1、Designation: B 774 00 (Reapproved 2005)Standard Specification forLow Melting Point Alloys1This standard is issued under the fixed designation B 774; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
2、r in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers low-melting point metal alloysand soldiers, including bismuthtin, bismuthlead, bismuth-tinlead, bismuthtinleadcad
3、mium, bismuthtinleadindi-umcadmium, bismuthtinleadindium, indiumlead, and in-diumleadsilver, and indiumtin joining together two or moremetals at temperatures below their melting points; blocking forsupport and removable borders; radiation shielding; fusibleplugs; fuses; tube bending; and punch setti
4、ng.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 solid ribb
5、on and wire.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.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 stand
6、ard 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 and health practices, and determine the applicability ofregulatory limitations prior to use.2
7、. Referenced Documents2.1 ASTM Standards:2E55 Practice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical CompositionE88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical Composition2.2 Military Standard:MIL-STD 129 Marking for S
8、hipment and Storage32.3 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)33. Terminology3.1 Definition:3.1.1 producer, n the primary manufacturer of the mate-rial.3.2 Definitions of Terms Specific to This Standard:3.2.1 liquidus, nthe lowest temperature at which an alloyis ful
9、ly 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 designation, produced fromthe same batch of raw materials under essentially the sameconditions, and
10、 offered for inspection at one time.3.2.3 lot number, n the 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, nThe highest temperature at which an alloyis fully transformed from a liquid to a solid.4. C
11、lassification4.1 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 melting point in degreesFahrenheit where it is eutectic or six numbers where it is arange all
12、oy.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 for material under this specification shall indi-cate the following information, as required,
13、to adequatelydescribe the desired material:5.1.1 Type designation (see 4.1),5.1.2 Detailed requirements for special forms,1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.02 on Refined Lead, Tin, An
14、timony, and Their Alloys.Current edition approved Nov. 1, 2005. Published February 2006. Originallyapproved in 1987. Last previous edition approved in 2000 as B 774 - 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annu
15、al 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 19111-5098.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C70
16、0, West Conshohocken, PA 19428-2959, United States.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 designation and year of issue,marked on the purchase order and on the package or spool, a
17、nd5.1.8 Special requirements, as agreed upon between sup-plier and purchaser.6. Materials and Manufacture6.1 The producer shall use care to have each lot of alloy asuniform in quality as practicable and of satisfactory appearancein accordance with the best industrial practices. Each bar,ingot, or ot
18、her 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 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
19、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 solidus.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
20、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 as 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
21、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 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 qual
22、ity and free of defects that willaffect life, serviceability, or appearance.11. Sampling for Chemical Analysis11.1 Care must be taken to ensure that the sample selectedfor testing is representative of the material. The method ofsampling shall consist of one of the following methods:11.1.1 Samples ma
23、y be taken from the final solidified cast orfabricated product.11.1.2 Representative samples may be obtained from the lotof molten metal during casting. The 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
24、ribbonS special (includes pellets, preforms, shot, etc.W wireTABLE 2 Powder Mesh SizeSize Symbol Powder Mesh Size3 3252 2001 100TABLE 3 Chemical Requirements Composition, wt. %(range or maximum rules)AlloyDesignationConstituents wt % Melting PointsSolidus LiquidusBi Pb Sn Cd In Ag Cu Sb Zn F C F C11
25、7 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 11.512.5 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.
26、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 16.517.5 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 24.5
27、25.5 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 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 0.08 281 138 338 170
28、291325 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 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 145300
29、302 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 162320345 0.01 29.530.5 0.01 0.005 69.570.5 0.01 0.08 0.1 0.08 320 160 345 174B 774 00 (2005)211.2 Frequency of SamplingFrequency of sampling fordeter
30、mination 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 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
31、 Other Aspects of SamplingOther aspects of samplingshall conform, in the case of bar and ingots, to Practice E88.For fabricated alloys the appropriate reference 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 c
32、omposition, andshall be held in reserve. The remaining half shall be melted ina clean container, mixed thoroughly and poured into a coolmold, forming a bar 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 ba
33、r or ingotas specified in 12.1, saw cuts shall be made across each pieceat equal intervals of not more than 1 in. (25 mm) throughout itslength. No lubricants 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
34、 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 diagonal 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 th
35、oroughly. 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 wire 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
36、and IngotBar and ingot shall be examined toverify that the unit weight, marking, and workmanship are inaccordance with the applicable requirements.13.2 Alloy CompositionIn case of dispute, the chemicalanalysis shall be as agreed by buyer and seller.13.3 Alloy Freezing PointThis shall be determined b
37、yplotting 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 approved ther-mometer. An example of commercial equipment available forthis is a Leeds and Northrop Speedomax W.4,5Use of adifferential scanning c
38、alorimeter is also permissible under thissection (Dupont Model 9125,6, or equivalent).13.4 Powder Mesh SizeA minimum of 98 % of thepowder shall pass through the appropriate size sieve (see 4.1.3)in order to be classified for that mesh size.14. Inspection14.1 Unless otherwise specified in the contrac
39、t or purchaseorder, the supplier is responsible for the performance of allinspection requirements as specified herein. Except as other-wise specified in the contract or order, the supplier may use hisown or any other facilities suitable for the performance of theinspection requirements specified unl
40、ess disapproved by thepurchaser. The purchaser reserves the right to perform any ofthe inspections set forth in the specification where suchinspections are deemed necessary to ensure that supplies andservices conform to prescribed requirements.14.1.1 Test Equipment and Inspection FacilitiesTest andm
41、easuring equipment and inspection facilities of sufficientaccuracy, quality, and quantity to permit performance of therequired inspection shall be established and maintained by thesupplier.15. Rejection and Rehearing15.1 Material that fails to conform to the requirements ofthis specification may be
42、rejected. Rejection shall be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make a claim for a rehearing.16. Certification16.1 When specified in the purchase order or contract, aproducers or suppliers c
43、ertification shall be furnished to thepurchaser that the material was manufactured, sampled, tested,and inspected in accordance with this specification and hasbeen found to meet the requirements. When specified in thepurchase order or contract, a report of the test results shall befurnished.17. Prod
44、uct Marking17.1 The producers name or trademark shall be stamped orcast on each bar or ingot. The alloy grade designation ornominal composition, or both, 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 t
45、hespecification number, type designation, dimensions, and unitweight of wire or other form and lot number. The producersname or trademark shall be marked on the spool or container.18. Packaging and Package Marking18.1 The material shall be packaged to provide adequateprotection during normal handlin
46、g and transportation. The type4The 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 Intern
47、ational. 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 Sys
48、tems 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) 10B 774 00 (2005)3of packaging and gross weight of containers shall, unlessoth
49、erwise 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 and packingrequirements are agreed upon between purchaser and supplier,marking for shipment of such material shall be in accordance
