1、Designation: F 289 96 (Reapproved 2002)Standard Specification forMolybdenum Wire and Rod for Electronic Applications1This standard is issued under the fixed designation F 289; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number 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 two grades of molybdenumwire less than 0.050 in. (1.27 mm) in diameter and one gradeof
3、 molybdenum 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 3Commerciall
4、y pure 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 0.0
5、20 in. (0.51mm) in diameter, supplied in straight lengths.1.4 The values stated in inch-pound units are to be regardedas the standard. The metric equivalents of inch-pound unitsmay be approximate, except for the size of the wire expressedin milligrams per 200 mm.1.5 This standard does not purport to
6、 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:D 374 Test
7、 Methods for Thickness of Solid ElectricalInsulation2E 8 Test Methods of Tension Testing of Metallic Materials3E 315 Test Methods for Chemical Analysis of Molybde-num4F 16 Test Methods for Measuring Diameter or Thickness ofWire and Ribbon for Electronic Devices and Lamps5F 205 Test Method for Measur
8、ing Diameter of Fine Wire byWeighing5F 219 Test Methods of Testing Fine Round and Flat Wire forElectron Devices and Lamps52.2 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)62.3 Military Standard:MIL-STD-129 Marking for Shipment and Storage (MilitaryAgencies)63. Chemical Com
9、position3.1 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 specimens and procedures shall con
10、-form to Methods F 219 for wire diameter up to and including0.010 in. (0.25 mm), and Test Methods E 8 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 Table 1 and shall be calcul
11、ated 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 tensile requirements of rod sh
12、all 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 11.4.1.4.2.2 Wire over 0.003 in. (0.08 mm) up to 0.020 in. (0.51mm) in diameter shall not break or show cracks
13、 underobservation through a binocular microscope at 303 whensubjected to the test prescribed in 11.4.2.4.2.3 Wire over 0.020 in. (0.51 mm) in diameter shall not1This specification is under the jurisdiction of ASTM Committee F01 onElectronics, and is the direct responsibility of Subcommittee F01.03 o
14、n MetallicMaterials.Current edition approved June 10, 1996. Published August 1996. Originallypublished as B 289 54 T; redesignated F 289 in 1956. Last previous editionF 289 81 (1991).2Annual Book of ASTM Standards, Vol 10.01.3Annual Book of ASTM Standards, Vol 03.01.4Annual Book of ASTM Standards, V
15、ol 03.05.5Annual Book of ASTM Standards, Vol 10.04.6Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.bre
16、ak or show cracks under unaided visual observation whensubjected to the test prescribed in 11.4.3.4.2.4 Rod shall 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
17、.1.2 As drawn, cleaned.5.2 Molybdenum rod shall be furnished in the followingfinishes:5.2.1 Black,5.2.2 Cleaned, or5.2.3 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
18、 in. (0.51mm) in diameter the tolerance shall be 65 % of weight per 200mm. The size of wire shall be uniform for Grades 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 diamet
19、er 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 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
20、 toleranceshall be 63 % of the specified diameter.6.3 Out-of-roundness of wire over 0.005 in. (0.13 mm) indiameter 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 Ta
21、ble 3.7. General Requirements7.1 The material shall be uniform in composition, crosssection, and in structural condition.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, stra
22、ightness of wire shallbe specified as the radius of curvature or camber of a givenlength of wire as agreed upon between 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
23、 terms of maximum permissiblecamber in an arbitrary length, L8, is calculated as the product of the knownmaximum permissible camber in a specified length, L, and the square ofthe ratio of L8 to L. As an example, consider L8 to be 3 ft. In inch-poundunits, the maximum camber per 3-ft length = (18 in.
