1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1993 12 16 NT0010336473000 Released T. KochWP 3948-a Page 1 of 2 SCREEN, POLYESTER, MONOFILAMENT, 120 MICROMETER WSP-M9H137-AMESH OPENING1. SCOPEThe mate rial defined by this specification is a woven screen
2、 constructedin a plain square weave using p olyester monofilament thread with a nominal120 micrometer mesh opening.2, APPLICATIONThi s specification was released originally for material used as a valvebody filter sandwiched between gaskets for automatic transmissions.3. REQUIREMENTS3.1 STATISTICAL P
3、ROCESSSupplie 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 be used to analyze process/product data sothat variation in the final product i
4、s 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 referenc
5、e 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.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial c
6、onditioned 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 SPECIFIC GRAVITY, range 1.36 - 1.40(ASTM D 792)ENGINEERING MATERIAL SPECIFICATIONWSP-M9H137-AWP 3948-b Page 2
7、 of 2 3.5 MELTING POINT, average 240 - 250 C(ASTM D 276)3.6 THREAD DIAMETER, range 84 - 92 micrometer3.7 MESH COUNT, range 45 - 52/10 mm3.8 WEIGHT, range 73 - 77 g/m23.9 MESH OPENING, range 112 - 128 micrometer3.10 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivale
8、nt inal l characteristics to the material upon which approval wasoriginally granted.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 suchchange s affect the materials a
9、bility 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 new code identification areto be
10、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 WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior
11、approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineerin
12、gactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
