1、Designation: F289 96 (Reapproved 2014)Standard Specification forMolybdenum Wire and Rod for Electronic Applications1This standard is issued under the fixed designation F289; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year
2、of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers two grades of molybdenumwire less than 0.050 in. (1.27 mm) in diameter and one gradeof molybd
3、enum rod 1.00 in. (25.4 mm) or less in diameter asfollows:1.1.1 Grade 1Commercially pure molybdenum wire suit-able for leads, hooks, supports, heaters, and metal-to-glassseals.1.1.2 Grade 2Commercially pure molybdenum wire suit-able for mandrel either black or cleaned.1.1.3 Grade 3Commercially pure
4、molybdenum rod suit-able for leads, hooks, supports, and metal-to-glass seals.1.2 The term wire applies to all spooled or coiled materialand 0.050 in. (1.3 mm) or less in diameter and to short cutlengths 0.020 in. (0.51 mm) or less in diameter.1.3 The term rod applies to all material over 0.020 in.
5、(0.51mm) in diameter, supplied in straight lengths.1.4 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.1.5 This standard does not purport
6、 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 the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D374 T
7、est Methods for Thickness of Solid Electrical Insu-lation (Withdrawn 2013)3E8 Test Methods for Tension Testing of Metallic MaterialsE315 Test Methods for Chemical Analysis of Molybdenum(Withdrawn 2010)3F16 Test Methods for Measuring Diameter or Thickness ofWire and Ribbon for Electronic Devices and
8、LampsF205 Test Method for Measuring Diameter of Fine Wire byWeighingF219 Test Methods of Testing Fine Round and Flat Wire forElectron Devices and Lamps2.2 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)42.3 Military Standard:MIL-STD-129 Marking for Shipment and Storage (Mili
9、taryAgencies)43. Chemical Composition3.1 All grades of wire and rod shall be 99.90 % minimumpure molybdenum. The maximum allowable oxygen contentshall be 0.007 weight% , while the maximum carbon contentshall be 0.03 weight %.4. Mechanical Properties4.1 Tensile Properties:4.1.1 The tension test speci
10、mens and procedures shall con-form to Methods F219 for wire diameter up to and including0.010 in. (0.25 mm), and Test Methods E8 for all other wireand rod diameters.4.1.2 The tensile requirements of wire in sizes up to andincluding 0.020 in. (0.51 mm) in diameter shall conform to therequirements of
11、Table 1 and shall be calculated by dividing thebreaking load in grams-force by the size of the wire expressedin milligrams per 200 mm.4.1.3 The tensile requirements of wire in sizes over 0.020 in.(0.51 mm) up to 0.050 in. (1.3 mm) in diameter shall conformto the requirements of Table 2.4.1.4 The ten
12、sile requirements of rod shall be as agreedupon between the purchaser and the supplier.4.2 Ductility Properties:4.2.1 Wire up to 0.003 in. (0.08 mm) in diameter shall notbreak when subjected to the test prescribed in 11.4.1.1This specification is under the jurisdiction of ASTM Committee F01 onElectr
13、onics and is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved June 1, 2014. Published July 2014. Originally approvedin 1954. Last previous edition approved in 2009 as F289 96 (2009). DOI:10.1520/F0289-96R14.2For referenced ASTM standards, visit the ASTM
14、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 referenced onwww.astm.org.4Available from Standard
15、ization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2.2 Wire over 0.003 in. (0.08 mm) up to 0.020 in. (0.51mm) in diameter shall
16、not break or show cracks underobservation through a binocular microscope at 30 whensubjected to the test prescribed in 11.4.2.4.2.3 Wire over 0.020 in. (0.51 mm) in diameter shall notbreak or show cracks under unaided visual observation whensubjected to the test prescribed in 11.4.3.4.2.4 Rod shall
17、have ductility properties as agreed uponbetween the purchaser and the supplier.5. Surface Finish5.1 Molybdenum wire shall be furnished in the followingfinishes:5.1.1 As drawn, black, or5.1.2 As drawn, cleaned.5.2 Molybdenum rod shall be furnished in the followingfinishes:5.2.1 Black,5.2.2 Cleaned, o
18、r5.2.3 Centerless ground.5.3 Surfaces shall be smooth and free of contamination andpernicious surface defects.6. Dimensional Tolerances6.1 For wire in diameters up to and including 0.020 in. (0.51mm) in diameter the tolerance shall be 65 % of weight per 200mm. The size of wire shall be uniform for G
