1、Designation: F85 76 (Reapproved 2018)Standard Practice forNomenclature for Wire Leads Used as Conductors inElectron Tubes1This standard is issued under the fixed designation F85; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the
2、year of last 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 practice covers rules for designating one, two, orthree-piece round wire leads used as conductors through
3、 glassseals in electron tubes. Stranded leads and leads for semicon-ductors are excluded.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associ
4、ated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally reco
5、gnized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B127 Specification f
6、or Nickel-Copper Alloy (UNS N04400)Plate, Sheet, and StripB160 Specification for Nickel Rod and BarF15 Specification for Iron-Nickel-Cobalt Sealing AlloyF29 Specification for Dumet Wire for Glass-to-Metal SealApplicationsF30 Specification for Iron-Nickel Sealing AlloysF290 Specification for Round Wi
7、re for Winding ElectronTube Grid Laterals3. Dimensioning3.1 DiameterThe diameter shall be expressed in millime-tres. Three digits shall be used for all diameters under 1 mmand four or more digits shall be used for all diameters 1 mmand larger. A decimal point is understood to be present threeplaces
8、from the right.3.2 LengthThe length shall be expressed in millimetresusing any number of digits.NOTE 1All fractions shall be expressed in millimetres as decimals.3.3 Conventions The diameter shall always precede andbe separated from the length by the letter“ x”. For example, awire 13 mm long and 0.5
9、08 mm in diameter will be referred toas 508 x 13.4. Nomenclature4.1 The nomenclature for designating a lead shall consist ofone, two, or three parts; for one-, two-, or three-piece leads,respectively. Each of these parts shall specify for its piece thediameter in millimetres, the length in millimetr
10、es, and thematerial (see Section 4). The order for designating the compo-nent pieces shall be: ( 1) the inner lead section, (2) the press ofseal section, and (3) the outer lead section.4.1.1 Each portion of the designation shall be separated bya dash (), for example,508x13FeCuC40406x2D1016x8NiPtd,co
11、rresponding to Inner LeadPress LeadOuter Lead,respectively.4.1.2 One-, two-, or three-piece leads shall be designatedaccording to the typical examples listed in Table 1.5. Materials5.1 The material for a component lead section is generallydesignated by use of its chemical symbol. A numerical suffix
12、atthe end of the material designation preceded by “C” (coating)indicates percent of cladding or plating. For unspecified alloys,a numerical value between chemical symbols indicates thepercent content of the material preceding the value.5.2 Additional descriptive suffixes are given in Table 2.5.3 Mat
13、erials List Commonly used lead wire materialsand their respective designations are listed in Table 3. Wheretrade names are indicated, equivalent materials may be used.1This practice is under the jurisdiction of ASTM Committee F01 on Electronicsand is the direct responsibility of Subcommittee F01.03
14、on Metallic Materials, WireBonding, and Flip Chip.Current edition approved March 1, 2018. Published April 2018. Originallyapproved in 1967. Last previous edition approved in 2013 as F85 - 76 (2013). DOI:10.1520/F0085-76R18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orconta
15、ct ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standa
16、rd was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.4 Ann
17、ealing TreatmentsFor special applications it issometimes desirable to have the entire lead, or certain parts,with an extremely soft temper. To satisfy these conditions,standard treatments are available as follows:5.4.1 Anneal Types:5.4.1.1 Entire Lead Anneal (No. 1) Entire leads involvingnickel and
18、copper are annealed at a temperature suitable forannealing copper but below the annealing point for nickel.After annealing, the leads are put through a straighteningprocess to recondition any leads which become distortedduring the anneal.5.4.1.2 Entire Lead Anneal (No. 1A) This is the sameprocess as
19、 No. 1 anneal except the final straightening operationis omitted.5.4.1.3 Hook Anneal (No. 2)This process anneals only thehook on finished leads.5.4.1.4 Outer Lead Anneal (No. 3)The outer and pressleads are annealed as a unit before welding to the inner lead.This applies only to handmade leads.5.4.1.
20、5 Inner Lead Anneal (No. 4)The inner lead is givena special anneal before welding to the press and outer leadparts. This applies only to handmade leads.5.4.1.6 Outer Lead (Wire Anneal) (No. 5)The outer wire isgiven a special anneal while in wire form, prior to cutting intolead components. This most
21、generally applies to 1.016 and1.270-mm nickel-plated copper being used on machine-madeleads.5.4.1.7 Special Anneal (No. 6)Any annealing treatmentdesired, which is not covered by any of the foregoing, shouldbe accompanied by a detailed explanation on the order.5.4.1.8 Entire Lead Anneal (No. 7) The e
22、ntire lead isannealed similar to the No. 1 anneal, except at a highertemperature suitable for annealing nickel. This temperature isabove the melting point for copper. Therefore, this anneal isunsuitable for a complete lead having copper parts.5.4.2 When annealed lead wires are required, they should
23、bedesignated by the symbol number for the annealing treatmentdesired, preceded by“ A” and enclosed in parentheses andplaced last in the designation, for example,889x11NiSCorr406x4D635x84Cu(A2).5.4.3 For a three-part lead, when the inner and outer leadsrequire different anneals the inner lead anneal
24、is listed first,followed by the outer lead anneal, for example,2032x90NiS813x7 D1270x85NiC10 (A4, A5).6. Keywords6.1 annealing conditions; electron tubes; wire leadsglasssealsTABLE 1 Designation for One, Two, or Three-Piece LeadsNo. ofSectionsLead Wire DesignationComponent SectionsInner lead Press o
25、f Seal Lead Outer LeadDia LengthMaterialADia LengthMaterialADia LengthMaterialAmm mm mm mm mm mm1 1524x21D . . . 1.524 21 D . . .2 1016x25Ni1524x14D1.016 25 Ni 1.524 14 D . . .3 508x13FeCuC40406x2D1016x8NiPtd0.508 13 FeCuC40 0.406 2 D 1.016 8 NiPtdASee 5.3 and Table 3 for interpretation of designati
26、ons.TABLE 2 Descriptive Suffixes for DesignationsSuffix DescriptionA anneal condition (see 5.4)S degassedHd hard (no symbol if material is soft)Ptd pointed tipFlk flick off leadC coating applied by plating or claddingHK hook leadHKCORR corrugated hook leadExamples:CuHdCooper hardNiCuC20Nickel, coate
27、d 20 % with copperFeCuC40Steel, coated 40 % with copperTABLE 3 Commonly Used Lead Wire MaterialsMaterial DesignationAluminum AlCopper CuCopper, nickel-coated CuNiCDumet, medium borate, Specification F29 DDumet, dark borate, Specification F29 DDDumet, light borate, Specification F29 DLDumet, unborate
28、d, Specification F29 DUMolybdenum MoMonel 440, Specification B127 MlNickel 200, Specification B160 NiNickel 200, degassified, Specification B160 NiSNickel 211, Specification F290 NiDNickel 211, degassified, Specification F290 NiDSNickel-silver, coated NiAgCNickel, copper-coated NiCuCIron nickel, 52
29、Alloy, Specification F30 NiFeNickel-silver Alloy CuNiZnIron-nickel-cobalt Alloy, Specification F15 NiFeCoSilver AgSteel, low carbon FeSteel, nickel-coated FeNiCSteel, copper-coated FeCuCPlatinum PtTungsten WSilicon bronze alloy CuSiF85 76 (2018)2ASTM International takes no position respecting the va
30、lidity 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 standard is su
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32、arters. 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 stand
33、ard 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). 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:/ 76 (2018)3
