ASTM_F_2325_-_14.pdf

Designation:F232514Standard Classification forMulti-Layer Steel(MLS)and Other Metal Layer Gaskets forTransportation Applications1This standard is issued under the fixed designation F2325;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 classification covers a means for specifying Multi-Layer Steel(MLS)and other Metal Layer Gaskets for Trans-portation Applications by application and construction.Thesestructures are composed of one or more steel or metal layers ofmaterial,which may have coatings or embossments.Commer-cial materials designated as composite or enveloped gaskets areexcluded from this classification and are covered by Classifi-cation F868 and Practice F336,respectively.1.2 Since all of the properties that contribute to gasketperformance are not included,use of this classification as abasis for selecting an MLS or Metal Layer gasket is limited.1.3 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 requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel,Strip,Carbon(0.25Maximum Percent),Cold-RolledA666 Specification for Annealed or Cold-Worked AusteniticStainless Steel Sheet,Strip,Plate,and Flat BarD1418 PracticeforRubberandRubberLaticesNomenclatureD2000 Classification System for Rubber Products in Auto-motive ApplicationsF336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive ServiceF868 Classification for Laminated Composite Gasket Mate-rials2.2 SAE Standard:SAEAE-13 Gasket and Joint Design Manual for Engine andTransmission Systems33.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 active layer(s)an embossed layer(s)used to providethe primary sealing function.3.1.2 embossment(emboss)a raised area of a steel ormetal layer in relief from the rest of the layer with a definedgeometry typically used at the sealing interface.Embossmentsmay also be used to shift load to areas,which require bettersealing performance.43.1.3 exterior coatinga supplemental coating applied tothe exterior of the gasket for anti-fret,anti-blocking,or sealingenhancement.3.1.4 inactive layer(s)the flat or non-embossed layer(s)used for spacing or other purposes within the gasket.3.1.5 load stop(stopper)a device used to control com-pression on Single Layer Steel(SLS)or between layers in anMLS or Metal Layer gasket.4.Significance and Use4.1 This classification is intended to encourage uniformityin reporting properties of MLS and Metal Layer gaskets,toprovide a common language for communications betweenproducers and users,and to guide engineers and designers inthe application and construction of commercially availablegaskets.4.2 Suffix Table 2 is provided to allow hardness designationfor Active,Inactive,or Load Stoppers.4.2.1 If suffixes are not to be used,only the basic calloutfrom Table 1 is required.If a suffix is used for 1 layer,it mustbe specified for all layers,even if a“0”is used.It cannot beassumed that hardnesses of like layers are the same;if used,alllayers must be specified separately.The first layer specified1This classification is under the jurisdiction of ASTM Committee F03 onGaskets and is the direct responsibility of Subcommittee F03.10 on CompositeGaskets.Current edition approved July 1,2014.Published December 2014.Originallyapproved in 2003.Last previous edition approved in 2009 as F2325 03(2009).DOI:10.1520/F2325-14.2For 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.3Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001.4Load shifting reference from SAEAE-13,“Gasket and Joint Design Manual forEngine and Transmission Systems.”Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 must be indicated on the part drawing.To use a hardnesscall-out,at the end of the base callout leave a space followedby the“HR”suffix with a series of suffix numbers to specifythe hardnesses for each layer.4.2.1.1 Example:ASTM F2325,A32ANBW11 HR252Example from Table 1 modified to add hardness requirementfor the three metal layers.Active layers 1 and 3 are designatedto be the same,14hard steel.Stopper layer 2 is designated tobe full hard steel.5.Basis of Classification5.1 This classification is based on the principle that MLSand Metal Layer gaskets should be described,in terms of thetransportation application and c