ASTM_F_436_-_11.pdf

Designation:F43611Standard Specification forHardened Steel Washers1This standard is issued under the fixed designation F436;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()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers the chemical,mechanical,anddimensional requirements for hardened steel washers for usewith fasteners having nominal thread diameters of14through4 in.These washers are intended for general-purpose mechani-cal and structural use with bolts,nuts,studs,and otherinternally and externally threaded fasteners.These washers aresuitable for use with fasteners covered in Specifications A325,A354,A449,and A490.1.2 The washers are designated by type denoting the mate-rial and by style denoting the shape.1.2.1 The types of washers covered are:1.2.1.1 Type 1Carbon steel.1.2.1.2 Type 3Weathering steel.Atmospheric corrosionresistance and weathering characteristics are comparable tothat of steels covered in Specifications A588/A588M andA709/A709M.The atmospheric corrosion resistance of thesesteels is substantially better than that of carbon steel with orwithout copper addition.See 5.1.When properly exposed tothe atmosphere,these steels can be used bare(uncoated)formany applications.1.2.1.3 This specification provides for furnishing Type 3 tochemical composition or a Corrosion Index(CRI)of 6 orhigher at the suppliers option.1.2.2 The styles of washers covered are:1.2.2.1 CircularCircular washers in nominal bolt sizes14through 4 in.suitable for applications where sufficient spaceexists and angularity permits.1.2.2.2 BeveledBeveledwashersaresquareorrectangular,in nominal sizes12through 112in.,with a beveled1 to 6 ratio surface for use with American standard beams andchannels.1.2.2.3 ClippedClipped washers are circular or beveledfor use where space limitations necessitate that one side beclipped.1.2.2.4 Extra ThickExtra thick washers are circular wash-ers in nominal sizes12through 112in.,with a nominalthickness of516in.suitable for structural applications withoversized holes.1.3 Terms used in this specification are defined in Termi-nology F1789 unless otherwise defined herein.1.4 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard.NOTE1A complete metric companion to Specification F436M hasbeen developedSpecification F436M;therefore no metric equivalentsare presented in this specification.1.5 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 practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A325 Specification for Structural Bolts,Steel,Heat Treated,120/105 ksi Minimum Tensile StrengthA354 Specification for Quenched and Tempered Alloy SteelBolts,Studs,and Other Externally Threaded FastenersA449 Specification for Hex Cap Screws,Bolts and Studs,Steel,Heat Treated,120/105/90 ksi Minimum TensileStrength,General UseA490 Specification for Structural Bolts,Alloy Steel,HeatTreated,150 ksi Minimum Tensile StrengthA588/A588M Specification for High-Strength Low-AlloyStructural Steel,up to 50 ksi 345 MPa Minimum YieldPoint,with Atmospheric Corrosion ResistanceA709/A709M Specification for Structural Steel for BridgesA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsB695 Specification for Coatings of Zinc Mechanically De-posited on Iron and Steel1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nuts,Rivets and Washers.Current edition approved May 15,2011.Published June 2011.Originallyapproved in 1976.Last previous edition approved in 2010 as F436 10.DOI:10.1520/F0436-11.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D3951 Practice for Commercial PackagingF436M Specification for Hardened Steel Washers(Metric)F606 Test Methods for Determining the Mechanical Proper-ties of Externally and Internally Threaded Fasteners,Washers,Direct Tension Indicators,and RivetsF1136 Specification for Zinc/Aluminum Corrosion Protec-tive Coatings for FastenersF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance InspectionF178