1、Designation: B943 16Standard Specification forZinc and Tin Alloy Wire Used in Thermal Spraying forElectronic Applications1This standard is issued under the fixed designation B943; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 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. Scope*1.1 This specification covers zinc and tin alloy wire, includ-ing zinc-aluminum, zinc-aluminum-copper, zinc-tin,
3、 zinc-tin-copper and tin-zinc, used as thermal spray wire in the elec-tronics industry.1.1.1 Certain alloys specified in this standard are also usedas solders for the purpose of joining together two or moremetals at temperatures below their melting points, and for otherpurposes (as noted in Annex A1
4、). Specification B907 coversZinc, Tin and Cadmium BaseAlloys Used as Solders which areused primarily for the purpose of joining together two or moremetals at temperatures below their melting points and for otherpurposes (as noted in the Annex part of Specification B907).Specification B833 covers Zin
5、c and Zinc Alloy Wire forThermal Spraying (Metallizing) used primarily for the corro-sion protection of steel (as noted in the Annex part ofSpecification B833).1.1.2 Tin base alloys are included in this specificationbecause their use in the electronics industry is similar to the useof certain zinc a
6、lloys but different than the major use of the tinand lead solder compositions specified in Specification B32.1.1.3 These wire alloys have a nominal liquidus temperaturenot exceeding 850F (455C).1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses a
7、re mathematicalconversions to SI units that are provided for information onlyand are not considered 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 become familiarwith all hazar
8、ds including those identified in the appropriateSafety Data Sheet (SDS) for this product/material as providedby the manufacturer, to establish appropriate safety and healthpractices, and determine the applicability of regulatory limi-tations prior to use.2. Referenced Documents2.1 ASTM Standards:2B3
9、2 Specification for Solder MetalB833 Specification for Zinc and Zinc Alloy Wire for Ther-mal Spraying (Metallizing) for the Corrosion Protection ofSteelB899 Terminology Relating to Non-ferrous Metals and Al-loysB907 Specification for Zinc, Tin and Cadmium Base AlloysUsed as SoldersB949 Specification
10、 for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE46 Test Methods for Chemical Analysis of Lead- andTin-Base Solder (Withdrawn 1994)3E51 Method for Spectrographic Analysis of Tin Alloys bythe Po
11、wder Technique (Withdrawn 1983)3E87 Methods for Chemical Analysis of Lead, Tin, Antimonyand Their Alloys (Photometric Method) (Withdrawn1983)3B527 Test Method for Tap Density of Metal Powders andCompoundsE536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.2 Federal Standard:4Fed. Std. No
12、. 123 Marking for Shipment (Civil Agencies)2.3 ISO Standards:5ISO 3815-1 Zinc and zinc alloys Part 1: Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission spectrometry1This specification is under the j
13、urisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved May 1, 2016. Published July 2016. Originally approvedin 2005. Last previous edition approved in 2013 as B943 13. DOI: 10.1520/B0943-16.
14、2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is ref
15、erenced onwww.astm.org.4Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.*A Summary of Changes sec
16、tion appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.4 Military Standard:4MIL-STD-129 Marking for Shipment and Storage3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.4.
17、Classification4.1 Type DesignationThe type designation uses the fol-lowing symbols to properly identify the material:4.1.1 Alloy CompositionThe composition is identified bya two or four-letter symbol and a number. The letters typicallyindicate the chemical symbol for the critical element(s) in thewi
18、re and the number indicates the nominal percentage, byweight, of the primary element in the wire (see Table 1).5. Ordering Information5.1 Orders for material under this specification indicate thefollowing information, as required, to adequately describe thedesired material.5.1.1 Type designation (se
19、e 4.1),5.1.2 Detailed requirements for special forms,5.1.3 Dimensions of wire (see 9.2),5.1.4 Unit weight,5.1.5 Packaging (see Section 17),5.1.6 Marking (see Section 16),5.1.7 ASTM Specification number and issue, marked on (a)purchase order and (b) package or spool, and5.1.8 Special requirements, as
20、 agreed upon between sup-plier and purchaser.6. Materials and Manufacture6.1 See Specification B949.7. Chemical Composition7.1 The wire shall conform to the requirements prescribedin Table 1.7.2 The manufacturer shall perform chemical analyses asdirected in Test Methods E536 or by other methods of a
21、t leastequal accuracy to confirm that the wire conforms to therequirements of composition. In case of dispute, analysis byTest Methods E536 shall be accepted. Analysis of alloy wiresnot covered by Test Methods E536 shall be agreed uponbetween the manufacturer and the purchaser.NOTE 1By mutual agreem
22、ent between supplier and purchaser, analy-sis may be required and limits established for elements or compounds notspecified in Table 1.8. Dimensions and Unit Weight8.1 The dimensions and unit weight of wire are specified in5.1.3 and 5.1.4. The tolerance on specified outside diametershall be 65%or60.
