1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 12 07 Revised and Retyped was: 8 pages1986 01 20 SM/EQ5583TP ReleasedWP 3948-a Page 1 of 4 GASKET, CELLULOSIC FIBERS AND SYNTHETIC RUBBER ESK-M8G197-A1. SCOPEThe material defined by this specification
2、are cellulosic fibers withsynthetic resin binder and NBR impregnation.2. APPLICATIONThis material was originally released for carburetor gaskets.3. REQUIREMENTSNote: The requirements of this specification are valid for gasket materialof 1.0 - 1.7 mm thickness.3.1 COMPRESSIBILITY 20 - 35 %(ASTM F 36,
3、 Procedure G)3.2 RECOVERY, min 40 %(ASTM F 36, Procedure G)3.3 TENSILE STRENGTH(ASTM F 152, conditioning according to type 3material, procedure according to Method C;test specimen: ASTM D 412, Die A; testtemperature 23 +/- 2 C)3.3.1 With Machine Direction, min 15 MPa3.3.2 Across Machine Direction, m
4、in 10 MPa3.4 THICKNESS CHANGE AFTER IMMERSION IN LIQUIDS(ASTM F 146, conditioning according to type 3material, test duration 22 h; test temperature23 +/- 2 C)Test Fluid Thickness Increase, max3.4.1 ASTM Oil No.3 8 %3.4.2 ASTM Fuel C 15 %3.4.3 Distilled Water 30 %ENGINEERING MATERIAL SPECIFICATIONESK
5、M8G197-AWP 3948-b Page 2 of 4 3.5 Resistance to ASTM Fuel CASTM F 146, conditioning according to type 3. T est has to be startedon Mond ay. Use a suitable distillation flask (test fluid quantity10 00 mL) and a reflux condenser for immersion of test specimensaccording to following test sequence:8 h
6、at 50 +/- 2 C16 h storage at room temperatur (immersed in test fluid)This cycle is to be rep eated three times followed by 8 h at 50 C and64 h at room temperature. After this time the cycle of 8 h at 50 Cand 16 h at room temperature is to be repeated four times.3.5.1 Compressibility, max 40 %(ASTM F
7、 36, Procedure G)3.5.2 Recovery, min 30 %(ASTM F 36, Procedure G)3.5.3 Change of Tensile Strength(ASTM F 152, procedure according toMethod C; test specimens ASTM D 412,Die A)3.5.3.1 With Machine Direction, max - 80 %3.5.3.2 Across Machine Direction, max - 80 %3.6 RESISTANCE TO ASTM FUEL C PLUS METHA
8、NOL(85 vol. % Fuel C plus 15 vol. % Methanol)Test Method according to para 3.5.3.6.1 Compressibility, max 45 %(ASTM F 36, Procedure G)3.6.2 Recovery, min 35 %(ASTM F 36, Procedure G)3.6.3 Change of Tensile Strength(ASTM F 152, procedure according toMethod C; test specimen: ASTM D 412, Die A)3.6.3.1
9、With Machine Direction, max - 85 %3.6.3.2 Across Machine Direction, max - 85 %ENGINEERING MATERIAL SPECIFICATIONESK-M8G197-AWP 3948-b Page 3 of 4 3.7 COMPRESSION SET, max 45 %(ASTM D 395, Method A; 22 hours at 70 +/- 2 C;conditioning according to ASTM F 146, type 3material; for measuring the origina
10、l thicknessof plied up discs use test device according toASTM F 36, penetrator diameter 6.3 mm, totalload on pressure foot 22.2 N: reading shallbe taken 30 seconds after loading)3.8 FLEXIBILITYNo cracks, breaks or surface separation.3.8.1 Original material (afte r conditioning according to para 3.3)
11、3.8.2 Materi al after being subjected ageing test in Fuel C plusMethanol (para 3.6)Test Method:Three samples (25 x 150 mm) of each direction (with andacross m achine direction) are to be subjected to each testcondition according to para 3.8.1 and 3.8.2.Mandrel diameter for test according to para 3.8
12、1 and 3.8.2shall be 12 times the thickness of the material.Firmly hold the sample of one point on a circula r mandrel andforce slowly but firmly under finger pressure to contact thefull diameter of mandrel.Failure shall be any cr acks, breaks or surface separation atthe end of the approxim ate time
13、 (5 +/- 1 second) required toflex the samples.Duri ng and after flexibility test when samples have beenbrought in a straight position no signs of delam ination shalloccur.3.9 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l anal
14、ysis 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 produce IR spectraand thermograms that correspond to the r
15、eference standard when testedunder the same conditions.3.10 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 Specification WSS-M99P9999-A2.ENGINEERING MATERIAL SPECIFI
16、CATIONESK-M8G197-AWP 3948-b Page 4 of 4 3.11 REQUIREMENTS FOR THE FINISHED PARTSAs specified on Engineering drawing.3.12 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to
17、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 specificationrequir ements, the Supplier shall notify Purchasing, Toxicolog
18、y 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.Substance restrictions imposed by law, regulations or Ford, apply t
19、othe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof the
20、i 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 laboratory test reports, signed by aqualified and authori
21、zed 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.
