1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1993 10 01 NB00I10043054285 Released W.Curtiss E.Rezendes M.PerchardWP 3948-a Page 1 of 5 SEALING REQUIREMENTS, NON-DRYING MASTIC, WSB-M18P15-ASEALED LAMP SOCKETS1. SCOPEThi s specification defines
2、the sealing requirements for specific sealedlamp s ocket applications using a non-drying, asbestos-free mastic pottingcompou nd consisting of a synthetic and natural oil base with other fillermaterials.2. APPLICATIONThis spe cification was released originally for material used as a masticsea ler in
3、lamp socket applications to provide sealing properties whenexposed to weathering condition s on vehicles. This material does not dry,crack or sag after extended use and is compatible with the socketcomponents to which it comes in contact.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform
4、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 is continuously reduced.3.2 INF
5、RARED 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 reference standard and shall be kept o
6、n 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 conditioned ina control led atm
7、osphere 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.ENGINEERING MATERIAL SPECIFICATIONWSB-M18P15-AWP 3948-b Page 2 of 5 3.4 SAG AND WEATHERING RESISTANCESha ll not sag, dry, crack or separate oil
8、 when subjected to thefollowing conditions.3.4.1 2 h at - 40 +/- 1 C3.4.2 2 h at 93 +/- 1 C3.4.3 100 h at 70 +/- 1 CTest Method:. Prepare and test a minimum of three test panels per testcondition. Apply a ribbon of ma terial 13 x 200 x 7 mm to a clean CRSpanel. Cut off the ribbon on both ends to eli
9、minate necking. Scribe the panel to mark the initial position of thematerial. Position the panel horizontally and subject the panel tothe environments listed above. Examine the panel after the exposure and note anydeleterious effects.3.5 EXPANSION/SHRINKAGETest Temperature Volume Expansion/Shrinkage
10、3.5.1 At 49 +/- 2 C 0 - 6 %Recovery to 23 +/- 2 C 0 - 2 %3.5.2 At 100 +/- 2 C 5 - 15 %Recovery to 23 +/- 2 C 0 - 2 %Test Method:. Fill an ointment tin (53 mm O.C. x 40 mm deep) with thetest material. Avoid entrapment of air. Record the depth of the test material prior to exposure(D1) within +/- 1 mm
11、. Expose the prepared sample to the above test temperaturesfor 1 h, 6 h, and 6 days. Immediately upon removal from the test temperature, measurethe height of the test material (D2). Allow the sample to cool to 23 +/- 2 C for 4 h minimum andmeasure the material height (D3).ENGINEERING MATERIAL SPECIF
12、ICATIONWSB-M18P15-AWP 3948-b Page 3 of 5 . Record % Volume Expansion/Shrinkage of material immediatelyupon removal from test temperature and after sample hascooled to 23 +/- 2 C.% Volume Expansion/Shrinkage = (D2 or D3) - D1 x 100D13.6 TEMPERATURE OF EXPANSION Material shall not foam below 95 CTest
13、Method:. Fill an ointment tin (53 mm O.D. x 40 mm deep) with the testmaterial. Avoid entrapment of air. Place the sample in an oven at 50 +/- 2 C for 30 minutes. Raise the oven temperature 15 +/- 2 C every 15 minutes and visuallyinspect for signs of foaming or expansion at the end of each 15minute p
14、eriod. Discontinue test when foaming or expansion occurs or aftercompletion of exposure period at 110 +/- 2 C. Record the temperature at which foaming occurs or indicate “NoFoaming“.3.7 LOW TEMPERATURE FLEXIBILITY Material shall not crackTest Method:. Apply a ribbon of sealer 13 x 200 x 7 mm to alum
15、inum foil. Expose the foil and material to - 40 +/- 1 C for 12 h. Bend 90 deg around a 13 mm mandrel conditioned at - 40 +/- 1 C.3.8 MATERIAL REQUIREMENTSA ne w supplier being evaluated for initial approval to thisspe cification shall report the physical and chemical properties oftheir material in a
16、ccordance with para 3.1. Ref er to section 5.1 fortest parameters and conditions to be evaluated.3.9 PERFORMANCE REQUIREMENTS OF SOCKET AND LAMP ASSEMBLYIn addi tion to the requirements listed in this specification, thesoc ket mounted in lamp assembly shall meet all engineeringsp ecification require
17、ments of ES-COAF-14A121-A for electricalcontinuity, sealant migration, air leaks, compatibility with allmaterials that the sealer contacts and durability.ENGINEERING MATERIAL SPECIFICATIONWSB-M18P15-AWP 3948-b Page 4 of 5 3.10 FUNCTIONAL APPROVALMaterials being evaluated for approval to this s pecif
18、ication shall besubject ed to a production trial. Functional trial results must beapproved by the affected assembly operation and Design Engineering.Results shall be made available to Materials Engineering prior tomaterial approval and release.3.11 ADDITIONAL REQUIREMENTSSpecific requirements for ma
19、terial and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respectto these properties shall be clearly designated on the engineeringdrawing.3.12 SUPPLIERS RESPONSIBILITYAll materials suppl
20、ied to this specification must be equivalent 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
21、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, t est sampl
22、es and a new 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
23、 A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest fr
24、om theaffec 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
25、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 suit
26、ability for i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.ENGINEERING MATERIAL SPECIFICATIONWSB-M18P15-AWP 3948-b Page 5 of 5 5. GENERAL INFORMATIONThe information below is provided for clarification and assistance
27、inmeeting the requirements of this specification.5.1 MATERIAL REQUIREMENTS Shall be established prior tomaterial approval5.1.1 Color5.1.2 Flash Point, C(ISO 2592/ASTM D 92, Cleveland Open Cup)5.1.3 Specific Gravity(ASTM C 461)5.1.4 Solids, %(ASTM D 1489)5.1.5 Thermal Conductivity(Cemco-Fitch apparat
28、us)5.1.6 Viscosity, MPa(ISO 4575/ASTM D 1823, using Castor-Servers Rheometer Type A-100 2.64 mmorifice, 276 kPa, 25 C, 20 g)5.1.7 Hot Viscosity, MPa(See previous method, 2.64 mm orifice,276 kPa, 70 C, 20 g)5.1.8 Viscosity Stability(Samples aged 100 h at 70 C andconditioned at 23 +/- 2 C)5.1.9 Storage Stability
