1、Designation: F2325 03 (Reapproved 2009)Standard 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
2、, 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 o
3、ther 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 cl
4、assification 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
5、 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/A10
6、9M Specification for Steel, Strip, Carbon (0.25Maximum Percent), Cold-RolledA666 Specification for Annealed or Cold-Worked Austen-itic Stainless Steel Sheet, Strip, Plate, and Flat BarD1418 Practice for Rubber and Rubber LaticesNomenclatureD2000 Classification System for Rubber Products in Auto-moti
7、ve ApplicationsF336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive ServiceF868 Classification for Laminated Composite Gasket Ma-terials2.2 SAE Standard:SAE AE-13 Gasket and Joint Design Manual for Engineand Transmission Systems33. Terminology3.1 Definitions of Ter
8、ms 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
9、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 wi
10、thin the gasket.3.1.5 load stop (stopper)a device used to control com-pression between layers in an MLS 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 comm
11、unications betweenproducers and users, and to guide engineers and designers inthe application and construction of commercially availablegaskets.5. Basis of Classification5.1 This classification is based on the principle that MLSand Metal Layer gaskets should be described, in terms of thetransportati
12、on application and construction. Thus, users ofMLS and Metal Layer gaskets can, by selecting differentcombinations, define various parts needed for specific applica-tions. Likewise, producers can report applications and con-struction of available products.1This classification is under the jurisdicti
13、on of ASTM Committee F03 onGaskets and is the direct responsibility of Subcommittee F03.10 on CompositeGaskets.Current edition approved Oct. 1, 2009. Published March 2010. Originallyapproved in 2003. Last previous edition approved in 2003 as F2325 03. DOI:10.1520/F2325-03R09.2For referenced ASTM sta
14、ndards, 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., Warrendal
15、e, PA 15096-0001.4Load shifting reference from SAEAE-13, “Gasket and Joint Design Manual forEngine and Transmission Systems.”1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Numbering System6.1 To permit a line call-out of the desc
16、ription mentioned in5.1, this classification establishes letter or number symbols todescribe application and construction of MLS and Metal Layergaskets.6.2 In specifying or describing MLS and Metal Layergaskets, each line call-out shall include the ASTM classifica-tion number of this standard, and a
17、 nine character number andletter series describing the application and construction, asshown in Table 1.7. Physical and Mechanical Properties7.1 MLS and Metal Layer gaskets identified by this classi-fication shall have a number and letter call-out for thetransportation application and construction a
18、s indicated inTable 1.8. Thickness Requirements8.1 MLS and Metal Layer gaskets identified by this classi-fication shall conform to the free state or compressed thicknessas specified on the gasket drawing, or customer specification,or both.8.2 The thickness of individual components of the MLS andMeta
19、l Layer gaskets may be specified on the drawing, wherenecessary, and where components can be measured.9. Sampling9.1 Sampling methods are not applicable to this standard.10. Conditioning10.1 Conditioning methods are not applicable to this stan-dard.11. Test Methods11.1 The test methods are not appli
20、cable to this standard.12. Keywords12.1 classification; gaskets; load stop (stopper); metal gas-kets; metal layer gaskets; MLS gaskets; multi-layer steel(MLS) gaskets; single layer steel (SLS) gaskets; steelTABLE 1 Basis of ClassificationA1st Letter 1st Digit 2nd Digit 2nd Letter 3rd Letter 4th Lett
21、er 5th Letter 3rd Digit 4th DigitApplicationTotal NumberSteel/MetalLayersNumber ofActive LayersSteel/MetalBActive LayersCoating TypeCActive LayersSteel/MetalBInactive LayersCoating TypeCInactive LayersLoad Stop(Stopper)ExteriorCoatingAHead GasketBExhaust GasketCIntake SystemDEngine Oil SystemETransm
22、ission Oil SystemFCoolant SystemGFuel SystemXAs SpecifiedYNot SpecifiedZNot Applicable1one layer2two layers3three layers4four layers5five layers9As Specified0none1one layer2two layers3three layers4four layers5five layers9As SpecifiedA301SSB304SSC420SSXAs SpecifiedYNot SpecifiedZNot ApplicableNNBRFFK
23、MWnoneXAs SpecifiedYNot SpecifiedZNot ApplicableA301SSB304SSC420SSDLCSEAluminumXAs SpecifiedYNot SpecifiedZNot ApplicableNNBRFFKMWnoneXAs SpecifiedYNot SpecifiedZNot Applicable0Not Specified1Yes2No0Not Specified1Yes2NoExample: ASTM F2325, A32ANBW11ARepresents an MLS or Metal Layer gasket used in a h
24、ead gasket application.3Total number of Steel/Metal Layers is three.2Total number for Active Layers is two.AActive Layers are made of 301 stainless steel.NActive Layers are coated with NBR (Acrylonitrile-butadiene).BInactive Layers are made of 304 stainless steel.WInactive Layers are not coated.1A L
25、oad Stop (Stopper) is used.1An Exterior Coating is used.AThis classification may also be used to classify Single Layer Steel (SLS) Gaskets.BRefer to Specification A666 or Specification A109/A109M for Stainless Steel and Low Carbon Steel, respectively. Other metals are not referenced and must be defi
26、nedby the producer/user.CRefer to Practice D1418 for general information regarding rubber coating types and use Classification D2000 to define the physical properties of the rubber. Thisphysical property information is typically specified on the gasket drawing and/or the customer specification.F2325
27、 03 (2009)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such
28、rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additio
29、nal standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the A
30、STM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F2325 03 (2009)3
