1、Designation: B774 00 (Reapproved 2014)Standard Specification forLow Melting Point Alloys1This standard is issued under the fixed designation B774; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、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 low-melting point metal alloysand solders, including bismuth-tin, bismuth-lead, bismuth-tin-lead, bismuth-tin-lead-c
3、admium, bismuth-tin-lead-indium-cadmium, bismuth-tin-lead-indium, indium-lead, and indium-lead-silver, and indium-tin joining together two or more metalsat temperatures below their melting points; blocking forsupport and removable borders; radiation shielding; fusibleplugs; fuses; tube bending; and
4、punch setting.1.1.1 This specification shall include those alloys having aliquidus temperature not exceeding 361F (183C), the meltingpoint of the tin lead eutectic.1.1.2 This specification includes low-melting point alloys inthe form of solid bars, ingots, powder and special forms, and inthe form of
5、 solid ribbon and wire.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 are not considered standard.1.3 This standard does not purport to address all of thesafety
6、 concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish appropriatesafety
7、and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E55 Practice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical CompositionE88 Practice for Sampling Nonferrous Metals and Alloys inCast
8、Form for Determination of Chemical Composition2.2 Military Standard:MIL-STD 129 Marking for Shipment and Storage32.3 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)33. Terminology3.1 Definitions:3.1.1 producer, nthe primary manufacturer of the mate-rial.3.2 Definitions of Te
9、rms Specific to This Standard:3.2.1 liquidus, nthe lowest temperature at which an alloyis fully transformed from a solid to a liquid.3.2.2 lot, nthe term “lot” as used in this specification shallbe defined as follows: for solid alloy metal, a lot shall consistof all the metal of the same time design
10、ation, produced fromthe same batch of raw materials under essentially the sameconditions, and offered for inspection at one time.3.2.3 lot number, nthe term “lot number” as used in thisspecification refers to a numerical designation for a lot that istraceable to a date of manufacture.3.2.4 solidus,
11、nthe highest temperature at which an alloyis fully transformed from a liquid to a solid.4. Classification4.1 Type DesignationThe type designation shall use thefollowing symbols to properly identify the material:4.1.1 Alloy CompositionThe composition is identified bythree numbers that relate to the m
12、elting point in degreesFahrenheit where it is eutectic or six numbers where it is arange alloy.4.1.2 FormThe form is indicated by a single letter inaccordance with Table 1.4.1.3 Powder Mesh SizeThe powder mesh size is identi-fied by a size symbol number (Table 2).5. Ordering Information5.1 Orders fo
13、r material under this specification shall indi-cate the following information, as required, to adequatelydescribe the desired material:1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.02 on Refined
14、Lead, Tin, Antimony, and Their Alloys.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1987. Last previous edition approved in 2010 as B774 00 (2010).DOI: 10.1520/B0774-00R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cust
15、omer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.
16、mil.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.1 Type designation (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)
17、,5.1.6 Marking (see Section 17),5.1.7 ASTM specification designation and year of issue,marked on the purchase order and on the package or spool, and5.1.8 Special requirements, as agreed upon between sup-plier and purchaser.6. Materials and Manufacture6.1 The producer shall use care to have each lot
18、of alloy asuniform in quality as practicable and of satisfactory appearancein accordance with the best industrial practices. Each bar,ingot, or other form in which the alloy is sold shall be uniformin composition within the entire lot.7. Chemical Composition7.1 The composition of the alloys covered
19、by this specifi-cation shall be as shown in Table 3.NOTE 1By mutual agreement between the supplier and the purchaser,analysis may be required and limits established for elements or com-pounds not specified in Table 3.8. Physical and Performance Requirements8.1 Alloy must freeze within 2F of its soli