19、rades 1 and 3within 2 weight % as measured at both ends of the wire; andfor Grade 2 within 1 weight % within the total length of thewire. The standard size tolerance for wire in a diameter rangeof 0.020 to 0.030 in. (0.51 to 0.76 mm) is6 3 % by diameter;but such wire can be ordered by any of several
20、 weighttolerances (mg/200 mm) as agreed upon between the purchaserand the supplier.6.2 For black or cleaned rod in diameters over 0.020 in.(0.51 mm) and wire over 0.030 in. (0.76 mm) the toleranceshall be 63 % of the specified diameter.6.3 Out-of-roundness of wire over 0.005 in. (0.13 mm) indiameter
21、 and all rod except centerless ground shall be within4 % of the specified diameter, maximum.6.4 When centerless ground rod is specified, the diametershall meet the tolerances shown in Table 3.7. General Requirements7.1 The material shall be uniform in composition, crosssection, and in structural con
22、dition.7.2 Unless otherwise specified, all material shall be pro-vided in the stress-relief annealed condition (not recrystal-lized).8. Straightness8.1 When ordered as straightened, straightness of wire shallbe specified as the radius of curvature or camber of a givenlength of wire as agreed upon be
23、tween the purchaser and thesupplier.8.2 Rod and short cut lengths shall be straight to within18in. camber in 1 ft (or 3 mm camber in 300 mm) of length.NOTE 1The straightness criterion in terms of maximum permissiblecamber in an arbitrary length, L, is calculated as the product of the knownmaximum pe
24、rmissible camber in a specified length, L, and the square ofthe ratio of L to L. As an example, consider L to be 3 ft. In inch-poundunits, the maximum camber per 3-ft length = (18 in.) (31)2=118 in. In SIunits, the maximum camber per 760-mm length = (3 mm) (914300)2=28mm. The relation given constitu
25、tes an approximation valid for the purposeas long as L is not too large; the exact solution can be obtained byconsidering a circle with the camber in length L as one segment of adiametral chord perpendicularly bisecting a chord of length L.9. Coiling and Spooling9.1 The spools or bands shall be clea
26、n and free of seams orprojections that might catch or tangle the wire during unwind-ing. The wire shall be in one continuous length and woundsmoothly in layers, with no piling upon turns, so that itunwinds freely without forming kinks. Inner and outer endsshall be firmly attached to the spool or ban
27、d by suitable means.The spool shall be shipped in a container that will preventcontamination of the wire. Ninety percent of the spools in ashipment of one size shall contain not less than 150 m for sizesup to and including 0.006 in. (0.15 mm) in diameter, and notless than 100 m for sizes in the rang
28、e over 0.006 to 0.012 in.(over 0.15 to 0.30 mm) in diameter. No spools or bands shallTABLE 1 Tensile RequirementsWire Size,mg/200 mmMaximum Diameter,Ain. (mm)Minimum Tensile Breaking Load,gf/(mg/200 mm)Elongation in 10 in.(250 mm), %Grade 1 Grade 2Up to 4.11, incl 0.0020 (0.051) 50 6 #6Over 4.11 to
29、6.42, incl 0.0025 (0.064) 46 6 #6Over 6.42 to 10.53, incl 0.0032 (0.081) 44 6 #6Over 10.53 to 411.2, incl 0.020 (0.51) 40 6 #6AWire diameter, in. = 9.86 104weight in mg/200 mm.TABLE 2 Tensile RequirementWire Diameter, in.(mm)Minimum TensileStrength, psi(MPa)Elongation in 10 in.(250 mm), %Class1, min
30、Class2, maxOver 0.020 (0.51)to 0.050 (1.27)64 000 (441) 6 6TABLE 3 Centerless-Ground Rod Diameter TolerancesSpecified Diameter, in. (mm)Permissible Variation inDiameter, plus or minus, in.(mm)Over 0.020 (0.51) to 0.060 (1.53), incl 0.001 (0.025)Over 0.060 (1.54) to 0.500 (12.70), incl 0.002 (0.050)O
31、ver 0.500 (12.71) to 1.00 in. (25.4), incl 0.003 (0.075)F289 96 (2014)2be filled higher than116 in. (1.6 mm) from the top of the flange.The size of spool, band, or coil shall be as agreed upon betweenthe purchaser and the supplier.10. Sampling10.1 The sample selected for testing shall be representat
32、iveof the material and form and shall not be contaminated by thesampling procedure.10.2 Specific sampling procedures shall be agreed uponbetween the purchaser and the supplier.11. Test Methods11.1 General Appearance and FinishCheck by visualinspection at 10 magnification.11.2 Molybdenum ContentDeter
33、mine gravimetrically orby a combination of analysis for impurities by spectrochemicaland chemical methods. Impurity levels shall be as agreed uponbetween the purchaser and the supplier. In case ofdisagreement, Test Methods E315 shall be used as the refereemethod.11.3 Tensile StrengthDetermine tensil
