1、Designation: B907 16Standard Specification forZinc, Tin and Cadmium Base Alloys Used as Solders1This standard is issued under the fixed designation B907; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、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 solder metal alloys (commonlyknown as soft solders), including zinc-aluminum, zinc-aluminum-copper, zinc-tin
3、, zinc-tin-copper, zinc-cadmium-tin,zinc-cadmium, tin-zinc, cadmium-zinc, cadmium-zinc-silver,and cadmium-silver, used as solders for the purpose of joiningtogether two or more metals at temperatures below theirmelting points.1.1.1 Certain alloys specified in this standard are also usedas Thermal Sp
4、ray Wire in the electronics industry and arecovered for this purpose in Specification B943. SpecificationB833 covers Zinc and Zinc Alloy Wire for Thermal Spraying(Metallizing) used primarily for the corrosion protection ofsteel (as noted in Annex A1 of this specification).1.1.2 Tin base alloys are i
5、ncluded in this specificationbecause their use in the electronics industry is different than themajor use of the tin and lead solder compositions specified inSpecification B32.1.1.3 These solders include alloys having a nominal liqui-dus temperature not exceeding 850F (455C).1.1.4 This specification
6、 includes solder in the form of solidbars, ingots, wire, powder and special forms, and in the form ofsolder paste.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand
7、 are not considered standard.1.3 ToxicityWarning: Soluble and respirable forms ofcadmium may be harmful to human health and the environmentin certain forms and concentrations. Therefore, ingestion andinhalation of cadmium should be controlled under the appro-priate regulations of the U.S. Occupation
8、al Safety and HealthAdministration (OSHA). Cadmium-containing alloys and coat-ings should not be used on articles that will contact food orbeverages, or for dental and other equipment that is normallyinserted in the mouth. Similarly, if articles using cadmium-containing alloys or coatings are welded
9、, soldered, brazed,ground, flame-cut, or otherwise heated during fabrication,adequate ventilation must be provided to maintain occupationalcadmium exposure below the OSHA Permissible ExposureLevel (PEL).1.4 This standard does not purport to address all of thesafety concerns, if any, associated with
10、its use. It is theresponsibility of the user of this standard to become familiarwith all hazards 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 appli
11、cability of regulatory limi-tations prior to use.2. Referenced Documents2.1 ASTM Standards:2B32 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
12、-loysB943 Specification for Zinc and Tin Alloy Wire Used inThermal Spraying for Electronic ApplicationsB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE46 Test Methods for Che
13、mical Analysis of Lead- andTin-Base Solder (Withdrawn 1994)3E51 Method for Spectrographic Analysis of Tin Alloys bythe Powder Technique (Withdrawn 1983)3E55 Practice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical CompositionE87 Methods for Chemical Analysis of Lead, T
14、in, Antimonyand Their Alloys (Photometric Method) (Withdrawn1983)3E88 Practice for Sampling Nonferrous Metals and Alloys in1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and Alloys and is the direct responsibility ofSubcommittee B02.04 on Zinc and
15、Cadmium.Current edition approved May 1, 2016. Published July 2016. Originally approvedin 2000. Last previous edition approved in 2013 as B907 13. DOI: 10.1520/B0907-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual
16、 Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbo
17、r Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Cast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.2 Federal Standard:4Fed. Std. No.
18、 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 spectrometry2.4 Military Standard:4Mil-Std-129
19、Marking for Shipment and Storage3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.4. 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-let
20、ter symbol and a number. The letters typicallyindicate the chemical symbol for the critical element in thesolder and the number indicates the nominal percentage, byweight, of the critical element in the solder (see Table 1).4.1.2 FormThe form is indicated by a single letter inaccordance with Table 2
21、.4.1.3 Powder Mesh Size (applicable only to solder paste)The powder mesh size is identified by a single letter inaccordance with Table 3.4Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.5Available from American National Stan
22、dards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 Solder CompositionsTable 1a: Zinc Base AlloysComposition %A,B,CTemperatureUNSDCd Zn Sn Pb Sb Ag Cu Al Bi As Fe Ni Mg Solidus LiquidusFCFCZn 98 Z30402 0.005 REM 0.003 0.005 0.10 0.015 0.005 1.52.5 0.02 0.
