1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 12 07 Revised and Retyped 1986 07 25 SM/EQ5618TP ReleasedWP 3948-a Page 1 of 3 GASKET, ARAMIDE FIBRE SHEETS, REINFORCED ESK-M8G205-A1. SCOPEThe m aterial defined by this specification are synthetic rub
2、ber bondedaramide fibre sheets reinforced with a steel sheet core.2. APPLICATIONThis sp ecification was released originally for material used for intakemanifold gaskets.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually
3、 acceptable Control Plan as describedtherein is required for material/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
4、 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
5、ce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedaccording to ASTM F 104, material type 1, prior to testing and testedunder the same condit
6、ions unless otherwise specified.3.4 TEST SPECIMENS (Test Sheets)The requirements of thi s specification are valid for gasket materialof 0.8 - 1.5 mm thickness.ENGINEERING MATERIAL SPECIFICATIONESK-M8G205-AWP 3948-b Page 2 of 3 3.4.1 Material of CoreMetal mesh St 4 DIN 1624finish zinc plated3.4.2 Com
7、pressibility 5 - 13 %(ASTM F 36, Procedure A)3.4.3 Recovery, min 40 %(ASTM F 36, Procedure A)3.4.4 Immersion in ASTM Fuel C(ASTM F 146, tests according to type 1material, 22 h at 23 +/- 2 C)3.4.4.1 Compressibility 8 - 20 %3.4.4.2 Recovery, min 30 %3.4.4.3 Thickness Change + 4 to + 20 %3.4.4.4 After
8、immersion the f ibre sheets shall be firm andmust not separate from the core.3.4.5 Immersion in ASTM Oil No.3(ASTM F 146, tests according to type 1material, 22 h at 150 +/- 2 C)3.4.5.1 Compressibility 3 - 15 %3.4.5.2 Recovery, min 30 %3.4.5.3 Thickness Change 0 to + 10 %3.4.5.4 After immersion the f
9、 ibre sheets shall be firm andmust not separate from the core.3.4.6 Imm ersion in long life coolant concentrate according tosp ecification SS-M97B9103-A and distilled water (50:50) byus ing a suitable distillation flask and a reflux condenserfor 70 hours at boiling temperature. After immersion store
10、specimen s for 30 minutes at 23 +/- 2 C and 50 +/- 5 %relative humidity befor e testing. Tests according to type 1material.3.4.6.1 Compressibility 5 - 20 %3.4.6.2 Recovery, min 30 %3.4.6.3 Thickness Change 0 to + 20 %3.4.6.4 After immersion the f ibre sheets shall be firm andmust not separate from t
11、he core.ENGINEERING MATERIAL SPECIFICATIONESK-M8G205-AWP 3948-b Page 3 of 3 3.5 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 in the properties, comp
12、osition,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 Materials Engineering a
13、ctivity 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 addressed by this document
14、. 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 thei r materials shall first obtain an expre
15、ssion 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 authorized representative of the test faci lity,
16、 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.
