1、Designation: F 85 76 (Reapproved 2009)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 () 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 throu
3、gh 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, asso
4、ciated 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:2B 127 Specification for Nickel-Copper Alloy (UNSN04400) P
5、late, Sheet, and StripB 160 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 AlloysF 290 Specification for Round Wire for Winding ElectronTube Grid L
6、aterals3. 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 from the right.3.2 LengthThe lengt
7、h shall be expressed in millimetresusing any number of digits.NOTE 1All fractions shall be expressed in millimetres as 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
8、toas 508x13.4. 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 millimetres, and thematerial (see Section 4).
9、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,corresponding to Inner LeadPress LeadOut
10、er 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 atthe end of the material designation
11、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 Materials ListCommonly used lead wire mat
12、erialsand their respective designations are listed in Table 3. Wheretrade names are indicated, equivalent materials may 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 conditio
13、ns,standard treatments are available as follows:5.4.1 Anneal Types:5.4.1.1 Entire Lead Anneal (No. 1)Entire leads involvingnickel and copper are annealed at a temperature suitable forannealing copper but below the annealing point for nickel.After annealing, the leads are put through a straighteningp
14、rocess to recondition any leads which become distortedduring the anneal.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 approved May 1, 2009. Published July 2009. Originally app
15、rovedin 1967. Last previous edition approved in 2002 as F 85 - 76 (2002).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe A
16、STM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 Anneal (No. 2)This process anneals
17、 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 to the press and outer leadpar
18、ts. 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-madeleads.5.4.1.7 Special Anne
19、al (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 suitable for annealing nickel. T
20、his 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” and enclosed in parentheses
21、 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 D1270x85NiC10 (A4, A5).6. Keywords
22、6.1 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 mm mm mm mm1 1524x21D . . .
23、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 condition (see 5.4)S degassedHd hard
24、(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 Wire MaterialsMaterial Designat
25、ionAluminum AlCopper CuCopper, nickel-coated CuNiCDumet, medium borate, Specification F29 DDumet, dark borate, Specification F29 DDDumet, light borate, Specification F29 DLDumet, unborated, Specification F29 DUMolybdenum MoMonel 440, Specification B 127 MlNickel 200, Specification B 160 NiNickel 200
26、, 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 F30 NiFeNickel-silver Alloy CuNiZnIron-nickel-cobalt Alloy, Specification F15 NiFeCoSil
27、ver AgSteel, low carbon FeSteel, nickel-coated FeNiCSteel, copper-coated FeCuCPlatinum PtTungsten WSilicon bronze alloy CuSiF 85 76 (2009)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this s
28、tandard 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 must be reviewed every five years
29、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 theresponsible technical committee
30、, 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 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 (2009)3