23、002 0.02 0.005 0.02 720 382 770 410Zn 97 Z30505 0.005 REM 0.003 0.005 0.10 0.015 0.005 2.53.5 0.02 0.002 0.02 0.005 0.02 720 382 743 395Zn 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
24、 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 0.02 730 388 734 390Zn 90 Z34550 0.004 88.092.0 0.003 0.005 0.10 0.015 3.06.0 3.06.0 0.02 0.002 0.100 0.005 0.05 720 382 797 425Zn 87 Z30705 0.005 REM 0.003 0.005 0.10 0.015 0.005
25、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 80 Z30800 0.005 REM 0.003 0.005 0.10 0.015 0.005 19.520.5 0.02 0.002 0.08 0.005 0.02 720 382 896 480Zn/Sn 50 Z56900 0.005 REM 49.051.0 0.05 0.1
26、0 0.015 0.005 0.100 0.02 0.002 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 311Zn/Sn 27EZ13371 33.0 26.028.0 REM 0.05 0.10 0.015 0.05 0.050 0.02 0.020 0.02 0.005 0.05 351 177 500 260Zn/Cd 90EZ50940 REM 89.091.0
27、0.003 0.05 0.10 0.015 0.05 0.100 0.02 0.002 0.02 0.005 0.05 509 265 738 392Zn/Cd 60EZ50980 REM 59.061.0 0.003 0.05 0.10 0.015 0.05 0.100 0.02 0.002 0.02 0.005 0.05 509 265 648 342Table 1b: Tin Base AlloysComposition %A,B,CTemperatureUNS Cd Zn Sn Pb Sb Ag Cu Al Bi As Fe Ni Mg Solidus LiquidusFCFCSn/Z
28、n 60 L13281 0.005 REM 59.061.0 0.05 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 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
29、 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 280Sn/Zn 91 L13241 0.005 REM 90.092.0 0.05 0.10 0.015 0.01 0.100 0.005 0.002 0.02 0.005 0.05 390 199 390 199Table 1c: Cadmium Base AlloysComposition %A,B,CTemperatureUNS Cd Zn Sn Pb Sb A
30、g Cu Al Bi As Fe Ni Mg Solidus LiquidusFCFCCd 60 L01181 REM 39.041.0 0.003 0.05 0.10 0.015 0.05 0.100 0.02 0.002 0.02 0.005 0.05 509 265 601 316Cd 70 L01171 REM 29.031.0 0.003 0.05 0.10 0.015 0.05 0.100 0.02 0.002 0.02 0.005 0.05 509 265 572 300Cd 78 L01255 REM 11.013.0 0.003 0.05 0.10 4.55.5 0.05 0
31、.100 0.02 0.002 0.02 0.005 0.05 480 249 601 316Cd 83 L01161 REM 16.018.0 0.003 0.05 0.10 0.015 0.05 0.100 0.02 0.002 0.02 0.005 0.05 509 265 509 265Cd 95 L01331 REM 0.007 0.003 0.05 0.10 4.55.5 0.05 0.100 0.02 0.002 0.02 0.005 0.05 640 338 739 393AFor purposes of acceptance and rejection, the observ
32、ed 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 values unless st
33、ated otherwise.CRemainder (REM) determined arithmetically by difference.DThe USN designations were established in accordance with Practice E527. The last digit of a UNS number differentiates between alloys of similar composition.EThese alloys are listed with the zinc base alloys even though they con
34、tain significant amounts of cadmium because their use is similar to those of the other alloys inTable 1A.B907 1625. Ordering Information5.1 Orders for material under this specification indicate thefollowing information, as required, to adequately describe thedesired material.5.1.1 Type designation (
35、see 4.1),5.1.2 Detailed requirements for special forms,5.1.3 Dimensions of ribbon and wire solder (see 9.2),5.1.4 Unit weight,5.1.5 Packaging (see Section 18),5.1.6 Marking (see Section 17),5.1.7 ASTM Specification number and issue, marked on (a)purchase order and (b) package or spool, and5.1.8 Spec
36、ial requirements, as agreed upon between sup-plier and purchaser.6. Materials and Manufacture6.1 See Specification B949.7. Chemical Composition7.1 Solder AlloyThe solder alloy composition is as speci-fied in Table 1.NOTE 1By mutual agreement between supplier and purchaser, analy-sis may be required
37、and limits established for elements or compounds notspecified in Table 4.8. Physical Properties and Performance Requirements8.1 Solder PasteSolder paste must exhibit smoothness oftexture (no lumps) and the absence of caking and drying duringstorage and application. Some applications may require a fa
