ASTM_F_1_-_03.pdf

Designation:F 1 03Standard Specification forNickel-Clad and Nickel-Plated Steel Strip for Electron Tubes1This standard is issued under the fixed designation F 1;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers steel strip,nickel-clad ornickel-plated on both sides,for use in electron tubes.1.2 The values stated in inch-pound units are to be regardedas the standard.The metric equivalents of inch-pound unitsmay be approximate.2.Referenced Documents2.1 ASTM Standards:2B 487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination of aCross SectionE 30 Test Methods for Chemical Analysis of Steel,CastIron,Open-Hearth Iron,and Wrought Iron3E 39 Test Methods for Chemical Analysis of Nickel3F 155 Test Method for Temper of Strip and Sheet Metals forElectronic Devices(Spring-Back Method)4F 239 Specification for Nickel Alloy Cathode Sleeves forElectron Devices53.Chemical Analysis3.1 The chemical analysis of the steel shall be in accordancewith Methods E 30.3.2 The chemical analysis of the nickel shall be made inaccordance with Methods E 39.4.Bonding of Cladding or Plating4.1 The nickel cladding may be bonded to the steel base byany process that will permit conformance to the requirementsof this specification,except that no other material shall beemployed as a bonding agent.In the preparation of nickel-plated steel no underplate shall be applied and no brightenersshall be used in the electroplating bath.4.2 The material when fully annealed shall be capable ofbeing bent flat upon itself without cracking,chipping,orseparating.This test shall be made with 0.5-in.(13-mm)widesamples taken both lengthwise and crosswise to the grain of thestrip.Examination shall be made under 103 magnification.5.Thickness of Cladding or Plating5.1 Nickel Cladding The nickel cladding on each sideshall conform to one of the following thickness requirements:5.1.1 Type IAthickness of 10 6 1%of the total thicknessof the strip.5.1.2 Type IIA thickness of 15 6 1%of the totalthickness of the strip.5.2 Nickel Plating The nickel plating on each side shallconform to one of the following thickness requirements:5.2.1 Type IAthickness of 0.00012 in.(0.0030 mm),min.5.2.2 Type IIA thickness of 0.00025 in.(0.0064 mm),min.5.3 The thickness of the plating or cladding shall bedetermined by metallographic examination of a transversesection as described in Test Method B 487,or by any methodagreed upon by the producer and the consumer.NOTE1A metallographic technique may be found in the Symposiumon Methods of Metallographic Specimen Preparation.66.Temper6.1 The temper of the strip shall conform to limits agreedupon by the producer and the consumer,and shall be deter-mined in accordance with Test Method F 155.7.Dimensions,Mass and Permissible Variations7.1 ThicknessThe thickness of the material shall conformto the following tolerances:Thickness,in.(mm)Thickness Tolerance,in.(mm)Under 0.010(0.25)0.010 to 0.020(0.25 to 0.50),incl60.0005(0.013)60.0008(0.0203)The thickness shall be measured 0.375 in.(9.5 mm)from theedge on 1-in.(25.4-mm)or wider strip,or at any point onnarrower strip.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 Dec.1,2003.Published January 2004.Originallyapproved in 1957.Last previous edition approved in 1994 as F 194(2000).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 ASTM website.3Discontinued;see 1994 Annual Book of ASTM Standards,Vol 03.05.4Discontinued,see 1983 Annual Book of ASTM Standards,Vol 10.04.5Discontinued;see 1990 Annual Book of ASTM Standards,Vol 10.04.6H.S.Link,“Mechanical Polishing of Metallographic Specimens,”Symposiumon Methods of Metallogrpahic Specimen Preparation,ASTM STP 285,ASTTA,ASTM,1961,pp.811.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.7.2 WidthFor strip less than 3.0 in.(76 mm)wide and lessthan 0.020 in.(0.5 mm)thick,the width tolerance shall be60.005 in.(0.13 mm).7.3 Edgewise Bow shall be a maximum of 0.5 in.(13 mm)in 8 ft(2.4 m).7.4 EdgeThe edge shall be such as would result from astandard slitting operation.7.5 BurrThe burr shall not exceed one half the stripthickness or 0.0025 in.(0.064 mm)whichever is smaller,asmeasured in accordance with the procedure described in theAppendix.8.Workmanship,Finish,and Appearance8.1 The surface shall be as smooth and free of dirt,oxide,pits,scratches,seams,slivers,streaks,stains,scale,blisters,edge cracks,t