Standard Classification System for Rubber …

1 Designation: D 2000 99 Approved bySociety of Automotive EngineersSAE Recommended Practice J200 Standard Classification System forRubber Products in Automotive Applications1 This Standard is issued under the fixed designation D 2000; 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 parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or specification has been approved for use by agencies of the Department of This classification System tabulates the properties ofvulcanized Rubber materials (natural Rubber , reclaimed Rubber ,synthetic rubbers, alone or in combination) that are intendedfor, but not limited to, use in Rubber products for This classification System may serve many of the needs ofother industries in much the same manner as SAE numbered steels.

2 It mustbe remembered, however, that this System is subject to revision whenrequired by automotive needs. It is recommended that the latest revisionalways be This classification System is based on the premise thatthe properties of all Rubber products can be arranged intocharacteristic material designations. These designations aredetermined bytypes,based on resistance to heat aging, andclasses,based on resistance to swelling in oil. Basic levels arethus established which, together with values describing addi-tional requirements, permit complete description of the qualityof all elastomeric In all cases where the provisions of this classificationsystem would conflict with those of the detailed specificationsfor a particular product , the latter shall take When the Rubber product is to be used for purposes where therequirements are too specific to be completely prescribed by this classi-fication System , it is necessary for the purchaser to consult the supplier inadvance, to establish the appropriate properties, test methods, and speci-fication test The values stated in SI units are to be regarded as Referenced standards .

3 D 395 Test Methods for Rubber Property CompressionSet2D 412 Test Methods for Vulcanized Rubber and Thermo-plastic Rubbers and Thermoplastic Elastomers Tension2D 429 Test Methods for Rubber Property Adhesion toRigid Substrates2D 430 Test Methods for Rubber Deterioration DynamicFatigue2D 471 Test Method for Rubber Property Effect of Liq-uids2D 573 Test Method for Rubber Deterioration in an AirOven2D 575 Test Methods for Rubber Properties in Compression2D 624 Test Method for Tear Strength of ConventionalVulcanized Rubber and Thermoplastic Elastomers2D 865 Test Method for Rubber Deterioration by Heatingin Air (Test Tube Enclosure)2D 925 Test Methods for Rubber Property Staining of Sur-faces (Contact, Migration, and Diffusion)2D 945 Test Methods for Rubber Properties in Compressionor Shear (Mechanical Oscillograph)2D 1053 Test Methods for Rubber Property Stiffening atLow Temperatures.

4 Flexible Polymers and Coated Fab-rics2D 1171 Test Method for Rubber Deterioration SurfaceOzone Cracking Outdoors or Chamber (Triangular Speci-mens)2D 1329 Test Method for Evaluating Rubber Property Retraction at Lower Temperatures (TR Test)2D 1349 Practice for Rubber Standard Temperatures forTesting2D 1418 Practice for Rubber and Rubber Latices Nomenclature2D 2137 Test Methods for Rubber Property BrittlenessPoint of Flexible Polymers and Coated Fabrics2D 2240 Test Method for Rubber Property DurometerHardness2D 3183 Practice for Rubber Preparation of Pieces for TestPurposes from Products2D 5964 Practice for Rubber IRM 902 and IRM 903 Re-placement Oils for ASTM No.

5 2 and ASTM No. 3 Oils23. The purpose of this classification System is to provideguidance to the engineer in the selection of practical, commer-cially available Rubber materials, and further to provide amethod for specifying these materials by the use of a simple1 This classification System is under the jurisdiction of ASTM Committee D-11on Rubber . The Non-Metallic standards Committee of SAE with on Classification of Rubber Compounds will jointly maintain D edition approved May 10, 1999. Published June 1999. Originallypublished as D 2000 62 T. Last previous edition D 2000 Book of ASTM standards , Vol ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.

6 Line call-out This classification System was developed to permit theaddition of descriptive values for future Rubber materialswithout complete reorganization of the classification systemand to facilitate the incorporation of future new test methods tokeep pace with changing industry Type and The prefix letter M shall be used to indicate that theclassification System is based on SI Call outs not prefixed by the letter M refer to an earlierclassification System based on inch-pound units. This was published ineditions up to Rubber materials shall be designated on the basis oftype(heat resistance) andclass(oil resistance). Type and class areindicated by letter designations as shown in Table 1 and Table2 and illustrated in based on changes in tensile strength of not morethan630 %, elongation of not more than 50 %, and hardnessof not more than615 points after heat aging for 70 h at anappropriate temperature.

7 The temperatures at which thesematerials shall be tested for determining type are listed in based on the resistance of the material toswelling in ASTM Oil No. 3 after 70-h immersion at atemperature determined from Table 1, except that a maximumtemperature of 150 C (the upper limit of oil stability) shall beused. Limits of swelling for each class are shown in Table ASTM No. 2 and No. 3 Oils have been replaced byIRM 902 and 903 Oils, respectively, under Practice D Oils are similar but not identical to ASTM No. 2 and Substitutability of IRM 902 and 903 Oils for ASTMNo. 2 and No. 3 Oils has not been established, as their swellingcharacteristics are different and may affect compound The selection of type based on heat resistance is understood tobe indicative of the inherent heat resistance that can be normally expectedfrom commercial compositions.

8 Likewise, choice of class is based on therange of volume swell normally expected from such commercial compo-sitions as established by fact that a type and class of material islisted in Table 6, under Basic Requirements, indicates that materials thatmeet these requirements for heat and oil resistance are The letter designations shall always be followed by athree-digit number to specify the hardness and the tensilestrength for example, 505. The first digit indicates durometerhardness, for example, 5 for 5065, 6 for 6065. The next twodigits indicate the minimum tensile strength for example, 05for 5 MPa, 14 for 14 of available materialsfor desired hardness and tensile strength is obtained throughthe elongation values in Table Grade Numbers, Suffix Letters, and Numbers Since the basic requirements do notalways describe sufficiently all the necessary qualities, provi-sion is made for deviation or adding requirements through asystem of prefix grade numbers.

9 Grade No. 1 indicates thatonly the basic requirements are compulsory, and no suffixrequirements are permitted. Grades other than No. 1 are usedfor expressing deviation or additional requirements and arelisted as Available Suffix Grade Numbers in the last columnunder Basic Requirements in Table 6. A grade number iswritten as a material prefix preceding the letters for type andclass (see ). x Letters The suffix letters that may be used,together with their meaning, appear in Table x Numbers Each suffix letter should preferably befollowed by two suffix numbers (see Note 6 in ).The firstsuff x number always indicates the test method;time of test ispart of the method and is taken from the listings in Table suff x number, if used, always indicates the temperatureof testand is taken from Table 5.

10 Where three-digit numbersare required, they are separated by a dash for example: 10;B4 10; F1 1 Basic Requirements for Establishing Type byTemperatureTypeTest Temperature, CA70B100C125D150E175F200G225H250J275K300 TABLE 2 Basic Requirements for Establishing Class by VolumeSwellClassVolume Swell, max, %Ano requirementB140C120D100E80F60G40H30J20K1 0 TABLE 3 Meaning of Suffix LettersSuffix LetterTest RequiredAHeat ResistanceBCompression SetCOzone or Weather ResistanceDCompression-Deflection ResistanceEAFluid Resistance (Aqueous)EFFluid Resistance (Fuels)EOFluid Resistance (Oils and Lubricants)FLow-Temperature ResistanceGTear ResistanceHFlex ResistanceJAbrasion ResistanceKAdhesionMFlammability ResistanceNImpact ResistancePStaining ResistanceRResilienceZAny special requirement, which shall be specified in detailD 200026.