1、WP 3948-aPage 1 of 3ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberHEAT SHIELD, FIBER MAT, ALUMINUM PLATED WSK-M8G241-ASTEEL SHEETS1. SCOPEThe mat erial defined by this specification is a non-woven fiber matconsist ing of aramide and mineral fibers, silica containing fillers bon
2、dedwith si licone rubber. This mat is covered by two aluminum plated steelsheet s. These three components will be deep drawn and crimped on outsidearea.2. APPLICATIONThis specification was released originally for heat shields.Internal Component Temperature, max 320 CSurface Temperature, max 400 C3.
3、REQUIREMENTS3.1 STATISTICAL PROCESSSup pliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedthe rein is required for material/source approval. Appropriatestatistical tools must be used to analyze process /product data so thatvar
4、iation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct in frared and/or thermalanaly sis of material/parts supplied to this specification. The IRspe ctra and thermograms established for initial approval
5、 shallconsti tute the reference standard and shall be kept on file at thedesignated material labo ratory. All samples shall produce IR spectraand thermograms that cor respond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONS OF FIBER MATAll tests sha
6、ll be conducted in accordance with ASTM F 104 type 7materi al unless otherwise specified. The requirements of thisspecification are valid for mat material of 0.5 to 2.0 mm thickness.Date Release No. Released1993 09 01 EP00E10258825000 Revised K. Gerhards1992 01 06 EP00E10176259000 Released K. Gerhar
7、dsENGINEERING MATERIAL SPECIFICATIONWSK-M8G241-AWP 3948-aPage 2 of 3Prior to testing, the mat erial shall be conditioned for at least 4 hat 2 3 +/- 2 C in a closed chamber containing anhydrous calciumchloride as a dessicant. The air in the chamber shall be circulatedby gentle mechanical agit ation.
8、Specimens shall then be transferredimm ediately to a controlled humidity room and conditioned for atleast 20 h at 23 +/- 2 C and 50 +/- 5 % relative humidity.3.4 ORIGINAL PROPERTIES OF FIBER MAT3.4.1 Ash Content 14 %(ASTM F 495, 600 C)3.4.2 Tensile Strength, min 1 MPa(ASTM F 152, Method A)3.4.3 Comp
9、ressibility 35 - 55 %(ASTM F 36, Procedure K)3.4.4 Recovery, min 20 %(ASTM F 36, Procedure K)3.5 HEAT AGING OF FIBER MAT(ISO 188/ASTM D 573, 150 +/- 50 air changes/h,22 h at 250 +/- 2 C)3.5.1 Tensile Strength Change, max - 5 %(ASTM F 152, Method A)3.5.2 Compressibility 25 - 50(ASTM F 36, Procedure K
10、)3.5.3 Recovery, min 15 %(ASTM F 36, Procedure K)3.5.4 Weight Change, max - 5 %3.6 ALUMINUM PLATED STEEL SHEETSCold rolled low carbon sheet steel (WSB-M1A250-B1) aluminum coated onboth sides 3.7 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufact ured parts shall bespecified on
11、 the Engineering drawing, Engineering parts specificationand/or performance specifications. All critical areas with respectto thes e properties shall be clearly designated on the engineeringdrawing.ENGINEERING MATERIAL SPECIFICATIONWSK-M8G241-AWP 3948-a Page 3 of 33.8 SUPPLIERS RESPONSIBILITYAll mat
12、 erials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any change in the properties, composition,cons truction, color, processing or labeling of the materialor iginally approved under this specificatio
13、n, whether or not suchchan ges affect the materials ability to meet the specificationrequ irements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obt ain the written approval of the Materials Engineeringactivity. Test data,
14、 tes t samples and a new code identification areto be submitted with the request.Substance restrictions im posed 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 MATERIALSMa
15、terials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppl iers desiring approval oftheir materials shall first obtain an expression of interest from theaffe cted Purchasing, Design and Materials Engineering activity. Uponrequest , the Supp
16、lier shall submit to the affected Materials Engineeringactivi ty a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the tes t facility, demonstratingfull compliance with all the requirements of this specification (testresults, not nominal values)
17、, the material designa tion and code number, andtest specimens for Ford evaluation. Fords engineering approval of amaterial will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.
