1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1991 04 23 NE01E10127076008 Released E. J. DudaWP 3948-a Page 1 of 4 GASKET, STEEL CORE, COMPRESSED NON-ASBESTOS WSE-M8G239-ASHEET1. SCOPEThe material defined by this specification consists of a non-asbestos shee
2、twith a sy nthetic rubber binder secured equally on both sides of a lowcarbon steel core.2. APPLICATIONThis specification was released originally for material used for exhaustmanifold gaskets where a material with high compressive strength at hightemperatures is required.3. REQUIREMENTSNote : All te
3、sts shall be conducted in accordance with ASTM F 104 Type 7material unless otherwise specified. The requirements of this specificationare va lid for gasket material of 0.7 to 1.6 mm thickness. Test specimensare to be selected from finished gaskets when practicable.Prior to testing the materials shal
4、l be conditioned in an oven at 100 +/-2 C for 1 h and allowed to cool to 21 - 30 C in a desiccator containinganhydrous calcium chloride.3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is
5、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 its option, may conduct infrared and/ortherma l
6、 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 produce IR spectraand thermograms that correspond to
7、the reference standard when testedunder the same conditions.ENGINEERING MATERIAL SPECIFICATIONWSE-M8G239-AWP 3948-b Page 2 of 4 3.3 CONSTRUCTIONConsis ts of a low carbon steel core with a sheet consisting ofsynthetic elastomeric b inders and non-asbestos reinforcing compoundsbonded or clinched to ea
8、ch side of the steel core.3.3.1 Steel CoreLow carbon steel, thickness as specified on engineeringdrawing.3.3.2 Non-Asbestos Sheet and SyntheticRubber BinderThe non-asbestos sheet shall be plied uniformly and bonded orclinched to each side of the steel core to meet therequirements of the application
9、at the thickness specified onthe engineering drawing.3.4 ORIGINAL PROPERTIES3.4.1 Compressibility 10 - 25 %(ASTM F 36, Procedure A)3.4.2 Recovery, min 45 %(ASTM F 36, Procedure A)3.5 SEALABILITY, max 40 mL/h(ASTM F 37, 6.9 MPa flange load, 0.101 Mpa internal pressure)3.6 CREEP RELAXATION, max 50 %(A
10、STM F 38, Method B, 22 h at 150 +/- 2 C)3.7 HEAT AGING(ASTM D 573, 22 h at 250 +/- 2 C)3.7.1 Compressibility 15 - 28 %(ASTM F 36, Procedure A)3.7.2 Recovery, min 38 %(ASTM F 36, Procedure A)3.7.3 Weight Change, max - 6.5 %3.8 RESISTANCE TO OIL No. 1(ASTM F 146, 5 h at 150 +/- 2 C)3.8.1 Thickness Cha
11、nge, max + 10 %3.8.2 Compressibility 16 - 30 %ENGINEERING MATERIAL SPECIFICATIONWSE-M8G239-AWP 3948-b Page 3 of 4 3.9 RESISTANCE TO OIL No. 3(ASTM F 146, 5 h at 150 +/- 2 C)3.9.1 Thickness Change, max + 18 %3.9.2 Compressibility 22 - 35 %3.10 RESISTANCE TO FUEL C + METHANOL(ASTM F 146, 22 h at 23 +/
12、 2 C, 85 vol. % Fuel C + 15 vol. % methanol)3.10.1 Thickness Change, max + 30 %3.10.2 Compressibility 25 - 38 %3.11 RESISTANCE TO COOLANT & WATER (50:50)(ASTM F 146)Test Method: Immerse the sample in engine coolant WSE-M97B44-B anddistilled water (50:50 vol. %). Use a suitable d istillation flask a
13、nda reflux condenser and reflux for 70 hours at boiling temperature.3.11.1 Thickness Change, max + 45 %3.11.2 Compressibility 30 - 45 %3.11.3 Weight Change, max + 42 %3.12 SURFACE ADHESION Must not stick or show anyevidence of corrosion. Metal Plates. Aluminum to Aluminum. Aluminum to Steel. Steel t
14、o SteelTest Method: A 16 mm I D x 38 mm OD test specimen is clamped between2 discs of 13.5 mm ID x 50 mm steel plates (maximum thickness 1.57mm) backed by 13 mm steel plates. A 13 mm steel bolt is insertedthrough the hole and a nut put on it. Tighten the bolt to 79 N.m.Heat the assembly to 149 +/- 3
15、 C for 5 h. Remove and allow to cool toro om temperature. The specimen shall come off the metal plateswi thout tearing and the metal plates must show no evidence ofcorrosion.3.13 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the mat
16、erial upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSE-M8G239-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 suc
17、hchange s affect the materials ability to meet the specificationrequir 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 n
18、ew code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is sp
19、ecified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffe
20、c 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, demonstratingful l compliance
21、 with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. In addition to meeting therequi rements of this specification, the materials will be assessed forsuita bility for intended applications as part of the approval process.Upo n approval, the material will be added to the Engineering MaterialApproved Source List.
