1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1989 11 07 SM/EQ4967 TP Released D-MB/PQ-13 B.LangeWP 3948-a Page 1 of 4 SEALER, RTV SILICONE RUBBER WSK-M4G320-A1. SCOPEThe material defined by this specification is a one component, roomtemperature vulcanizing
2、silicon e rubber adhesive/sealer with good heat andoil resistance.2. APPLICATIONTh is specification was released originally for material used forformed-i n-place gaskets at engine oil pan and T-joints at cylinder blockand oil pump.3. REQUIREMENTSAll values quoted in this specification are calculated
3、 from the mean ofthre e readings. The three readings shall be within +/- 15 % of the meanvalue. Where necessary repeat tests shall be done until this requirementis satisfied. To improve the reproducibility of results every effort shouldbe m ade to exclude air bubbles from the test specimens. It may
4、be foundhelpful to apply a low level va cuum to the freshly cast test specimens forno more than 2 minutes.All va lues indicated under paragraphs 3.5 to 3.10.2 are based on materialtest specimens which have been cured for 7 days at 23 +/- 2 C and 50 %relative humidity before testing.3.1 STATISTICAL P
5、ROCESSSupplie 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
6、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 and thermograms established for i nitial approval shallconst itute the referen
7、ce 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.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G320-AWP 3948-b Page 2 of 4 3.3 CONDITIONING AND TES
8、T CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 VISCOSITY(FLTM BV 103-01)Where the visco
9、sity of the uncured material is critical with regardto the application process as identified by Manu facturing Engineeringthen the value of the v iscosity shall be maintained within +/- 20 %of the value originally approved by the affected manufacturingdivision.3.5 HARDNESS, DUROMETER A 20 - 27(ASTM
10、D 2240, 15 s dwell, ply upspecimens to 6 mm total thickness)3.6 BREAKING STRENGTH(ASTM D 412, Die C, material thickness 2 mm)3.6.1 Original, min 1 MPa3.6.2 After Immersion in ASTM No. 3 Oil, min 400 kPa(ASTM D 471, 16 h at 150 +/- 2 C, testafter 1 h at room temperature)3.7 ELONGATION, min 300 %(ASTM
11、 D 412, Die C, material thickness 2 mm)3.8 VOLUME SWELL AFTER IMMERSION IN ASTM NO. 1 +/- 10 %OIL, max(ASTM D 471, 16 h at 150 +/- 2 C, test after1 h at room temperature, sample approx. 50 x13 x 2 mm)Note: Samples may be cast on polyethylene film to permit easy removal.3.9 PEEL STRENGTH, min 25 N/cm
12、(FLTM BV 154-03, method C, originaldegreased panels)3.10 PEEL STRENGTH, OILED PANELS(FLTM BV 154-03, method C, original oiledpanels acc. to FLTM BZ 150-11)3.10.1 Original, min 12 N/cm3.10.2 After Heat Aging, min 30 N/cm(14 days at 80 +/- 2 C air temperature,test after 1 h at room temperature)ENGINEE
13、RING MATERIAL SPECIFICATIONWSK-M4G320-AWP 3948-b Page 3 of 4 3.10.3 After Immersion in ASTM No. 3 Oil, min 10 N/cm(ASTM D 471, 16 h at 150 +/- 2 C,test after 1 h at room temperature3.11 ADHESION STRENGTH(FLTM BV 154-03, method A, normal oiled surfaceaccording to FLTM BZ 150-11, X = 1 mm)3.11.1 Origi
14、nal, min 0.25 MPa3.11.2 After Heat Aging, max 1.30 MPa(14 days at 80 +/- 2 C air temperature,test after 1 h at room temperature3.12 TOTAL SILICONE VOLATILE, max 0.6 %(FLTM AV 102-01)3.13 STORAGE STABILITY, min 6 months(From date of receipt at Ford)When stored in sealed unopened containers out of dir
15、ect sunlight atambient temperatures between 5 C and 32 C.The supplier must label each container to indica te expiration date ofthe material and production usage beyond expiration date is notpermitted.3.14 QUALITYThe material shall be of uniform quality, free f rom foreign materialsand properties det
16、rimental to normal production use.3.15 NON-INTERCHANGEABILITY OF MATERIALSOnly approved materials all from the same production source shall beused in conjunction with one another.3.16 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engine
17、ering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be clearly designated on the Engineeringdrawing.3.17 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristi
18、cs to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G320-AWP 3948-b Page 4 of 4 Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, whe
19、ther or not suchchange 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, test s
20、amples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford isap plicable to the materials addressed by this document. Therestrictions are defined in Engineering Material SpecificationWSS-M99P9999-A1, unless a different suffix (
21、e.g., A2 or A3) isspecified on the engineering document 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
22、interest from theaffect ed Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and test
23、specimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 CURINGUpon exposure to atmospheric humidity, the material begins to cureimmediately on the surface and progresses inward.A tack-free skin will f orm in 10 - 30 min. The release of traces ofacetic acid into the atmosphere during the curing process is normalfor some types of sealant.
