1、Designation: F 85 76 (Reapproved 2002)Standard Practice forNomenclature for Wire Leads Used as Conductors inElectron Tubes1This standard is issued under the fixed designation F 85; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, th
2、e year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon (e) 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 thro
3、ugh glassseals in electron tubes. Stranded leads and leads for semicon-ductors are excluded.1.2 This standard does not purport 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 pract
4、ices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:B 127 Specification for Nickel-Copper Alloy (UNSN04400) Plate, Sheet, and Strip2B 160 Specification for Nickel Rod and Bar2F 15 Specification for Iron-Nickel-Cobalt Sealing Alloy3F
5、29 Specification for Dumet Wire for GlasstoMetal SealApplications3F 30 Specification for Iron-Nickel Sealing Alloys3F 290 Specification for Round Wire for Winding ElectronTube Grid Laterals33. Dimensioning3.1 DiameterThe diameter shall be expressed in millime-tres. Three digits shall be used for all
6、 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 from the right.3.2 LengthThe length shall be expressed in millimetresusing any number of digits.NOTE 1All fractions shall be expressed in millimetres a
7、s decimals.3.3 ConventionsThe diameter shall always precede andbe separated from the length by the letter“ x”. For example, awire 13 mm long and 0.508 mm in diameter will be referred toas 508x13.4. Nomenclature4.1 The nomenclature for designating a lead shall consist ofone, two, or three parts; for
8、one-, two-, or three-piece leads,respectively. Each of these parts shall specify for its piece thediameter in millimetres, the length in millimetres, 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, a
9、nd (3) the outer lead section.4.1.1 Each portion of the designation shall be separated bya dash (), for example,508x13FeCuC40406x2D1016x8NiPtd,corresponding to Inner LeadPress LeadOuter Lead,respectively.4.1.2 One-, two-, or three-piece leads shall be designatedaccording to the typical examples list
10、ed in Table 1.5. Materials5.1 The material for a component lead section is generallydesignated by use of its chemical symbol. A numerical suffix atthe end of the material designation preceded by “C” (coating)indicates percent of cladding or plating. For unspecified alloys,a numerical value between c
11、hemical symbols indicates thepercent content of the material preceding the value.5.2 Additional descriptive suffixes are given in Table 2.5.3 Materials ListCommonly used lead wire materialsand their respective designations are listed in Table 3. Wheretrade names are indicated, equivalent materials m
12、ay be used.5.4 Annealing 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 inv
13、olvingnickel and copper are annealed at a temperature suitable forannealing copper but below the annealing point for nickel.1This practice is under the jurisdiction of ASTM Committee F01 on Electronicsand is the direct responsibility of Subcommittee F01.03 on Metallic Materials.Current edition appro
14、ved Dec. 10, 2002. Published May 2003. Originallyapproved in 1967. Last previous edition approved in 1997 as F 85-76 (1997)e1.2Annual Book of ASTM Standards, Vol 02.04.3Annual Book of ASTM Standards, Vol 10.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1
15、9428-2959, United States.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 No. 1 anneal except the final straightening operationis omitted.5.4.1.3 Hook Annea
16、l (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.5.4.1.5 Inner Lead Anneal (No. 4)The inner lead is givena special anneal before welding t
17、o the press and outer leadparts. This applies only to handmade leads.5.4.1.6 Outer Lead (Wire Anneal) (No. 5)The outer wireis given a special anneal while in wire form, prior to cuttinginto lead components. This most generally applies to 1.016 and1.270-mm nickel-plated copper being used on machine-m
18、adeleads.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 entire lead isannealed similar to the No. 1 anneal, except at a highertemperature sui
19、table 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 bedesignated by the symbol number for the annealing treatmentdesired, preceded by“ A
20、” 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 is listed first,followed by the outer lead anneal, for example,2032x90NiS813x7 D1270
21、x85NiC10 (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 of Seal Lead Outer LeadDia LengthMaterialADia LengthMaterialADia LengthMaterialAmm mm
22、 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 designations.TABLE 2 Descriptive Suffixes for DesignationsSuffix DescriptionA anneal conditio
23、n (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, coated 20 % with copperFeCuC40Steel, coated 40 % with copperTABLE 3 Commonly Used Lead Wi
24、re MaterialsMaterial DesignationAluminum AlCopper CuCopper, nickel-coated CuNiCDumet, medium borate, Specification F 29 DDumet, dark borate, Specification F 29 DDDumet, light borate, Specification F 29 DLDumet, unborated, Specification F 29 DUMolybdenum MoMonel 440, Specification B 127 MlNickel 200,
25、 Specification B 160 NiNickel 200, degassified, Specification B 160 NiSNickel 211, Specification F 290 NiDNickel 211, degassified, Specification F 290 NiDSNickel-silver, coated NiAgCNickel, copper-coated NiCuCIron nickel, 52 Alloy, Specification F 30 NiFeNickel-silver Alloy CuNiZnIron-nickel-cobalt
26、Alloy, Specification F 15 NiFeCoSilver AgSteel, low carbon FeSteel, nickel-coated FeNiCSteel, copper-coated FeCuCPlatinum PtTungsten WSilicon bronze alloy CuSiF 85 76 (2002)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mention
27、edin 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 subject to revision at any time by the responsible technical committee and
28、 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
29、 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
30、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 85 76 (2002)3
