1、Designation: F364 96 (Reapproved 2014)Standard Specification forMolybdenum Flattened Wire for Electron Tubes1This standard is issued under the fixed designation F364; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers two types of molybdenumflattened wire up to 0.050 in. (1.27 mm) thick and up to 0.375in. (9.52 m
3、m) wide, specifically for use in electron tubes. Thetwo grades have UNS numbers R03604 and R03603.1.2 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 conside
4、red standard.1.3 The following safety hazards caveat pertains only to thetest method described in this specification (see 10.2). Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appr
5、opriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2E18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE315 Test Methods for Chemical Analysis of Molybdenum(Withdrawn 2010)3E384 Test Method fo
6、r Knoop and Vickers Hardness ofMaterials3. Classification3.1 Two types of molybdenum flattened wire are covered bythis specification:3.1.1 Type I, UNS R03604This type shall have the com-position limits prescribed in Table 1.3.1.2 Type II, UNS R03603This type shall be a high-recrystallization-tempera
7、ture material having the compositionlimits prescribed in Table 1 and shall be capable of retaining itsductility after firing at a temperature of 2375 6 25F (1300 614C) for at least 20 min.4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4
8、.1.1 Quantity of each size,4.1.2 Dimensions or size (see 8.1),4.1.3 Edgewise curvature (camber) if required (see 8.2),4.1.4 Type (see 3.1),4.1.5 Temper (see 7.1), and4.1.6 How furnished (coils, spools, etc.).5. Materials and Manufacture5.1 The molybdenum wires covered by this specificationshall be m
9、ade by any appropriate process.NOTE 1It has been found that molybdenum wire made by the powdermetallurgy process will meet the requirements of this specification.6. Chemical Composition6.1 Type I and Type II molybdenum wire shall conform tothe chemical compositions prescribed in Table 1.6.2 The mate
10、rials shall be analyzed in accordance with TestMethods E315 or other appropriate ASTM methods whenavailable. Other methods, as mutually agreed upon betweenseller and purchaser, may be employed.7. Physical Properties7.1 TemperMaterial under this specification shall be sup-plied in one of the followin
11、g classifications of temper:7.1.1 HardAs-rolled, not stress-relieved, suitable forspring applications, or7.1.2 Stress-Relieved Suitable for bending or winding.7.2 The hardness test (see 10.1) is to be used as the criterionfor identifying hard and stress-relieved materials in accordancewith Table 2.7
12、.2.1 When determining microhardness using light loads,the thickness and load relationships shown in Table 3 arerecommended for best correlation and reproducibility.1This specification is under the jurisdiction of ASTM Committee F01 onElectronics and is the direct responsibility of Subcommittee F01.0
13、3 on MetallicMaterials.Current edition approved June 1, 2014. Published July 2014. Originally approvedin 1973. Last previous edition approved in 2009 as F364 96 (2009). DOI:10.1520/F0364-96R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at se
14、rviceastm.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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken,
15、 PA 19428-2959. United States17.3 Bend and Delamination (Type I and Type II Wire inStress-Relieved Temper)In the as-received condition (nofiring), this wire shall show no evidence of cracking, splitting,delamination, or splintering when subjected to the bend anddelamination test (see 10.2).7.4 Bend
16、and Delamination (Type II Wire in Hard andStress-Relieved Tempers)After firing Type II material at atemperature of 2375 6 25F (1300 6 14C) for at least 20 min,it shall show no evidence of cracking, splitting, delamination,or splintering when subjected to the bend and delamination test(see 10.2).NOTE
17、 2Type II material will show little or no evidence of recrystal-lization after firing as prescribed in 7.4. This may be determined bymicrostructural comparison of a fired and an unfired specimen, displayinga longitudinal section, from the same spool or coil of material.8. Dimensions and Permissible
18、Variations8.1 The dimensional tolerances shall be in accordance withTable 4.8.2 Edgewise curvature (camber), if specified, shall bemeasured in inches (or millimetres) per unit length and shall beas agreed upon between purchaser and seller.9. Workmanship, Finish, and Appearance9.1 The finish of these
