ASTM_F_436M_-_11.pdf

Designation:F436M11Standard Specification forHardened Steel Washers(Metric)1This standard is issued under the fixed designation F436M;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.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 metric hardened steel washersfor use with fasteners having nominal thread diameters M12through M100.These washers are intended for general-purposemechanical and structural use with bolts,nuts,studs,and otherinternally and externally threaded fasteners.These washers aresuitable for use with fasteners covered in SpecificationsA325M,A490M,A563M and with fasteners of SpecificationF568M property classes 8.8 and higher.1.2 The types of washers covered in this specification are:1.2.1 Type 1Washers made of carbon steel.1.2.2 Type 3Washers made of steel having atmosphericcorrosion resistance and weathering characteristics comparableto that of steels covered in Specifications A242/A242M,A588/A588M,and A709/A709M.The atmospheric corrosionresistance of these steels is substantially better than that ofcarbon steel with or without copper addition.See 5.1.Whenproperly exposed to the atmosphere,these steels can be usedbare(uncoated)for many applications.1.2.3 This specification provides for furnishing Type 3 tochemical composition or a Corrosion Resistance Index(CRI)of 6 or higher at the suppliers option.1.3 The styles of washers covered in this specification are:1.3.1 Circular WashersCircular washers in nominal sizes12 mm through 100 mm,are suitable for applications wheresufficient space exists and angularity permits.1.3.2 Beveled WashersBeveled washers are square andrectangular,in nominal sizes 12 mm through 36 mm,with abeveled 1:6 surface for use withAmerican Standard beams andchannels.1.3.3 Clipped WashersClipped washers are circular orbeveled for use where space limitations necessitate that oneside be clipped.1.4 Terms used in this specification are defined in Termi-nology F1789 unless otherwise defined herein.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.NOTE1This specification is the metric counterpart of SpecificationF436.1.6 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:2A153/A153M Specification for Zinc Coating(Hot-Dip)onIron and Steel HardwareA242/A242M Specification for High-Strength Low-AlloyStructural SteelA325M Specification for Structural Bolts,Steel,HeatTreated 830 MPa Minimum Tensile Strength(Metric)A490M Specification for High-Strength Steel Bolts,Classes10.9 and 10.9.3,for Structural Steel Joints(Metric)A563M Specification for Carbon andAlloy Steel Nuts(Met-ric)A588/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 SteelD3951 Practice for Commercial PackagingF436 Specification for Hardened Steel WashersF568M Specification for Carbon and Alloy Steel Externally1This 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 Nov.15,2011.Published January 2012.Originallyapproved in 1983.Last previous edition approved in 2010 as F436M 10.DOI:10.1520/F0436M-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 Threaded Metric Fasteners(Metric)(Withdrawn 2012)3F606M Test Methods for Determining the Mechanical Prop-erties of Externally and Internally Threaded Fasteners,Washers,and Rivets(Metric)F1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance InspectionF1136M Specification for Zinc/Aluminum Corrosion Pro-tective Coatings for Fasteners(Metric)(Withdrawn 2011)3F1789 Terminology for F16 Mechanical FastenersG101 Guide for Estimating the Atmospheric Cor