1、Designation: F 868 02 (Reapproved 2009)Standard Classification forLaminated Composite Gasket Materials1This standard is issued under the fixed designation F 868; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. 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 ordescribing pertinent properties of commercial laminate com-posite gasket ma
3、terials (LCGM). These structures are com-posed of two or more chemically different layers of material.These materials may be organic or inorganic, or combinationswith various binders or impregnants. Gasket coatings are notcovered since details thereof are intended to be given onengineering drawings,
4、 or as separate specifications. Commer-cial materials designated as enveloped gaskets are excludedfrom this classification; they are covered in Practice F 336.1.2 Since all of the properties that contribute to gasketperformance are not included, use of this classification as abasis for selecting LCG
5、M is limited.1.3 The values stated in SI units are to be regarded 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
6、establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A 109/A 109M Specification for Steel, Strip, Carbon (0.25Maximum Percent), Cold-RolledD 2000 Classification System for Rubber Products
7、 in Auto-motive ApplicationsF 104 Classification System for Nonmetallic Gasket Mate-rialsF 146 Test Methods for Fluid Resistance of Gasket Materi-alsF 336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive ServiceF 433 Practice for Evaluating Thermal Conductivity ofGa
8、sket MaterialsF 1276 Test Method for Creep Relaxation of LaminatedComposite Gasket Materials3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 boardthe term board is used in the context of a thick(generally greater than 1.52 mm (0.060 in.) and rigid nonme-tallic material often pu
9、rchased in sheet or strip form.3.1.2 composite gasket materiala gasket structure com-posed of two or more different materials joined together in flat,parallel layers.4. Significance and Use4.1 This classification is intended to encourage uniformityin reporting properties; to provide a common languag
10、e forcommunications between producers and users; to guide engi-neers and designers in the use, construction, and properties ofcommercially available materials; and to be versatile enough tocover new materials and test methods as they are introduced.5. Basis of Classification5.1 This classification i
11、s based on the principle that LCGMshould be described, insofar as possible, in terms of use,composition, combining method, and specific physical andmechanical characteristics. Thus, users of gasket materials can,by selecting different combinations of materials and properties,define various parts. Su
12、ppliers, likewise, can report uses,composition, and properties of available products.6. Numbering System6.1 To permit line call-out of the description mentioned in5.1, this classification establishes letter or number symbols todescribe use, composition, and physical properties and perfor-mance level
13、s of certain properties.6.2 In specifying or describing gasket materials, each linecall-out shall include the number of this system and a numberand letter series describing the use, composition, and combin-ing method plus suffix call-out, as shown in Table 1.1This classification is under the jurisdi
14、ction of ASTM Committee F03 onGaskets and is the direct responsibility of Subcommittee F03.30 on Classification.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 1984. Last previous edition approved in 2002 as F 868 02.2For referenced ASTM standards, visit the ASTM webs
15、ite, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
16、es.6.3 To further specify or describe gasket materials, each linecall-out may include one or more suffix letter-numeral sym-bols, as listed in Table 2.7. Physical and Mechanical Properties7.1 Gasket materials identified by this classification shallhave a number and letter call-out for end-use and co
17、nstructionindicated in Table 1 and additional properties by a letter-numeral call-out shown in Table 2.8. Thickness Requirements8.1 Gasket materials identified by this classification shallconform to the thickness specified on the gasket drawing or onthe order.8.2 The thickness of individual componen
18、ts of the compos-ite may be specified on the drawing, where necessary, andwhere components can be measured.9. Sampling9.1 Specimens shall be selected from finished gaskets orsheets of suitable size, whichever is the more practicable. Iffinished gaskets are used, the dimensions of sample and anyvaria