34、e properties in ac-cordance with Test Methods F219 for wire diameters up to0.010 in. (0.25 mm), and Test Methods E8 for all other wireand rod diameters.11.4 DuctilityUse the ductility test appropriate to the wirediameter (see 4.2 for requirements): up to 0.003 in. (0.08 mm),knife-edge test (11.4.1);
35、 from 0.003 to 0.020 in. (0.08 to 0.51mm), inclusive, mandrel test (11.4.2); and for wire larger than0.020 in. (0.51 mm) but smaller than 0.050 in. (1.3 mm), bendtest (11.4.2).11.4.1 Knife-Edge Ductility TestUsing at least 10 ft (or 3m) of wire, with the spool or band in one hand and a knife inthe o
36、ther, grasp the wire between the thumb and the edge of theknife blade. Incline the knife blade at about 45 to the wirewith the back of the blade positioned away from the spool orband. Apply pressure with the thumb on the wire and knifeblade and draw the latter along the free length of the wire at ar
37、ate of about 3 ft/s (or 1 m/s).Apply pressure sufficient to formthe wire into a continuous tight helix less than316 in. (4 mm)in outside diameter when the tension is released.11.4.2 Mandrel Ductility TestClamp one end of a mandrelof diameter 112 times the diameter of the wire to be tested ina bench
38、vise. Grasp one end of a 10-in. (250-mm) wirespecimen in each hand and bend it in a plane perpendicular tothe mandrel so as to wind tightly one wrap around the mandrel.Unwind in approximately the same plane, and then pull it tosubstantial straightness.11.4.3 Bend Ductility TestClamp one end of a man
39、drel ofdiameter 212 times the diameter of the wire to be tested in abench vise. Coil wire around the mandrel, making sure that thespace between turns is not greater than the diameter of thewire. Form a minimum of 20 turns around the mandrel.11.5 Dimensions of WireDetermine wire dimensions asfollows:
40、11.5.1 Determine dimensions other than out-of-roundness inaccordance with Test Method F205 for wire up to andincluding 0.020 in. (0.51 mm) in diameter and Test MethodsF16 for wire over 0.020 in. (0.51 mm) to 0.050 in. (1.3 mm),inclusive, in diameter.11.5.2 Determine out-of-roundness in accordance wi
41、th TestMethods F219.NOTE 2Methods F219 incorporates references to Test Methods D374.12. Inspection12.1 Unless otherwise specified in the purchase contract, thesupplier is responsible for the performance of all inspectionrequirements specified herein.12.2 If the purchaser desires that his representat
42、ive inspector witness the inspection and testing of the product prior toshipment, such agreement shall be made between the purchaserand the supplier as part of the purchase contract.13. Rejection and Rehearing13.1 Material that fails to conform to the requirements ofthis specification may be rejecte
43、d. Rejection should be reportedto the supplier promptly and in writing. In case of dissatisfac-tion with the results of the test, the supplier may make claimfor a rehearing.13.2 Any spool of wire or individual cut piece that does notconform to the specified requirements may be rejected. If 15 %or mo
44、re of the spools of wire or cut pieces in any shipment donot conform to the specified requirements, the entire shipmentmay be rejected.13.3 When agreement on rejection is established, the pur-chaser shall return rejected material in a suitable container forshipping, using the original container if p
45、ossible, so that thewire or rod may arrive at the suppliers plant in the samecondition as it left.14. Product Marking14.1 Each spool, band, coil, container of straight lengths, orrod shall be identified with the name of the supplier and the lotnumber, size and quantity of material, date of shipment
46、or dateof manufacture, grade, and finish. In addition, each container ofspools, bands, coils, or straight lengths shall contain thepurchasers order number.14.2 Special marking and packaging requirements shall beas agreed upon between the purchaser and the supplier.14.2.1 For civilian Federal agencie
47、s, markings for shipmentshall be in accordance with Fed. Std. No. 123, and for militaryagencies, in accordance with MIL-STD-129.15. Keywords15.1 electronic applications; molybdenum; molybdenumwire and rod; stress-relief annealed conditionF289 96 (2014)3ASTM International takes no position respecting
48、 the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standar
49、d is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Comm
