1、Designation: F2325 03 (Reapproved 2009)F2325 14Standard 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 ado
2、ption 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 (ML
3、S) and other Metal Layer Gaskets for TransportationApplications by application and construction. These structures are composed of one or more steel or metal layers of material, whichmay have coatings or embossments. Commercial materials designated as composite or enveloped gaskets are excluded from
4、thisclassification and are covered by Classification F868 and Practice F336, respectively.1.2 Since all of the properties that contribute to gasket performance are not included, use of this classification as a basis forselecting an MLS or Metal Layer gasket is limited.1.3 This standard does not purp
5、ort to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatoryrequirements prior to use.2. Referenced Documents2.1 ASTM Standards:2A109
6、/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-RolledA666 Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat BarD1418 Practice for Rubber and Rubber LaticesNomenclatureD2000 Classification System for Rubber Products in Autom
7、otive ApplicationsF336 Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive ServiceF868 Classification for Laminated Composite Gasket Materials2.2 SAE Standard:SAE AE-13 Gasket and Joint Design Manual for Engine and Transmission Systems33. Terminology3.1 Definitions of
8、 Terms Specific to This Standard:3.1.1 active layer(s)an embossed layer(s) used to provide the primary sealing function.3.1.2 embossment (emboss)a raised area of a steel or metal layer in relief from the rest of the layer with a defined geometrytypically used at the sealing interface. Embossments ma
9、y also be used to shift load to areas, which require better sealingperformance.43.1.3 exterior coatinga supplemental coating applied to the 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 pu
10、rposes within the gasket.3.1.5 load stop (stopper)a device used to control compression on Single Layer Steel (SLS) or between layers in an MLS orMetal Layer gasket.1 This classification is under the jurisdiction of ASTM Committee F03 on Gaskets and is the direct responsibility of Subcommittee F03.10
11、 on Composite Gaskets.Current edition approved Oct. 1, 2009July 1, 2014. Published March 2010December 2014. Originally approved in 2003. Last previous edition approved in 20032009 asF2325 03.F2325 03 (2009). DOI: 10.1520/F2325-03R09.10.1520/F2325-14.2 For referencedASTM standards, visit theASTM webs
12、ite, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001.4 Load
13、shifting reference from SAE AE-13, “Gasket and Joint Design Manual for Engine and Transmission Systems.”This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be techni
14、cally possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Bo
15、x C700, West Conshohocken, PA 19428-2959. United States14. Significance and Use4.1 This classification is intended to encourage uniformity in reporting properties of MLS and Metal Layer gaskets, to providea common language for communications between producers and users, and to guide engineers and de
16、signers in the application andconstruction of commercially available gaskets.4.2 Suffix Table 2 is provided to allow hardness designation for Active, Inactive, or Load Stoppers.4.2.1 If suffixes are not to be used, only the basic callout from Table 1 is required. If a suffix is used for 1 layer, it
17、must bespecified for all layers, even if a “0” is used. It cannot be assumed that hardnesses of like layers are the same; if used, all layersTABLE 1 Basis of ClassificationA1st Letter 1st Digit 2nd Digit 2nd Letter 3rd Letter 4th Letter 5th Letter 3rd Digit 4th DigitApplicationTotal NumberSteel/Meta
18、lLayersNumber ofActive LayersSteel/MetalBActive LayersCoating TypeCActive LayersSteel/MetalBInactive LayersCoating TypeCInactive LayersLoad Stop(Stopper)ExteriorCoatingAHead GasketBExhaust GasketCIntake SystemDEngine Oil SystemETransmission OilSystemFCoolant SystemGFuel SystemXAs SpecifiedYNot Speci
19、fiedZNot Applicable1one layer2two layers3three layers4four layers5five layers9As Specified0none1one layer2two layers3three layers4four layers5five layers9As SpecifiedA301SSB304SSC420SSXAs SpecifiedYNotSpecifiedZNotApplicableNNBRFFKMWnoneXAs SpecifiedYNotSpecifiedZNotApplicableA301SSB304SSC420SSDLCSE
20、AluminumXAs SpecifiedYNotSpecifiedZNotApplicableNNBRFFKMWnoneXAs SpecifiedYNot SpecifiedZNotApplicable0Not Specified1Yes2No0Not Specified1Yes2NoExample: ASTM F2325, A32ANBW11ARepresents an MLS or Metal Layer gasket used in a head gasket application.3Total number of Steel/Metal Layers is three.2Total
21、 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 Load Stop (Stopper) is used.1An Exterior Coating is used.TABLE 1 Basis of C