38、stdrying formulation.8.1.1 Powder Mesh SizeThe solder powder mesh sizeshall be as specified (see Section 4.1.3) when the extractedsolder powder is tested as agreed upon between supplier andpurchaser.8.1.2 ViscosityThe viscosity of solder paste and themethod used to determine the viscosity must be ag
39、reed uponbetween the supplier and the purchaser.8.2 The following variables must be taken into accountwhen relating one viscosity measurement to another: type ofviscometer used, spindle size and shape, speed (r/min), tem-perature and the recent mixing history of the sample, and theuse or non-use of
40、a helipath.9. Dimensions and Unit Weight9.1 Bar and Ingot SolderThe dimensions and unit weightof bar and ingot solder will be as agreed upon between supplierand purchaser.9.2 Wire SolderThe dimensions and unit weight of wiresolder are specified in 5.1.3 and 5.1.4. The tolerance onspecified outside d
41、iameter shall be 65%or60.002 in. (0.05mm), whichever is greater.9.3 Other forms:9.3.1 Dimension for ribbon and special forms will be agreedupon between supplier and purchaser.9.3.2 The unit weight of solder paste is specified in 5.1.4.10. Workmanship, Finish, and Appearance10.1 See Specification B94
42、9.11. Sampling11.1 Care must be taken to ensure that the sample selectedfor testing is representative of the material. The method forsampling consists of one of the following methods:11.1.1 Samples taken from the final solidified cast of fabri-cated product.11.1.2 Representative samples obtained fro
43、m the lot ofmolten metal during casting. The molten sample is poured intoa cool mold, forming a bar approximately14 in. (6.4 mm)thick.11.2 Frequency of SamplingFrequency of sampling fordetermination of chemical composition shall be in accordancewith Table 4. For spools and coils, the sample is obtai
44、ned bycutting back 6 ft (1.8 m) of wire from the free end and thentaking the next 6 ft for test. In other forms, an equivalentsample is selected at random from the container.11.3 Other aspects of SamplingOther aspects of samplingconforms in the case of bar and ingots, to Practice E88. Forfabricated
45、solders the appropriate reference is Practice E55.12. Specimen Preparation12.1 Solid Ribbon and Wire SolderEach sample of solidribbon and wire solder is prepared in accordance with 12.1 asapplicable.12.2 Bar and Ingot SolderEach sample piece is cut in halfand one half marked and held in reserve. The
46、 remaining half ismelted in a clean container, mixed thoroughly and poured intoa cool mold, forming a bar approximately14 in. (6.4 mm)thick. Sampling is performed by one of the following methods:TABLE 2 FormSymbol FormB BarI IngotP PowderR RibbonS SpecialAW WireAIncludes pellets, preforms, etc.TABLE
47、 3 Powder Mesh SizeSize Symbol Powder Mesh SizeA 325B 200C 100D 60TABLE 4 Frequency of SamplingSize of Lot, lb (kg) Number of Samples (spools, coils,containers or pieces)Up to 1000 (450), incl 3Over 1000 to 10,000 (450 to 4500), incl 5Over 10,000 (4500) 10B907 16312.3 SawingSaw cuts are made across
48、the bar at equalintervals of not more than 1 in. (2.5 cm) throughout its length.If it is impractical to melt the bar or ingot as specified above,saw cuts are made across each piece at equal intervals of notmore than 1 in. (2.5 cm) throughout its length. No lubricantsare used during sawing. The speci
49、men consists of not less than5 oz (143 g).12.4 DrillingThe bar is drilled at least halfway throughfrom the opposite sides. A drill of about12 in. (12.7 mm) indiameter is preferred. In drilling, the holes are placed along adiagonal line from one corner of the ingot to the other. Thedrillings are clipped into pieces not over12 in. (12.7 mm) inlength and mixed thoroughly. The specimen consists of not lessthan 5 oz (143g).13. Test Methods13.1 Visual and Dimensional Examination13.1.1 Ribbon and Wire SolderRibbon and wire solde
