1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1994 01 05 NEO1E10127076110 Revised for Stainless E.J. Duda1993 02 17 NEO1E10127076079 Revised 3.7,was proc.B;Updated 3.12 E.J. Duda89-09-26 NEO1E10000474055 Released E. J. Duda 9-20-89WP 3948-a Pag
2、e 1 of 4 GASKET, STEEL CORE, COMPRESSED GRAPHITE SHEET WSE-M8G227-AGASKET, STEEL CORE, RUBBER ENCAPSULATED, COMPRESSED WSE-M8G227-A2GRAPHITE SHEET1. SCOPEThe material defined by these specifications is a gasketing materialcomprised of a solid or perforated low carbon steel or s tainless steel coreco
3、vered equally on both sides with a compressed graphite sheet.WSE-M8G227-A2 gasket composite is rubber encapsulated.2. APPLICATIONTh ese specification were released originally for material requiring highcompressive strength and high t emperature resistance such as cylinder headgasket(s). 3. REQUIREME
4、NTSNote : All tests shall be conducted in accordance with ASTM F 104 Type 7mat erial unless otherwise specified. Test specimens are to be selectedfrom finished gaskets when practicable.Prior to testing the materials shall be conditioned in an oven at 100 +/-2 C for 1 hour and allowed to cool to 21 t
5、o 30 C in a de siccator 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 required for material/source approval. Appropriatestatist ical tools must b
6、e 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 material/parts supplied to this specification.The IR spectra a
7、nd 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 standard when testedunder the same conditions.ENGINEERING MAT
8、ERIAL SPECIFICATIONWSE-M8G227-A/A2WP 3948-b Page 2 of 4 3.3 CONSTRUCTIONWSE- M8G227-A: The gasket consists of two equal and uniformcompressed graphite sheets which are mechanicall y bonded to each sideof a pe rforated tin plate, low carbon or stainless steel core.Perforations and the th ickness of t
9、he graphite sheets and steel coreas specified on engineering drawing.WSE-M8 G227-A2: The gasket consists of two equal and uniformcompressed graphite sheets which are glued to each side of a lowcarbon steel core. The composite is further encapsulated with anitrile and/or silicone rubber coating follo
10、wed by a release coatingof teflon. The thickness of the graphite sheets and steel core asspecified on engineering drawing.3.3.1 Metal CoreTin plate, low carbon or stainless steel. Thickness andperforations as specified on engineering drawings.3.3.2 FabricationTh e compressed graphite sheet shall be
11、plied uniformly andbonded to each side of the metal core to meet re quirements ofth e application, the thickness as specified on theengineering drawing.3.4 ORIGINAL PROPERTIES A A23.4.1 Ash Content, Graphite Only, max 6.0 % 6.0 %(ASTM C 561, 60 minutes at 950 +/- 20 C)3.4.2 Compressibility 6 to 30 %
12、 7 to 30 %(ASTM F 36, Procedure A)3.4.3 Recovery, min 25 % 20 %(ASTM F 36, Procedure A)3.4.4 Sulfur Content, Graphite Only, max 1000 ppm 1000 ppm(ASTM C 816)3.4.5 Leachable Chloride, Graphite Only, max 50 ppm 50 ppm(ASTM D 512)3.5 SEALABILITY, max 1.2 mL/h 1.2 mL/h(ASTM F 37, 6.9 MPa flange load, 0.
13、101 MPa internal pressure)ENGINEERING MATERIAL SPECIFICATIONWSE-M8G227-A/A2WP 3948-b Page 3 of 4 A A23.6 CREEP RELAXATION, max 20 % 25 %(ASTM F 38, Method B, 22 h at 175 +/- 2 C)3.7 HEAT AGING(ASTM D 573, 22 h at 175 +/- 2 C)3.7.1 Compressibility 8 to 31 % 7 to 30 %(ASTM F 36, Procedure A)3.7.2 Reco
14、very, min 20 % 22 %(ASTM F 36, Procedure A)3.7.3 Weight Change, max - 17 % - 17 %3.8 RESISTANCE TO OIL No. 1(ASTM F 146, 5 h at 150 +/- 2 C.) 3.8.1 Thickness Change 0 to 10 % 0 to 6 %3.8.2 Weight Change 0 to 20 % 0 to 18 %3.9 RESISTANCE TO OIL No. 3(ASTM F 146, 5 h at 150 +/- 2 C.) 3.9.1 Thickness C
15、hange 0 to 10 % 0 to 8 %3.9.2 Weight Change 0 to 20 % 0 to 20 %3.10 RESISTANCE TO FUEL C + METHANOL*(ASTM F 146, 22 h at 23 +/- 2 C,85 vol. % Fuel C + 15 vol. % methanol)3.10.1 Thickness Change 0 to 10 % 0 to 18 %3.10.2 Weight Change 5 to 20 % 1 to 20 %*Void this requirement if gasket is coated with
16、 silicon.3.11 RESISTANCE TO COOLANT & WATER (50:50)(ASTM F 146)Test Meth od: Immerse the sample in engine coolant WSE-M97B44-B anddistilled water (50:50 Vol. %). Use a suitable distilla tion flask anda reflux condenser and reflux for 70 hours at boiling temperature.3.11.1 Thickness Change 0 to 5 % 0
17、 to 5 %3.11.2 Weight Change 6 to 22 % 1 to 18 %ENGINEERING MATERIAL SPECIFICATIONWSE-M8G227-A/A2WP 3948-b Page 4 of 4 3.12 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar acteristics to the material upon which approval was originallygranted.Prio r
18、to making any change in the properties, composition,construction, color, processing or labeling of the mater ial originallyapproved under this specificati on, whether or not such changes affectthe materials ability to meet the specification requirements, theSupplier shall notify Purchasing, Toxicolo
19、gy and the affectedMaterials Engineering activity of the proposed changes and obtain thewritten approval of the Materials Engineering activity. Test data,test sam ples and a new code identification are to be submitted withthe request.Substa nce restrictions imposed by law, regulations or Ford, apply
20、 toth e materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofth
21、eir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringact ivity a completed copy of their laboratory test reports, signed by aqualified and autho
22、rized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specification (testresults, not nominal values), t he material designation and code number, andtest spec imens for Ford evaluation. Fords engineering approval of amateria l will be based on its performance to this specification and on anassess ment of suitability for intended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.
