1、Designation: F 868 02Standard 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 revision. A number in
2、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 ordescribing pertinent properties of commercial laminate com-posite gasket materials (LCGM). T
3、hese 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, or as separate s
4、pecifications. 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 LCGM is limited.1.3
5、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 establish appro-p
6、riate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:A 109/A 109M Specification for Steel, Strip, Carbon (0.25Maximum Percent), Cold-Rolled2D 2000 Classification System for Rubber Products in Auto-motive A
7、pplications3F 104 Classification System for Nonmetallic Gasket Mate-rials3F 146 Test Methods for Fluid Resistance of Gasket Materi-als3F 336 Practice for Design and Construction of NonmetallicEnveloped Gaskets for Corrosive Service3F 433 Practice for Evaluating Thermal Conductivity ofGasket Material
8、s3F 1276 Test Method for Creep Relaxation of LaminatedComposite Gasket Materials33. 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 purchased in
9、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 language forcommun
10、ications 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 is based on
11、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. Suppliers, li
12、kewise, 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 levels of certai
13、n 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 1.6.3 To further specify or describe gasket materials,
14、 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 shall1This classification is under the jurisdiction of ASTM Committee F03 onGaskets and is the direct responsibi
15、lity of Subcommittee F03.10 on CompositeGaskets.Current edition approved October 10, 2002. Published October 2002. Originallypublished as F 868 84. Last previous edition F 868 91 (1997)e1.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 09.02.1Copyright ASTM Internationa
16、l, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.have a number and letter call-out for end-use and constructionindicated in Table 1 and additional properties by a letter-numeral call-out shown in Table 2.8. Thickness Requirements8.1 Gasket materials identified b
17、y this classification shallconform to the thickness specified on the gasket drawing or onthe order.8.2 The thickness of individual components 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 finish
18、ed gaskets orsheets of suitable size, whichever is the more practicable. Iffinished gaskets are used, the dimensions of sample and anyvariations from method must be reported.9.2 Sufficient specimens shall be selected to provide aminimum of three determinations for each test specified. Theaverage of
19、the determinations shall be considered as the result.10. Conditioning10.1 Prior to all tests, specimens shall be conditioned asfollows:10.1.1 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 differentC
20、lassification F 104 “types,” the composite shall be condi-tioned 22 h in a controlled humidity room, or in a closedchamber containing air at 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 te
21、st methods are indicated in Table 2 under eachsuffix symbol when appropriate. Results must be reported asspecified in each test method used.12. Keywords12.1 gasket materials; classification; gasket materials; com-posite; gasket materials; laminatedF868022TABLE 2 Supplementary Physical and Mechanical
22、 CharacteristicsSuffix Symbol Supplementary CharacteristicsA9 Sealability characteristics determined as agreed upon between supplier and user.C9 Compressibility characteristics as agreed upon between producer and user.D9 Release characteristics determined as agreed upon between supplier and user.E00
23、 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 standard rating number indicated by the first numeral of the two-digit numberof the E-/symbol.Thickness increase shall not exceed the
24、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_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_ = 6
25、0 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 accordance with TestMethods F 146.Weight increase shall not exceed the standard rating number indicated by first numeral of the two-d
26、igit numberof the G-/symbol. Thickness increase shall not exceed the standard rating number indicated by the secondnumeral of the G-/symbol.Percent Weight Increase(first numeral)Percent Thickness Increase(second numeral)G0_ = not specified G_0 = not specifiedG1_ = 10, max G_1 = 015G2_ = 15, max G_2
27、= 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 specified G_9 = as specifiedH1 through H9 Creep relaxation characteristics shall be determined in accordance with Test Method F 1276. Loss of
28、 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 specifiedK0 through K9 Thermal conductivity characteristics shall be determined in accordance with Practice F 433. The K-factorobtained in W/mK
29、 (Btuin./hft2F), shall fall within the ranges indicated by the numeral of a K-/symbol.K1 = 0. to 0.09 (0 to 0.65)K2 = 0.07 to 0.17 (0.50 to 1.15)K3 = 0.14 to 0.24 (1.00 to 1.65)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
30、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 characteristics as agreed upon between producer and user.Y9 Coating(s) per drawing details.Z0 through Z9 Any other properties per drawing de
31、tails.AOn engineering drawings or other supplements to this classification.F868023ASTM 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 v
32、alidity 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 reapproved or withdrawn. Your c
33、omments 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 feel that your comments ha
34、ve 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 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).F868024