19、tions from method must be reported.9.2 Sufficient specimens shall be selected to provide aminimum of three determinations for each test specified. Theaverage of the determinations shall be considered as the result.10. Conditioning10.1 Prior to all tests, specimens shall be conditioned asfollows:10.1
20、.1 When all Classification F 104 layers of the compositeare of the same “type,” condition per that type.10.1.2 When the layers of the composite are of differentClassification F 104 “types,” the composite shall be condi-tioned 22 h in a controlled humidity room, or in a closedchamber containing air a
21、t 21 to 30C (70 to 86F) and 50 to55 % relative humidity.10.1.3 Other conditioning may be used as agreed uponbetween producer and user.11. Test Methods11.1 The test methods are indicated in Table 2 under eachsuffix symbol when appropriate. Results must be reported asspecified in each test method used
22、.12. Keywords12.1 classification; composite; gasket materials; laminatedF 868 02 (2009)2TABLE 2 Supplementary Physical and Mechanical CharacteristicsSuffix Symbol Supplementary CharacteristicsA9 Sealability characteristics determined as agreed upon between supplier and user.C9 Compressibility charac
23、teristics as agreed upon between producer and user.D9 Release characteristics determined as agreed upon between supplier and user.E00 through E99 Weight and thickness change after immersion in ASTM Fuel B shall be determined in accordance with Test MethodsF 146.Weight increase shall not exceed the s
24、tandard rating number indicated by the first numeral of the two-digit numberof the E-/symbol.Thickness increase shall not exceed the standard rating indicated by the second numeral of the E-/symbol.Percent Weight Increase(first numeral)Percent Thickness Increase(second numeral)E0_ = not specified E_
25、0 = not specifiedE1_ = 10 E_1 = 05E2_ = 15 E_2 = 010E3_ = 20 E_3 = 015E4_ = 30 E_4 = 520E5_ = 40 E_5 = 1025E6_ = 50 E_6 = 1535E7_ = 60 E_7 = 2545E8_ = 100 E_8 = 3060E9_ = as specified E_9 = as specifiedG00 through G99 Weight and thickness change after immersion in ASTM #3 Oil shall be determined in
26、accordance with TestMethods F 146.Weight increase shall not exceed the standard rating number indicated by first numeral of the two-digit numberof the G-/symbol. Thickness increase shall not exceed the standard rating number indicated by the secondnumeral of the G-/symbol.Percent Weight Increase(fir
27、st numeral)Percent Thickness Increase(second numeral)G0_ = not specified G_0 = not specifiedG1_ = 10, max G_1 = 015G2_ = 15, max G_2 = 520G3_ = 20, max G_3 = 1025G4_ = 30, max G_4 = 1530G5_ = 40, max G_5 = 2040G6_ = 60, max G_6 = 3050G7_ = 80, max G_7 = 4060G8_ = 100, max G_8 = 5070G9_ = as specifie
28、d G_9 = as specifiedH1 through H9 Creep relaxation characteristics shall be determined in accordance with Test Method F 1276. Loss of stress atthe end of the test shall not exceed the amount indicated by the numeral of the H-/symbol.H1=10% H5=30%H2=15% H6=40%H3=20% H7=50%H4 = 25 % H9 = as specifiedK
29、0 through K9 Thermal conductivity characteristics shall be determined in accordance with Practice F 433. The K-factorobtained in W/mK (Btuin./hft2F), shall fall within the ranges indicated by the numeral of a K-/symbol.K1=0.to0.09(0to0.65)K2 = 0.07 to 0.17 (0.50 to 1.15)K3 = 0.14 to 0.24 (1.00 to 1.
30、65)K4 = 0.22 to 0.31 (1.50 to 2.15)K5 = 0.29 to 0.38 (2.00 to 2.65)K6 = 0.36 to 0.45 (2.50 to 3.15)K7 = 0.43 to 0.53 (3.00 to 3.65)K8 = 0.50 to 0.60 (3.50 to 4.15)K9 = as specifiedAL9 Laminated bond characteristics as agreed upon between producer and user.X9 Crush-extrusion resistance characteristic
31、s as agreed upon between producer and user.Y9 Coating(s) per drawing details.Z0 through Z9 Any other properties per drawing details.AOn engineering drawings or other supplements to this classification.F 868 02 (2009)3ASTM International takes no position respecting the validity of any patent rights a
32、sserted 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 rights, are entirely their own responsibility.This standard is subject to revision at any time
33、 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 additional standardsand should be addressed to ASTM International Headquarters. Your comments will re
34、ceive 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 ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM In
35、ternational, 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).F 868 02 (2009)4
