1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 12 14 Revised and Retyped was: 7 pages1985 09 24 SM/EQ 5569 TP ReleasedWP 3948-a Page 1 of 4 GASKET MATERIAL, CELLULOSIC FIBERS AND ESK-M8G189-ASYNTHETIC RUBBER1. SCOPEThe materials defined by this spe
2、cification are cellulosic fibers bondedwith Nitrile Butadiene Rubber (NBR).2. APPLICATIONTh is specification was released originally for material used forTransmission Gaskets.3. REQUIREMENTSNote: The requirements of this specification are valid for gasket materialof 0.2 - 1.0 mm thickness. Mac hine
3、direction is to be marked on each testsheet.3.1 COMPRESSIBILITY 9 - 19 %(ASTM F 36, Procedure G)3.2 RECOVERY, min 45 %(ASTM F 36, Procedure G)3.3 TENSILE STRENGTH(ASTM F 152, conditioning according to type 3material, procedure according to Method C; tesspecimen: ASTM D 412, Die A; test temperature:2
4、3 +/- 2 C)3.3.1 With Machine Direction, min 28 MPa3.3.2 Across Machine Direction, min 20 MPa3.4 IMMERSION IN ASTM OIL NO. 1,22 h at 100 +/- 2 C(ASTM F 146, Material Type 3)3.4.1 Tensile Strength3.4.1.1 With Machine Direction 30 - 50 MPa3.4.1.2 Across Machine Direction 20 - 33 MPaENGINEERING MATERIAL
5、 SPECIFICATIONESK-M8G189-AWP 3948-b Page 2 of 4 3.4.2 Compressibility 9 - 19 %3.4.3 Recovery, min 45 %3.4.4 Weight Change + 20 to + 35 %3.4.5 Thickness Change - 2 to + 5 %3.5 IMMERSION IN ASTM OIL NO. 3,22 h at 100 +/- 2 C(ASTM F 146, Material Type 3)3.5.1 Tensile Strength3.5.1.1 With Machine Direct
6、ion 28 - 48 MPa3.5.1.2 Across Machine Direction 20 - 33 MPa3.5.2 Compressibility 9 - 19 %3.5.3 Recovery, min 45 %3.5.4 Weight Change + 20 to + 40 %3.5.5 Thickness Change - 1 to + 6 %3.6 COMPRESSION SET, max 20 %(ASTM D 395, Method A; 22 h at 100 +/- 2 C;conditioning according to ASTM F 146, type 3ma
7、terial; for measuring the original thicknessof plied up discs, use test device accordingto ASTM F 36, penetrator diameter 6.3 mm, total load on pressure foot 22.25 N, readingshall be taken 30 seconds after loading)3.7 ADHESION AND CORROSION(FLTM BV 123-01)3.7.1 After Heat Ageing at 120 C +/- 2 C3.7.
8、1.1 Adhesion, max Rating 23.7.1.2 Corrosion, max Rating 23.7.2 After Ageing in Humidity Cabinet3.7.2.1 Adhesion, max Rating 23.7.2.2 Corrosion, max Rating 2ENGINEERING MATERIAL SPECIFICATIONESK-M8G189-AWP 3948-b Page 3 of 4 3.8 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at
9、 its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produ
10、ce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.9 SUBSTANCE CONTROLLegal, health, safety a nd environmental constraints may apply to themate rials which are submitted for approval to this specification.Refer to Engineering Material Specif
11、ication SK-M99P9999-A.3.10 REQUIREMENTS FOR THE FINISHED PARTAs specified on Engineering Drawing.3.11 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change i
12、n the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected M
13、aterials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addr
14、essed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.ENGINEERING MATERIAL SPECIFICATIONESK-M8G189-AWP 3948-b Page 4 of 4 4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engine
15、ering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laborato
16、ry test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
