1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name File Control No. Specification NumberDate Action Changes1989-04-07 SM/EQ15817 TP Released M. SiewertWP 3948-a Page 1 of 4 GASKET, STEEL CORE, ARAMIDE FIBER SHEET SMT5008GA8700 WSK-M8G222-A1. SCOPEThe ma terials defined by this specification consist of
2、 a low carbon steelcore c overed equally on both sides with a synthetic rubber bonded aramidefiber fa cing. The assembly is coated with a barrier, anticorrosive andantistick coating.2. APPLICATIONThis specification was released originally for cylinder head gaskets.3. REQUIREMENTS3.1 STATISTICAL PROC
3、ESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is
4、continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at 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
5、standard and shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSPrior to testing, the materials shall be conditioned in an
6、oven at100 +/- 2 C for 1 h and allowed to cool to 23 +/ - 2 C in a desiccatorcontaining anhydrous ca lcium chloride. All tests shall be conductedin accordance with ASTM F 104, Type 1 material unless otherwisespeci fied. The requirements of this specification are valid forgasket material of 1.6 to 1.
7、8 mm thickness. Tes t specimens are to beselected from finished gaskets when practicable.ENGINEERING MATERIAL SPECIFICATIONWSK-M8G222-AWP 3948-b Page 2 of 4 3.4 CONSTRUCTIONConsi sts of a low carbon steel sheet with a material consisting ofaramide fibers and synt hetic rubber bonded to each side of
8、the steelsheet. The assembly is covered with a barrier anticorrosive sealingco at. Finally, an antistick coating is applied to the gasketassembly.3.4.1 Steel CoreLow ca rbon steel, thickness and finish as specified onEngineering Drawing.3.4.2 Facing MaterialThe aramide fiber sheet shall be plied uni
9、formly and bondedto e ach side of the steel core to meet requirements of theap plication at the thickness specified on the EngineeringDrawing.3.4.3 CoatingsCoatings of gasket as specified on Engineering Drawing.3.5 ORIGINAL PROPERTIES3.5.1 Ignition Loss of Facing Material 31 - 35 %(ASTM F 495)3.5.2
10、Compressibility 5 - 11 %(ASTM F 36, Procedure A)3.5.3 Recovery, min 50 %(ASTM F 36, Procedure A)3.6 SEALABILITY, max 1.8 mL/h(ASTM F 37, Method A, 3.5 MPa flange load,0.1 MPa internal pressure)3.7 CREEP RELAXATION, max 46 %(ASTM F 38, Method B, 22 h at 150 +/- 2 C.)3.8 ADHESION AND CORROSION(FLTM BV
11、 123-1)3.8.1 After Heat Aging at 150 +/- 2 CAdhesion, max Rating 3Corrosion, max Rating 1ENGINEERING MATERIAL SPECIFICATIONWSK-M8G222-AWP 3948-b Page 3 of 4 3.8.2 After Aging in Humidity CabinetAdhesion, max Rating 3Corrosion, max Rating 13.9 HEAT AGING(ASTM D 573, 22 h at 200 +/- 2 C)3.9.1 Compress
12、ibility 4 - 8 %3.9.2 Recovery, min 45 %3.10 RESISTANCE TO ASTM OIL No.1(ASTM F 146, 5 h at 150 +/- 2 C)3.10.1 Thickness Change 0 to + 6 %3.10.2 Compressibility 5 - 9 %3.10.3 Recovery, min 50 %3.10.4 After im mersion the facing material shall be firm and mustnot separate from the steel core.3.11 RESI
13、STANCE TO ASTM OIL No.3(ASTM F 146, 5 h at 150 +/- 2 C)3.11.1 Thickness Change 0 to + 8 %3.11.2 Compressibility 6 - 10 %3.11.3 Recovery, min 50 %3.11.4 After im mersion the facing material shall be firm and mustnot separate from the steel core.3.12 RESISTANCE TO ASTM 85% Fuel C + 15% Methanol(ASTM F
14、 146, 22 h at 23 +/- 2 C)3.12.1 Thickness Change 0 to + 18 %3.12.2 Compressibility 14 - 20 %3.12.3 Recovery, min 50 %3.12.4 After im mersion the facing material shall be firm and mustnot separate from the steel core.3.13 RESISTANCE TO COOLANT & WATER (50:50)Test method: Immerse in Engine coolant WSE
15、-M97B44-D and distilledwater (5 0/50 vol. %) by using a suitable distillation flask and areflux condenser for 70 h at boiling temperature.3.13.1 Thickness Change 0 to + 8 %3.13.2 Compressibility 5 - 10 %3.13.3 Recovery, min 50 %3.13.4 After im mersion the facing material shall be firm and mustnot se
16、parate from the steel core.ENGINEERING MATERIAL SPECIFICATIONWSK-M8G222-AWP 3948-b Page 4 of 4 3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in
17、 the properties, composition,co nstruction, color, processing or labelling 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
18、aterials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, test samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe mat erials addre
19、ssed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval b
20、y theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffect ed Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier shall submit to the affected Materials Engineeringactivity
21、its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. 5. GENERAL INFORMATIONThe information below
22、is provided for clarification and assistance inmeeting the requirements to the specification.5.1 For i nformation on currently approved engine coolants for use inmeeting the requirements to the specification.Materials Laboratory 13/100 Fluids Material SectionResearch and Engineering Centre Coolants/GreasesFord Motor Company Ltd Engine EngineeringLaindon, Basildon PO Box 2053Essex SS15 6EE, England 21500 Oakwood BoulevardDearborn, MI 48121, USAMaterials EngineeringProduct Engineering OfficeFord Motor Co. of Australia LtdPinces Highway, NorlaneVictoria 3214, Australia