24、) (31)2=118 in. In SIunits, the maximum camber per 760-mm length = (3 mm) (914300)2=28mm. The relation given constitutes an approximation valid for the purposeas long as L8 is not too large; the exact solution can be obtained byconsidering a circle with the camber in length L8 as one segment of adia
25、metral chord perpendicularly bisecting a chord of length L8.9. Coiling and Spooling9.1 The spools or bands shall be clean 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
26、 turns, so that itunwinds freely without forming kinks. Inner and outer endsshall be firmly attached to the spool or band 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 le
27、ss 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 range over 0.006 to 0.012 in.(over 0.15 to 0.30 mm) in diameter. No spools or bands shallbe filled higher than116 in. (1.6 mm) from the top of the flange.The size of spool, band, or co
28、il shall be as agreed upon betweenthe purchaser and the supplier.10. Sampling10.1 The sample selected for testing shall be representativeof the material and form and shall not be contaminated by thesampling procedure.TABLE 1 Tensile RequirementsWire Size,mg/200 mmMaximum Diameter,Ain. (mm)Minimum Te
29、nsile 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 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 3 104=weight in
30、 mg/200 mm.TABLE 2 Tensile RequirementWire Diameter, in.(mm)Minimum TensileStrength, psi(MPa)Elongation in 10 in.(250 mm), %Class1, minClass2, 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 inDiame
31、ter, 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)Over 0.500 (12.71) to 1.00 in. (25.4), incl 0.003 (0.075)F 289210.2 Specific sampling procedures shall be agreed uponbetween the purchaser and the supplier.11. Test M
32、ethods11.1 General Appearance and FinishCheck by visualinspection at 103 magnification.11.2 Molybdenum ContentDetermine gravimetrically orby a combination of analysis for impurities by spectrochemicaland chemical methods. Impurity levels shall be as agreed uponbetween the purchaser and the supplier.
33、 In case of disagree-ment, Test Methods E 315 shall be used as the referee method.11.3 Tensile StrengthDetermine tensile properties in ac-cordance with Test Methods F 219 for wire diameters up to0.010 in. (0.25 mm), and Test Methods E 8 for all other wireand rod diameters.11.4 DuctilityUse the ducti
34、lity test appropriate to the wirediameter (see 4.2 for requirements): up to 0.003 in. (0.08 mm),knife-edge test (11.4.1); 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.
35、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 other, 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 orb
36、and. Apply pressure with the thumb on the wire and knifeblade and draw the latter along the free length of the wire at arate 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.
37、4.2 Mandrel Ductility TestClamp one end of a mandrelof diameter 112 times the diameter of the wire to be tested ina bench 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
38、approximately the same plane, and then pull it tosubstantial straightness.11.4.3 Bend Ductility TestClamp one end of a mandrel 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 diam
39、eter of thewire. Form a minimum of 20 turns around the mandrel.11.5 Dimensions of WireDetermine wire dimensions asfollows:11.5.1 Determine dimensions other than out-of-roundness inaccordance with Test Method F 205 for wire up to andincluding 0.020 in. (0.51 mm) in diameter and Test MethodsF 16 for w
40、ire 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 with TestMethods F 219.NOTE 2Methods F 219 incorporates references to Test MethodsD 374.12. Inspection12.1 Unless otherwise specified in the purchase contract, thesupplier is res
41、ponsible for the performance of all inspectionrequirements specified herein.12.2 If the purchaser desires that his representative 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 c
42、ontract.13. Rejection and Rehearing13.1 Material that fails to conform to the requirements ofthis specification may be rejected. 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.1
43、3.2 Any spool of wire or individual cut piece that does notconform to the specified requirements may be rejected. If 15 %or more 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 est
44、ablished, the pur-chaser shall return rejected material in a suitable container forshipping, using the original container if possible, 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 length
45、s, orrod shall be identified with the name of the supplier and the lotnumber, size and quantity of material, date of shipment or dateof manufacture, grade, and finish. In addition, each container ofspools, bands, coils, or straight lengths shall contain thepurchasers order number.14.2 Special markin
46、g and packaging requirements shall beas agreed upon between the purchaser and the supplier.14.2.1 For civilian Federal agencies, 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; moly
47、bdenum; molybdenumwire and rod; stress-relief annealed conditionF 2893ASTM International takes no position respecting 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 a
48、ny such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard 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
49、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 Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual repri
