1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1993 02 25 NT00E10196962000 Revised, Updated Para 4. T. P. Koch1990 09 14 NT00E10077193020 Released T. P. KochWP 3948-a Page 1 of 4 GASKET, CELLULOSE FIBER, NITRILE RUBBER, WSP-M8G237-ADIMENSIONALLY STABLE1. SCOP
2、EThe ma terial defined by this specification is a gasketing materialcompri sed of virgin cellulose, inorganic fibers and other fillers, bondedwith nitrile rubber, manufactured by a Fourdrinier papermaking process.2. APPLICATIONThis s pecification was released originally for material used in automati
3、ctransm ission valve body applications where dimensional stability anderosion resistance are required.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for materi
4、al/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of materi
5、al/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 produce IR spectraand thermograms that correspond to the reference stand
6、ard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSPrior to testing the materials shall be conditio ned for 4 h at 23 +/-2 C i n a closed chamber containing anhydrous calcium chloride as adesiccant. The air in the chamber shall be circulated by gentlemechanical agitation. S
7、pecimens shall then be tr ansferred immediatelyto a controlled humidity room and conditioned fo r at least 20 h at 23+/- 2 C and 50 +/- 5 % relative humidity. All tests shall be conducted in accordance with ASTM F 104 Type 3material unless otherwise specified. Test specimens are to beselected from f
8、inished gaskets when practicable.ENGINEERING MATERIAL SPECIFICATIONWSP-M8G237-AWP 3948-b Page 2 of 4 Thickness Range3.4 ORIGINAL PROPERTIES, mm 0.19 to 0.28 0.34 to 0.423.4.1 Density 1.02 to 1.25 0.96 to 1.12(ASTM D 297)3.4.2 Tensile Strength, 30 25MPa, min(ASTM F 152, Method C)3.4.3 Compressibility
9、 % 6 to 16 8 to 18(ASTM F 36, Procedure G)3.4.4 Recovery, %, min 65 65(ASTM F 36, Procedure G)3.5 SEALABILITY, mL/h, max 25 35(ASTM F 37, 6.3 MPa flangeload, 0.7 MPa (internalpressure, Method B, Fuel A)3.6 CREEP RELAXATION, %, max 25 38(ASTM F 38, Method B, 22 h at 150 +/- 2 C)3.7 ADHESION, max Rat
10、ing 2 Rating 2(FLTM BV 123-01)3.8 DIMENSIONAL STABILITYHigh Humidity, wmd, %, + 0.2 + 0.2max changeHigh Humidity, amd, %, + 1.9 + 1.9max changeLow Humidity, wmd, %, - 0.25 - 0.25max changeLow Humidity, amd, %, - 0.50 - 0.50max change3.9 HEAT AGING(ASTM D 573, 168 h at 150 +/- 2 C)3.9.1 Compressibili
11、ty, % 3 to 15 3 to 15(ASTM F 36, Procedure B)3.9.2 Recovery, %, min 55 55(ASTM F 36, Procedure B)3.9.3 Weight Change, % - 6 to + 10 - 6 to + 10ENGINEERING MATERIAL SPECIFICATIONWSP-M8G237-AWP 3948-b Page 3 of 4 Thickness Range3.10 RESISTANCE TO ASTM OIL No. 1(ASTM F 146, 5 h at 150 +/- 2 C.)3.10.1 C
12、ompressibility, % 5 to 15 8 to 183.10.2 Thickness Change, % - 5 to + 5 - 5 to + 53.10.3 Weight Change, % + 10 to + 25 + 20 to + 353.11 RESISTANCE TO ASTM OIL No. 3(ASTM F 146, 5 h at 150 +/- 2 C.)3.11.1 Compressibility, % 5 to 15 8 to 183.11.2 Thickness Change, % - 8 to + 5 - 8 to + 53.11.3 Weight C
13、hange, % + 10 to + 30 - 18 to + 383.12 RESISTANCE TO COOLANT AND WATER (50:50)(ASTM F 146)Test Method: Immerse the sample in Engine coolant WSE-M97B44-D anddistilled water (50:50 Vol. %). Use a suitable d istillation flask anda reflux condenser and reflux for 70 h at boiling temperature.3.12.1 Compr
14、essibility, % 20 to 40 20 to 403.12.2 Thickness Change, % 20 to + 60 + 20 to + 603.12.3 Weight Change, % + 60 to + 95 + 60 to + 953.12.4 Flexibility 25X 25X3.13 RESISTANCE TO AUTOMATIC TRANSMISSION FLUIDS (ASTM F 146, 168 hours at 150 +/- 2 C)3.13.1 Compressibility, % 6 to 16 6 to 163.13.2 Thickness
15、 Change, % - 6 to + 5 - 6 to + 53.13.3 Weight Change, % + 10 to + 25 + 17 to + 323.13.4 Flexibility 75X 75X3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIA
16、L SPECIFICATIONWSP-M8G237-AWP 3948-b Page 4 of 4 Pri or to making any change in 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 specificationreq
17、uir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials 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.Substanc
18、e restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Material
19、s Engineeri ng activity. Suppliers desiring approval ofthe ir 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
20、 laboratory 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 i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
