1、Designation: F 364 96 (Reapproved 2002)Standard Specification forMolybdenum Flattened Wire for Electron Tubes1This standard is issued under the fixed designation F 364; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of la
2、st 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 types of molybdenumflattened wire up to 0.050 in. (1.27 mm) thick and up to 0.375in. (9.5
3、2 mm) 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 the standard. The values given in parentheses are forinformation only.1.3 The following safety hazards caveat pertains only to thetest m
4、ethod 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 appropriate safety and healthpractices and determine the applicability of regulator
5、y limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:E 18 Test Methods for Rockwell Hardness and RockwellSuperficial Hardness of Metallic Materials2E 315 Test Methods for Chemical Analysis of Molybde-num3E 384 Test Method for Microhardness of Materials23. Classification3.1 Two types
6、 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-temperature material having the compositionlimits prescribed in Table 1 and s
7、hall 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:4.1.1 Quantity of each size,4.1.2 Dimensions or size (see 8.1),4.1.3 Ed
8、gewise 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 made by any appropriate process.NOTE 1It has been found that molybdenum
9、 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 materials shall be analyzed in accordance with TestMethods E 315 or other
10、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 following classifications of temper:7.1.1 HardAs-rolled, not stress-relieved,
11、 suitable forspring applications, or7.1.2 Stress-RelievedSuitable for bending or winding.1This specification is under the jurisdiction of ASTM Committee F01 onElectronics and is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved June 10, 1996. Published Au
12、gust 1996. Originallypublished as F 364 73 T. Last previous edition F 364 77 (1991).2Annual Book of ASTM Standards, Vol 03.01.3Annual Book of ASTM Standards, Vol 03.01.TABLE 1 Chemical CompositionElementComposition, max, ppmType IUNS R03604Type IIUNS R03603Carbon 50 15Oxygen 80 175Nitrogen 20 10Hydr
13、ogen 10 10Aluminum 150 150Calcium 50 50Silicon 100 350Iron 100 100Tungsten 200 200Potassium 150 150Tin 25 25Other elements, each 50 50min % by differenceMolybdenum 99.90 99.901Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 The ha
14、rdness test (see 10.1) is to be used as the criterionfor identifying hard and stress-relieved materials in accordancewith Table 2.7.2.1 When determining microhardness using light loads,the thickness and load relationships shown in Table 3 arerecommended for best correlation and reproducibility.7.3 B
15、end 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 and Delamination (Type II Wire in H
16、ard 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 2Type II material will show little
17、 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 Variations8.1 The dimensional toler
18、ances 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 flattened wires may be either a ma
19、tteor 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 with Test Method E 384. Recommended
20、loads are shownin Table 3. For material316 in. (4.8 mm) wide and over,Rockwell superficial hardness may be measured in accordancewith Test Methods E 18 as an alternative test.10.2 Bend and Delamination:10.2.1 Perform the test with the wire at a temperature in therange 65F (18C) to 86F (30C), inclusi
21、ve.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 substantial straightness.10.2.3 Examine
22、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 rejected. If 15 % or more of the sp
23、ools orcoils in any shipment do not conform to the specified require-ments, the shipment does not conform to this specification andwill be rejected, and the supplier shall be notified within 30days after receipt of material.11.2 On agreement by seller and purchaser, the purchasershall return rejecte
24、d 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 made the basis ofacceptance of th
25、e 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 beensampled, tested, and inspected in accordance with the provi-sions of the specification. Each certification so furnished shallbe
26、 signed by an authorized agent of the seller or manufacturer.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,
27、tare, and net weight or number of feet ormetres on spool,TABLE 2 Hardness RangesTemperDiamond PyramidHardness (HDP)or Vickers Hard-ness (HV)Rockwell Super-ficial Hardness30T-ScaleAHardStress-relieved300 and overup to 300, excl85 and overup to 85, exclARockwell 30T for material 3/16 in. (4.8 mm) wide
28、 and over only.TABLE 3 Thickness and Load for Determination of DiamondPyramid Hardness or Vickers HardnessThickness, in. (mm) Load, gfLess than 0.003 (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 TolerancesSp
29、ecified 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),incl0.0003 (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
30、 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), 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)F 364213.1.6 Thickness and width of flat wire
31、,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; molybdenum flattenedwire; UNS R03604; UNS R03603AST
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35、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 obtained 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).F 3643
