1、ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990 08 01 EP00E0103158000 Released F.O. Swanson J. SchultWP 3948-a Page 1 of 4 SEALANT, PRE-APPLIED THREAD NON-CURING WSK-M4G328-A1/A61. SCOPEThese products are highly filled water based acrylic latex emulsions.
2、Whendried, they become resilient, tightly adhered, non-curing sealing films fortapered or straight threads. PTFE (polytetrafluoroethylene) is suspendedin the film for thread lubrication and torque/tension control. The productis applied to the fastener in a band completely surrounding the desiredthre
3、ads. Drying of the film must immediately follow the coatingapplication, in 65 - 70 C ovens with high air flow, to ensure desired filmintegrity.2. APPLICATIONThese specifications were originally released for materials used to sealthreaded parts. These materials are used in engine applications to prev
4、entleakage due to vibration.A1 A low viscosity pre-applied acrylic latex thread sealant for flowcoating, cures into a soft film for low on-torque resistance,lubricant for controlled torque/tension, 177 C continuous usetemperature.A2 A low viscosity pre-applied acrylic latex thread sealant designed f
5、orflow coating onto fastener and fitting threads, cures into a hardtough film, high lubricity for controlled torque/tension, 150 Ccontinuous use temperature.A3 A low viscosity pre-applied acrylic latex thread sealant designed forflow coating onto fastener and fitting threads, cures into a hardtough
6、film, high lubricity for controlled torque/tension, 150 Ccontinuous use temperature.A4 A high viscosity pre-applied acrylic latex thread sealant for threadfilling and larger gap sealing, similar to A2 in all other respects.A5 A high viscosity pre-applied acrylic latex thread sealant for threadfillin
7、g and larger gap sealing, similar to A3 in all other respects.A6 A high viscosity pre-applied acrylic latex thread sealant for threadfilling and larger gap sealing, similar to A2 in all other respects./0550#&64&%03/&8%&4*(/4UBUVT /PSFQMBDFNFOUOBNFE -4JODMBJS /“ENGINEERING MATERIAL SPECIFICATIONWSK-M
8、4G328-A1/A6WP 3948-b Page 2 of 4 3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyz
9、e 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/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms es
10、tablished for initial approval shallconstitute the reference standard and shall be kept on file at thedesignated material laboratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITION
11、SAll test values indicated herein are based on material conditioned ina controlled 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(ASTM D 1084, Method B at 23 +3/- 2 C)Type B
12、rookfield Model Spindle RPM mPa.sWSK-M4G328-A1 RVF 4 20 400 - 1 200A2 RVF 4 20 4 000 - 9 000A3 RVF 4 20 4 000 - 7 000A4 RVT/RVF 6 20 20 000 - 35 000A5 RVF 6 10 20 000 - 40 000A6 RVF 6 10 30 000 - 50 000ENGINEERING MATERIAL SPECIFICATIONWSK-M4G328-A1/A6WP 3948-b Page 3 of 4 3.5 SEALABILITY(FLTM BV 12
13、7-01)WSK-M4G328-Initial After 4thType Application Re-assemblyA1 - A6 No leakage No leakage3.6 QualityThe material shall be a smooth homogeneous mixture, free from foreignmaterials and properties detrimental to normal production use.3.7 PROCESSThe coatings shall be applied as recommended by the appro
14、ved supplierbased on process and materials originally approved by the MaterialsEngineering Department. Process sheet to be on file at the approvingmaterials activity and at the adhesive applicator.3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufactured parts shall bespecifi
15、ed on the Engineering drawing, Engineering parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall
16、characteristics to the material upon which approval wasoriginally granted.Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet
17、 the specificationrequirements, 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 samples and a new code identification areto be submitted with t
18、he request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the applic
19、ation.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G328-A1/A6WP 3948-b Page 4 of 4 4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring approval oftheir materials shall first obtain an expression of i
20、nterest from theaffected Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity its own laboratory report to the specification (test results, notnominal values), the material designation and code number, and testspe
21、cimens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.5. GENERAL INFORMATIONThe information below is provided for clarification and assistance inmeeting the requirements of the specification.5.1 COLORTypeWSK-M4G328-A1 WhiteA2 WhiteA3 Burnt orangeA4 BlueA5 Burnt orangeA6 White5.2 FORD ENGINEERING MATERIAL SPECIFICATIONS - DOCUMENT CROSS-INDEXWorldwide NAAO EAOWSK-M4G328-A1 ESE-M4G208-A2 -A2 ESE-M4G208-A1 -A3 EST-M4G208-B2 -A4 - ESK-M4G263-A2A5 EST-M4G208-B1 -A6 - -