23、002 in. (0.05 mm), whichever is greater.9. Workmanship, Finish, and Appearance9.1 See Specification B949.9.2 The wire shall be a continuous length per spool, coil, ordrum. Splices or welds are permitted, provided that they do notinterfere with the thermal spray equipment or coating process.9.3 The s
24、tarting end of each coil shall be tagged to indicatewinding direction and to be readily identifiable with ASTMdesignation.10. Sampling10.1 Sampling methodology should ensure that the sampleselected for testing is representative of the material. Themethod for sampling consists of one of the following
25、 methods:10.1.1 Analysis may be performed on finished wire, onmaterial selected when the wire is cast, or on samples takenfrom semi-finished wire.10.1.1.1 If the analysis is performed on finished wire, thefrequency of sampling for determination of chemical compo-sition shall be in accordance with Ta
26、ble 2. For spools and coils,the sample is obtained by cutting back 6 ft (1.8 m) of wire fromthe free end and then taking the next 6 ft for test. In otherforms, an equivalent sample is selected at random from thecontainer.10.1.1.2 If the analysis is performed on material selectedwhile the wire is bei
27、ng cast, at least one sample shall beselected for each source of molten metal.TABLE 1 Zinc and Zinc Alloy Wire CompositionsComposition %A,B,CTemperatureFCFC UNSDCd Zn Sn Pb Sb Ag Cu Al Bi As Fe Ni Mg Solidus LiquidusZn 98 Z30402 0.005 REM 0.003 0.005 0.10 0.015 0.005 1.52.5 0.02 0.002 0.02 0.005 0.0
28、2 720 382 770 410Zn 96 Z30506 0.005 REM 0.003 0.005 0.10 0.015 0.005 3.54.5 0.02 0.002 0.02 0.005 0.02 720 382 720 382Zn 95 Z30502 0.005 REM 0.003 0.005 0.10 0.015 0.005 4.55.5 0.02 0.002 0.02 0.005 0.02 720 382 720 382Zn 94 Z34530 0.005 REM 0.003 0.005 0.10 0.015 1.31.5 3.54.5 0.02 0.002 0.02 0.005
29、 0.02 730 388 734 390Zn 87 Z30705 0.005 REM 0.003 0.005 0.10 0.015 0.005 12.513.5 0.02 0.002 0.05 0.005 0.02 720 382 815 435Zn 85 Z30702 0.005 REM 0.003 0.005 0.10 0.015 0.005 14.016.0 0.02 0.002 0.06 0.005 0.02 720 382 842 450Zn/Sn 50 Z56900 0.005 REM 49.051.0 0.05 0.10 0.015 0.005 0.100 0.02 0.002
30、 0.02 0.005 0.02 388 198 680 360Zn/Sn 49 Z56930 0.005 REM 47.550.5 0.05 0.10 0.015 0.81.3 0.100 0.02 0.002 0.02 0.005 0.05 392 200 592 311Sn/Zn 60 L13281 0.005 REM 59.061.0 0.005 0.10 0.015 0.01 0.100 0.005 0.002 0.02 0.005 0.05 390 199 666 352Sn/Zn 70 L13271 0.005 REM 69.071.0 0.005 0.10 0.015 0.01
31、 0.100 0.005 0.002 0.02 0.005 0.05 390 199 601 316Sn/Zn 75 L13261 0.004 REM 74.076.0 0.20 0.10 0.015 0.05 0.050 0.020 0.020 0.02 0.005 0.05 390 199 572 300Sn/Zn 80 L13251 0.005 REM 79.081.0 0.05 0.10 0.015 0.01 0.100 0.005 0.002 0.02 0.005 0.05 390 199 536 280AFor purposes of acceptance and rejectio
32、n, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-handplace of figures, used in expressing the specified limit, in accordance with the rounding procedure prescribed in Practice E29.BAll values not given as a range are maximum val
33、ues unless stated otherwise.CRemainder (REM) determined arithmetically by difference.DThe USN designations were established in accordance with Practice B527. The last digit of a UNS number differentiates between alloys of similar composition.B943 16210.1.1.3 If the analysis is performed on samples t
34、aken fromsemi-finished product, at least one sample shall be analyzed foreach 10 000 lb (4500 kg) or fraction thereof.10.2 The manufacturer shall determine the diameter of thewire at the end and the beginning of each continuous wire in aproduction pack, coil, or spool of wire. Each determinationshal
35、l be the result of at least three measurements.10.3 The buyer reserves the right to reject wire that, duringuse, is found to be defective.11. Specimen Preparation11.1 Each sample of wire is prepared in accordance withSection 10 as applicable.12. Test Methods12.1 Visual and Dimensional Examination:12
36、.1.1 The wire must be examined to verify that thedimensions, unit weight, and workmanship are in accordancewith the applicable requirements.12.2 Alloy CompositionIn case of dispute, the chemicalanalysis is made in accordance with Test Methods E46, E51,E87, E536, ISO 3815-1, or ISO 3815-2.13. Inspect
