications. The Red Plague Corrosion test is based onthe work of Anthony and Brown4.NOTE 2The illustrations for corrosion codes are referenced fromECSS-Q-70-20A; however, the illustrations are representative of the barerating code as defined by this standard.APPENDIXES(Nonmandatory Informati

49、on)X1. RED PLAGUE CORROSION TEST APPARATUSX1.1 Microscope 203 Magnification.X1.2 Conical glass flasks ( 250 ml).X1.3 Natural rubber stopper.X1.4 Glass Tubing (3 to 6 mm ID).X1.5 Gas Flow regulator.X1.6 Supply of Oxygen Gas (industrial oxygen with 99.2 %or greater purity).X1.7 De-ionized water.X1.8 Length of copper wire 1 to 2 mm diameter.X1.9 Temperature regulated water bath, stability +/ 2C.X1.10 Thermometer 1C calibration.X1.11 Powder free gloves.X1.12 Wire Cutters.X1.13 Polyethylene heat shrinkable tubing (clear) in.I.D.4Anthony, P. L. and Brown, O. M., Red