22、lassificationA1st Letter 1st Digit 2nd Digit 2nd Letter 3rd Letter 4th Letter 5th Letter 3rd Digit 4th DigitApplicationTotal NumberSteel/MetalLayersNumber ofActive LayersSteel/MetalBActive LayersCoating TypeCActive LayersSteel/MetalBInactive LayersCoating TypeCInactive LayersLoad Stop(Stopper)Exteri
23、orCoatingAHead GasketBExhaust GasketCIntake SystemDEngine Oil SystemETransmission OilSystemFCoolant SystemGFuel SystemXAs SpecifiedYNot SpecifiedZNot Applicable1one layer2two layers3three layers4four layers5five layers6six layers7seven layers8eight layers9As Specified0none1one layer2two layers3three
24、 layers4four layers5five layers6six layers7seven layers8eight layers9As SpecifiedA301SSB304SSC420SSD-309SSE-441SSF201SSH-High TempAlloyXAs SpecifiedYNotSpecifiedZNotApplicableB-BoronitrideNNBRFFKMM-MoS2S-Sinter BrassWnoneXAs SpecifiedYNotSpecifiedZNotApplicableA301SSB304SSC420SSDLCSEAluminumXAs Spec
25、ifiedYNotSpecifiedZNotApplicableB-BoronitrideNNBRFFKMM-MoS2S-Sinter BrassWnoneXAs SpecifiedYNot SpecifiedZNotApplicable0Not Specified1Yes2No3Externalstopper feature(that is, groovein flange)0Not Specified1Yes2No3Both ExteriorSides41 ExteriorsideDExample: ASTM F2325, A32ANBW11ARepresents an MLS or Me
26、tal Layer 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.WInactiv
27、e Layers are not coated.1A Load Stop (Stopper) is used.1An Exterior Coating is used (unspecified if it is on one or both exterior sides).A This classification may also be used to classify Single Layer Steel (SLS) Gaskets.B Refer to Specification A666 or Specification A109/A109M for Stainless Steel a
28、nd Low Carbon Steel, respectively. Other metals are not referenced and not referencedin the table or not covered by Specification A666 or Specification A109/A109M must be defined by the producer/user. producer/user (that is, H High TemperatureAlloy).C Refer to Practice D1418 for general information
29、regarding rubber coating types and use Classification D2000 to define the physical properties of the rubber. This physicalproperty information is typically specified on the gasket drawing and/oror the customer specification.specification, or both.DCoated side as specified on part drawing.F2325 142mu
30、st be specified separately. The first layer specified must be indicated on the part drawing. To use a hardness call-out, at the endof the base callout leave a space followed by the “HR” suffix with a series of suffix numbers to specify the hardnesses for eachlayer.4.2.1.1 Example: ASTM F2325, A32ANB
31、W11 HR252Example from Table 1 modified to add hardness requirement for thethree metal layers. Active layers 1 and 3 are designated to be the same, 14 hard steel. Stopper layer 2 is designated to be full hardsteel.5. Basis of Classification5.1 This classification is based on the principle that MLS an
32、d Metal Layer gaskets should be described, in terms of thetransportation application and construction. Thus, users of MLS and Metal Layer gaskets can, by selecting different combinations,define various parts needed for specific applications. Likewise, producers can report applications and constructi
33、on of availableproducts.6. Numbering System6.1 To permit a line call-out of the description mentioned in 5.1, this classification establishes letter or number symbols todescribe application and construction of MLS and Metal Layer gaskets.6.2 In specifying or describing MLS and Metal Layer gaskets, e
34、ach line call-out shall include the ASTM classification numberof this standard, and a nine character number and letter series describing the application and construction, as shown in Table 1.7. Physical and Mechanical Properties7.1 MLS and Metal Layer gaskets identified by this classification shall
35、have a number and letter call-out for the transportationapplication and construction as indicated in Table 1.8. Thickness Requirements8.1 MLS and Metal Layer gaskets identified by this classification shall conform to the free state or compressed thickness asspecified on the gasket drawing, or custom
36、er specification, or both.8.2 The thickness of individual components of the MLS and Metal 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
37、are not applicable to this standard.11. Test Methods11.1 The test methods are not applicable to this standard.TABLE 2 Suffix Additions for Specifyng Layer Hardness0 Not Specified1 Annealed2 14 Hard3 12 Hard4 34 Hard5 Full Hard6 Extra Hard9 As SpecifiedF2325 14312. Keywords12.1 classification; gasket
38、s; load stop (stopper); metal gaskets; 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 t
39、his standard are expressly advised that 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 y
40、ears andif not revised, either reapproved 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 commi
41、ttee, which you may attend. If you feel 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 194
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