ASTM_F_1684_-_06_2011.pdf

Designation:F168406(Reapproved 2011)Standard Specification forIron-Nickel and Iron-Nickel-Cobalt Alloys for Low ThermalExpansion Applications1This standard is issued under the fixed designation F1684;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers two iron-nickel alloys and oneiron-nickel-cobalt alloy,for low thermal expansion applica-tions.The two iron-nickel alloys,both containing nominally36%nickel and 64%iron,with the conventional alloydesignated by UNS No.K93603,and the free-machining alloydesignated as UNS No.K93050.The iron-nickel-cobalt alloy,containing nominally 32%nickel,5%cobalt and 63%iron,isdesignated by UNS No.K93500.This specification defines thefollowing product forms for UNS No.K93603 and UNS No.K93500:wire,rod,bar,strip,sheet plate,and tubing.Thefree-machining alloy,UNS No.K93050,is defined for barproducts only.Unless otherwise indicated,all articles apply toall three alloys.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This pertains only to the test method section,Section 13.This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1971 Practices for Digestion of Water Samples for Deter-mination of Metals by FlameAtomicAbsorption,GraphiteFurnace Atomic Absorption,Plasma Emission Spectros-copy,or Plasma Mass SpectrometryE8 Test Methods for Tension Testing of Metallic MaterialsE10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE45 Test Methods for Determining the Inclusion Content ofSteelE92 Test Method for Vickers Hardness of Metallic Materials(Withdrawn 2010)3E112 Test Methods for Determining Average Grain SizeE140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness,Vickers Hardness,RockwellHardness,Superficial Hardness,Knoop Hardness,andScleroscope HardnessE228 Test Method for Linear Thermal Expansion of SolidMaterials With a Push-Rod DilatometerE354 Test Methods for Chemical Analysis of High-Temperature,Electrical,Magnetic,and Other Similar Iron,Nickel,and Cobalt AlloysE1019 Test Methods for Determination of Carbon,Sulfur,Nitrogen,and Oxygen in Steel,Iron,Nickel,and CobaltAlloys by Various Combustion and Fusion TechniquesE1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical Method3.Ordering Information3.1 Orders for material under this specification shall includethe following information:3.1.1 Alloy,as indicated with UNS number,3.1.2 Size,3.1.3 Temper designation(Section 6),3.1.4 Surface finish(Section 10),3.1.5 Marking and packaging(Section 18),and3.1.6 Certification,if required.NOTE1Certification should include traceability of the heat to theoriginal manufacturer.4.Chemical Requirements4.1 Each alloy shall conform to the requirements as tochemical composition prescribed in Table 1.1This specification is under the jurisdiction of ASTM Committee F01 onElectronicsand is the direct responsibility of Subcommittee F01.03 on MetallicMaterials.Current edition approved June 1,2011.Published June 2011.Originallyapproved in 1996.Last previous edition approved in 2006 as F1684 06.DOI:10.1520/F1684-06R11.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2Lower levels of phosphorus and sulfur may be required forcertain welding applications.These lower levels shall be negotiated,asneeded,between the vendor and user.Welding of the free-machining alloy(UNS No.K93050)is generally not recommended.5.Surface Lubricants5.1 All lubricants used during cold-working operations,such as drawing,rolling,or spinning,shall be capable of beingremoved readily by any of the common organic degreasingsolvents.6.Temper6.1 The desired temper of the material shall be specified inthe purchase order.6.2 Tube(UNS No.K93603 and No.K93500 only)Unlessotherwise agreed upon between the supplier or manufacturerand the purchaser,th