20、dus.8.2 Powder Mesh SizeThe powder mesh size shall be asspecified in 5.1.1 and 4.1.3.9. Dimensions and Unit Weight9.1 Bar and IngotThe dimensions and unit weight of barand ingot shall be agreed between the supplier and purchaser.9.2 Wire (Solid)The dimensions and unit weight of wirealloys shall be a
21、s specified in 5.1.3 and 5.1.4. The tolerance onthe specified outside diameter shall be 65%or 60.002 in.(0.05 mm), whichever is greater.9.3 Other Forms:9.3.1 Dimensions for ribbon and special forms shall be asagreed between the supplier and purchaser.9.3.2 The unit weight of alloy powder shall be as
22、 specifiedin 5.1.4.10. Workmanship, Finish, and Appearance10.1 All forms of the alloys shall be processed in such amanner as to be uniform in quality and free of defects that willaffect life, serviceability, or appearance.11. Sampling for Chemical Analysis11.1 Care must be taken to ensure that the s
23、ample selectedfor testing is representative of the material. The method ofsampling shall consist of one of the following methods:11.1.1 Samples may be taken from the final solidified cast orfabricated product.11.1.2 Representative samples may be obtained from the lotof molten metal during casting. T
24、he molten sample shall bepoured into a cool mold, forming a bar approximately 0.25 in.(6.4 mm) thick.TABLE 1 FormSymbol FormB barI ingotP powderR ribbonS special (includes pellets, preforms, shot, etc.W wireTABLE 2 Powder Mesh SizeSize Symbol Powder Mesh Size3 3252 2001 100TABLE 3 Chemical Requireme
25、nts Composition, wt. %(range or maximum rules)AlloyDesignationConstituents wt % Melting PointsSolidus LiquidusBi Pb Sn Cd In Ag Cu Sb Zn F C F C117 44.245.2 22.123.1 7.88.8 4.85.8 18.619.6 0.001 0.08 0.1 0.08 117 47 117 47129133 48.1450.14 16.9218.92 10.5512.55 129 54 133 56136 48.549.5 17.518.5 11.
26、512.5 0.005 20.521.5 0.001 0.08 0.1 0.08 136 58 136 58158 49.550.5 26.227.2 12.813.8 9.510.5 0.008 0.001 0.08 0.1 0.08 158 70 158 70158165 49.550.5 24.4525.45 12.013.0 12.013.0 0.10 158 70 165 74158190 42.043.0 37.238.2 10.811.8 8.09.0 0.008 0.001 0.08 0.1 0.08 158 70 190 88174 56.557.5 0.05 16.517.
27、5 0.005 25.526.5 0.001 0.08 0.1 0.08 174 79 174 79203 52.053.0 31.532.5 15.016.0 0.005 0.008 0.001 0.08 0.1 0.08 203 95 203 95203239 49.550.5 24.525.5 24.525.5 203 95 239 115216217 53.554.5 25.526.5 19.520.5 216 102 217 103255 55.056.0 44.045.0 0.01 0.005 0.008 0.001 0.08 0.1 0.08 255 124 255 124281
28、 57.558.5 0.05 41.542.5 0.005 0.008 0.01 0.08 0.1 0.08 281 138 281 138281338 39.540.5 0.05 59.560.5 0.005 0.008 0.01 0.08 0.1 0.08 281 138 338 170291325 13.514.5 42.543.5 42.543.5 0.005 0.008 0.01 008 0.1 0.08 291 144 325 163244 0.01 0.05 47.548.5 0.005 51.552.5 0.01 0.08 0.1 0.08 244 118 244 118296
29、 0.01 0.05 0.01 0.005 96.597.5 2.83.2 0.08 0.1 0.08 296 147 296 147293 0.01 29.931.1 50.751.7 17.718.7 0.008 0.01 0.08 0.1 0.08 293 145 293 145300302 0.01 14.515.5 0.01 0.005 79.580.5 4.55.5 0.08 0.1 0.08 300 149 302 150307323 0.01 17.518.5 69.570.5 0.005 11.512.5 0.01 0.08 0.1 0.08 307 153 323 1623
30、20345 0.01 29.530.5 0.01 0.005 69.570.5 0.01 0.08 0.1 0.08 320 160 345 174B774 00 (2014)211.2 Frequency of SamplingFrequency of sampling fordetermination of chemical composition shall be in accordancewith Table 4. For spools and coils, the sample shall be obtainedby cutting back 6 ft (1.8 m) of wire
31、 from the free end and thentaking the next 6 ft for test. In other forms, an equivalentsample shall be selected at random from the container.11.3 Other Aspects of SamplingOther aspects of samplingshall conform, in the case of bar and ingots, to Practice E88.For fabricated alloys the appropriate refe
32、rence is Practice E55.12. Sample Preparation12.1 Bar and IngotEach sample piece shall be cut in half,and one half marked with sampling date and composition, andshall be held in reserve. The remaining half shall be melted ina clean container, mixed thoroughly and poured into a coolmold, forming a bar
33、 approximately 0.25 in. (6.4 mm) thick.Sampling may be performed by one of the following methods:12.1.1 SawingIf it is impractical to melt the bar or ingot asspecified in 12.1, saw cuts shall be made across each piece atequal intervals of not more than 1 in. (25 mm) throughout itslength. No lubrican
34、ts shall be used during sawing. The sampleshall consist of not less than 5 oz (143 g) of mixed sawings.12.1.2 DrillingThe bar shall be drilled at least halfwaythrough from two opposite sides. A drill of about 0.50 in. (12.7mm) in diameter is preferred. In drilling, the holes shall beplaced along a d
