1、Designation: F 2325 03Standard Classification forMulti-Layer Steel (MLS) and Other Metal Layer Gaskets forTransportation Applications1This standard is issued under the fixed designation F 2325; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 Laye
3、r 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 an
4、d are covered by Classifi-cation F 868 and Practice F 336, 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 The values stated in SI units are to be regard
5、ed as thestandard. The values given in parentheses are for informationonly.1.4 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 determin
6、e the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:A 109 Specification for Steel, Strip, Carbon (0.25 Maxi-mum Percent), Cold-Rolled2A 666 Specification for Annealed or Cold-Worked Austen-itic Stainless Steel Sheet, Strip, Plate, and Flat Bar2D 141
7、8 Practice for Rubber and Rubber LatticesNomenclature3D 2000 Classification System for Rubber Products in Auto-motive Applications4F 336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive Service4F 868 Classification for Laminated Composite Gasket Ma-terials42.2 SAE S
8、tandard:AE-13 Gasket and Joint Design Manual for Engine andTransmission Systems53. 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 re
9、lief 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.63.1.3 exterior coatinga supplemental coating applied tothe exterior of the gasket for anti-fret, anti-blocking,
10、 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 between layers in an MLS or Metal Layer gasket.4. Significance and Use4.1 This classification is intended
11、 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.5. Basis of Classification5.1 This class
12、ification is based on the principle that MLSand Metal Layer gaskets should be described, in terms of thetransportation application and construction. Thus, users ofMLS and Metal Layer gaskets can, by selecting differentcombinations, define various parts needed for specific applica-tions. Likewise, pr
13、oducers can report applications and con-struction of available products.1This classification is under the jurisdiction of ASTM Committee F03 onGaskets and is the direct responsibility of Subcommittee F03.10 on CompositeGaskets.Current edition approved Oct. 1, 2003. Published October 2003.2Annual AST
14、M Book of Standards, Vol 01.03.3Annual ASTM Book of Standards, Vol 09.01.4Annual ASTM Book of Standards, Vol 09.02.5Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001.6Load shifting reference from SAE AE-13 “Gasket and Joint Design Manual forEngine a
15、nd 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 description mentioned in5.1, this classification establishes letter or number symbols todescribe applica
16、tion 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 nine character number andletter series describing the application and construction, asshown in Tabl
17、e 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 as indicated inTable 1.8. Thickness Requirements8.1 MLS and Metal Layer gaskets identified by this cl
18、assi-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 andMetal Layer gaskets may be specified on the drawing, wherenecessary, and where components can be measure
19、d.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 applicable to this standard.12. Keywords12.1 classification; gaskets; load stop (stopper); metal gas-kets
20、; metal layer gaskets; MLS gaskets; multi-layer steel(MLS) gaskets; single layer steel (SLS) gaskets; steelASTM 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 th
21、at determination of the validity of any such patent rights, and the riskof infringement of such 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 reappr
22、oved or withdrawn. Your comments are invited either for revision of this standard or for additional 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 f
23、eel that your comments have not received a fair hearing you shouldmake your views known to the ASTM 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 re
24、prints (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).TABLE 1 Basis of ClassificationA1st Letter 1st Digit 2nd Digit 2nd Letter
25、3rd Letter 4th Letter 5th Letter 3rd Digit 4th DigitApplicationTotal NumberSteel/MetalLayersNumber ofActive LayersSteel/MetalBActive LayersCoating TypeCActive LayersSteel/MetalBInactive LayersCoating TypeCInactive LayersLoad Stop(Stopper)ExteriorCoatingAHead GasketBExhaust GasketCIntake SystemDEngin
26、e Oil SystemETransmission Oil SystemFCoolant SystemGFuel SystemXAs SpecifiedYNot SpecifiedZNot Applicable1one layer2two layers3three layers4four layers5five layers9As Specified0none1one layer2two layers3three layers4four layers5five layers9As SpecifiedA301SSB304SSC420SSXAs SpecifiedYNot SpecifiedZNo
27、t ApplicableNNBRFFKMWnoneXAs SpecifiedYNot SpecifiedZNot ApplicableA301SSB304SSC420SSDLCSEAluminumXAs SpecifiedYNot SpecifiedZNot ApplicableNNBRFFKMWnoneXAs SpecifiedYNot SpecifiedZNot Applicable0Not Specified1Yes2No0Not Specified1Yes2NoExample: ASTM F 2325, A32ANBW11ARepresents an MLS or Metal Laye
28、r gasket used in a head 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
29、 are not coated.1A Load 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 A 666 or Specification A 109 for Stainless Steel and Low Carbon Steel, respectively. Other metals are not referenced
30、and must be defined bythe producer/user.CRefer to Practice D 1418 for general information regarding rubber coating types and use Classification D 2000 to define the physical properties of the rubber. Thisphysical property information is typically specified on the gasket drawing and/or the customer specification.F2325032