37、ion13.1 See Specification B949.14. Rejection and Rehearing14.1 See Specification B949.15. Certification15.1 See Specification B949.16. Product Marking16.1 See Specification B949.17. Packaging and Package Marking17.1 The material shall be separated by size and preparedfor shipment in such a matter as
38、 to ensure acceptance bycommon carrier and to afford protection from the normalhazards of transport.17.2 Packaging materials for electric arc spray wire shall benonconductive.17.3 Size(s) of Packaging:17.3.1 Coil inside diameter may range from 12 to 22 in. (30to 56 cm).17.3.2 Coil weight shall be ap
39、proximately 45 to 55 lb (20 to25 kg).17.3.3 Production pack drums shall measure approximately22 in. (56 cm ) in diameter and approximately 32 in. (81 cm)high. Each drum shall contain a continuous wire, which iscoiled around a central core.17.3.4 Net weight per drum shall be 450 to 550 lb (205 to250
40、kg).17.3.5 When special preservation, packaging and packingrequirements are agreed upon between purchaser and supplier,marking for shipment of such material must be in accordancewith Fed. Std. No. 123 for civil agencies and MIL-STD-129 formilitary agencies.17.4 Each shipping unit shall be legibly ma
41、rked with thepurchase order number, size, gross, tare, net weights, and thename of the supplier. The specification number shall be shownwhen required.18. Keywords18.1 electronic applications; thermal spray; tin-zinc alloys;wire; zinc-aluminum alloys; zinc-aluminum-copper alloy;zinc-tin-copper alloy;
42、 zinc-tin alloySUPPLEMENTARY REQUIREMENTSThe following supplementary requirements apply for all agencies of the United States Governmentor only when specified by the purchaser as part of the purchase order or contract.S1. Responsibility for InspectionS1.1 The producer or supplier shall be responsibl
43、e for theperformance of all inspection requirements as specified herein.Except as otherwise specified in the contract or order, thesupplier may use his own or any other facilities suitable for theperformance of the inspection requirements specified hereinunless disapproved by the purchaser. The purc
44、haser retains theright to perform any of the inspections and tests set forth in thisspecification, where such inspections and tests are deemednecessary, to ensure that the supplies and services conform tothe prescribed requirements.TABLE 2 Frequency of SamplingSize of Lot,lb (kg)Number of Samples(sp
45、ools, coils, containersor pieces)Up to 1000 (450), incl 3Over 1000 to 10 000 (450 to 4500), incl 5Over 10 000 (4500) 10B943 163ANNEX(Mandatory Information)A1. INTENDED USEA1.1 Alloy Compositions:A1.1.1 Zn 98This is a high temperature, high strengthsolder for joining aluminum to aluminum and offers h
46、ighcorrosion resistance.A1.1.2 Zn 96This zinc-aluminum solder is similar to Zn97 but with a slightly shorter temperature range.A1.1.3 Zn 95This zinc-aluminum eutectic solder is usedwhere temperature limitations are critical and in applicationswhere an extremely short melting range is required.A1.1.4
47、 Zn 94This zinc-aluminum-copper solder has alower melting temperature than Zn 90.A1.1.5 Zn 87This alloy is similar to Zn 85 but with alower liquidus temperature.A1.1.6 Zn 85This alloy is also used as a thermal spraywire for the corrosion protection of steel. It has the highesttemperature (830F) of a
48、ll the aluminum solder compositions.A1.1.7 Zn/Sn 50This medium strength zinc-tin alloy isused when a long melting range is required.A1.1.8 Zn/Sn 49This zinc-tin-copper alloy was developedprimarily for the repair of galvanized steel sheet. Its widemelting range makes it an ideal alloy for coating lar
49、ge areaswhere galvanizing has been removed. It is also used as amedium temperature, high strength aluminum solder.A1.1.9 Zn/Sn 60This alloy is used as a thermal spray wireby the electronics industry in the production of capacitors. It isused in higher temperature applications to solder aluminum toaluminum and aluminum to copper. It has good strength andgood corrosion resistance.A1.1.10 Zn/Sn 70This alloy is used as a thermal spraywire by the electronics industry in the production of capacitors.It is also a general-purpose aluminum solder simila