35、iagonal line from one corner of the pig to theother. The drillings shall be clipped into pieces not over 0.50 in.(12.7 mm) in length and mixed thoroughly. The sample shallconsist of not less than 5 oz (143 g).13. Test Methods13.1 Visual and Dimensional Examination:13.1.1 Ribbon and WireRibbon and wi
36、re shall be exam-ined to verify that the dimensions, unit weight, and workman-ship are in accordance with the applicable requirements.13.1.2 Bar and IngotBar and ingot shall be examined toverify that the unit weight, marking, and workmanship are inaccordance with the applicable requirements.13.2 All
37、oy CompositionIn case of dispute, the chemicalanalysis shall be as agreed by buyer and seller.13.3 Alloy Freezing PointThis shall be determined byplotting on a time temperature graph the results of a roomtemperature cooldown to 72F (22C) on a 2-lb (1000-g)sample of alloy, non-stirred using an ASTM a
38、pproved ther-mometer. An example of commercial equipment available forthis is a Leeds and Northrop Speedomax W.4,5Use of adifferential scanning calorimeter is also permissible under thissection (Dupont Model 9125,6, or equivalent).13.4 Powder Mesh SizeA minimum of 98 % of the pow-der shall pass thro
39、ugh the appropriate size sieve (see 4.1.3)inorder to be classified for that mesh size.14. Inspection14.1 Unless otherwise specified in the contract or purchaseorder, the supplier is responsible for the performance of allinspection requirements as specified herein. Except as other-wise specified in t
40、he contract or order, the supplier may use hisown or any other facilities suitable for the performance of theinspection requirements specified unless disapproved by thepurchaser. The purchaser reserves the right to perform any ofthe inspections set forth in the specification where suchinspections ar
41、e deemed necessary to ensure that supplies andservices conform to prescribed requirements.14.1.1 Test Equipment and Inspection FacilitiesTest andmeasuring equipment and inspection facilities of sufficientaccuracy, quality, and quantity to permit performance of therequired inspection shall be establi
42、shed and maintained by thesupplier.15. Rejection and Rehearing15.1 Material that fails to conform to the requirements ofthis specification may be rejected. Rejection shall be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test, the prod
43、ucer orsupplier may make a claim for a rehearing.16. Certification16.1 When specified in the purchase order or contract, aproducers or suppliers certification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification an
44、d hasbeen found to meet the requirements. When specified in thepurchase order or contract, a report of the test results shall befurnished.17. Product Marking17.1 The producers name or trademark shall be stamped orcast on each bar or ingot. The alloy grade designation ornominal composition, or both,
45、shall be stamped on each bar oringot for identification along with the specification number.17.2 Each spool or container shall be marked to show thespecification number, type designation, dimensions, and unitweight of wire or other form and lot number. The producersname or trademark shall be marked
46、on the spool or container.4The sole source of supply of the commercial equipment known to thecommittee at this time is Northrop Speedomax W, available from Leeds andNorthrop, MD 363-TR North Wales, PA 19454.5If you are aware of alternative suppliers, please provide this information toASTM Internatio
47、nal. Your comments will receive careful consideration at a meetingof the responsible technical committee,1which you may attend.6The sole source of supply of the apparatus known to the committee at this timeis Differential Scanning Calorimeter Dupont Model 912, available from DuPontInstrument Systems
48、 Division, Wilmington, DE 19898.TABLE 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) 10B774 00 (2014)318. Packaging and Package Marking18.1 The material shall be packa
49、ged to provide adequateprotection during normal handling and transportation. The typeof packaging and gross weight of containers shall, unlessotherwise agreed upon, be at the producers or suppliersdiscretion, provided that they are such as to ensure acceptanceby common or other carriers for safe transportation to thedelivery point.18.1.1 For bar and ingot a lot number shall be marked oneach shipping container or inside package.18.1.2 When special preservation, packaging