19、 flattened wires may be either a matteor shiny surface, and shall be smooth, free of dirt, oxides, pits,scratches, seams, stains, scale, delamination, splits, slivers, orany other defects not considered good commercial finish.10. Test Methods10.1 HardnessHardness shall be determined in accor-dance w
20、ith Test Method E384. Recommended loads are shownin Table 3. For material316 in. (4.8 mm) wide and over,Rockwell superficial hardness may be measured in accordancewith Test Methods E18 as an alternative test.10.2 Bend and Delamination:10.2.1 Perform the test with the wire at a temperature in therang
21、e 65F (18C) to 86F (30C), inclusive.10.2.2 Wind the wire in close turns on a cylindrical mandrelwhose diameter is approximately twice the thickness of thewire. Unwind the wire in approximately the same plane as itwas originally wound, perpendicular to the axis of the mandrel.Pull the wire to substan
22、tial straightness.10.2.3 Examine the wire visually (Note 3) for evidence ofcracking, splitting, delamination, and splintering.NOTE 3Visual examination, unaided except for normal visual correc-tion shall be used.11. Rejection11.1 Any spool or coil not conforming to the specifiedrequirements may be re
23、jected. If 15 % or more of the spools orcoils in any shipment do not conform to the specifiedrequirements, the shipment does not conform to this specifica-tion and will be rejected, and the supplier shall be notifiedwithin 30 days after receipt of material.11.2 On agreement by seller and purchaser,
24、the purchasershall return rejected material in a suitable container forshipping, the original if possible, so that it may arrive at themanufacturers plant in the same condition as it left.12. Certification12.1 When agreed upon in writing between the purchaserand the seller, a certification shall be
25、made the basis ofacceptance of the material. This shall consist of a copy of themanufacturers test report or a statement by the seller, accom-panied by a copy of the test results, that the material has beenTABLE 1 Chemical CompositionElementComposition, max, ppmType IUNS R03604Type IIUNS R03603Carbo
26、n 50 15Oxygen 80 175Nitrogen 20 10Hydrogen 10 10Aluminum 150 150Calcium 50 50Silicon 100 350Iron 100 100Tungsten 200 200Potassium 150 150Tin 25 25Other elements, each 50 50min % by differenceMolybdenum 99.90 99.90TABLE 2 Hardness RangesTemperDiamond PyramidHardness (HDP)or Vickers Hard-ness (HV)Rock
27、well Super-ficial Hardness30T-ScaleAHardStress-relieved300 and overup to 300, excl85 and overup to 85, exclARockwell 30T for material316 in. (4.8 mm) wide and over only.TABLE 3 Thickness and Load for Determination of DiamondPyramid Hardness or Vickers HardnessThickness, in. (mm) Load, gfLess than 0.
28、003 (0.08) 1000.003 to 0.0050 (0.08 to 0.127), incl 200Over 0.050 to 0.100 (0.127 to 2.54), incl 500Over 0.100 (2.54) 1000TABLE 4 Dimensional TolerancesSpecified Thickness,in. (mm)Toleranceplus and mi-nus, in. (mm)Up to 0.0050 (0.127), incl 0.0002 (0.005)Over 0.0050 to 0.0100 (0.127 to 0.254),incl0.
29、0003 (0.008)Over 0.0100 to 0.0200 (0.254 to 0.508),incl0.0004 (0.010)Over 0.0200 to 0.0300 (0.508 to 0.762),incl0.0005 (0.013)Over 0.0300 to 0.0500 (0.762 to 1.270),incl0.0010 (0.025)Specified Width, in. (mm)Tolerance plusand minus, in.(mm)Up to 0.025 (0.64), inclOver 0.025 to 0.075 (0.64 to 1.90),
30、inclOver 0.075 to 0.125 (1.90 to 3.18), inclOver 0.125 (3.18)0.001 (0.02)0.002 (0.05)0.003 (0.08)0.005 (0.13)F364 96 (2014)2sampled, tested, and inspected in accordance with the provi-sions of the specification. Each certification so furnished shallbe signed by an authorized agent of the seller or m
31、anufacturer.13. Product Marking13.1 Each coil or spool shall be legibly marked with the:13.1.1 Type of material, and temper,13.1.2 Name of manufacturer,13.1.3 Heat, lot, or manufacturers identification number,13.1.4 Specification number,13.1.5 Gross, tare, and net weight or number of feet ormetres o
32、n spool,13.1.6 Thickness and width of flat wire,13.1.7 Shipping date, and13.1.8 Inspectors number or designation.14. Packaging and Package Marking14.1 Packaging shall be adequate to protect coils and spoolsfrom contamination or damage during shipment.15. Keywords15.1 electron tubes; molybdenum; moly
33、bdenum flattenedwire; UNS R03604; UNS R03603ASTM 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 any such patent rights, and
34、 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 invited either for revisio
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36、uldmake 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 reprints (single or multiple copies) of this standard may be obta
37、ined by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 96 (2014)3
