1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990 04 02 EP00E01031534000 Released M. SiewertWP 3948-a Page 1 of 6 POLYAMIDE (PA) 6, HEAT STABILIZED, 15 % GLASS WSK-M4D754-AFIBER REINFORCED MOLDING COMPOUND, EXTERIOR1. SCOPEThe material defined by this speci
2、fication is a heat stabilized, UVstabilized glass fiber reinforced polyamide 6 molding compound for exterioruse.2. APPLICATIONThis specification was released originally for material used for exteriorfunctional automotive applications.NOTICE: This material absorbs and retains moisture. Part design an
3、dtolerances must accommodate changes in part dimensions and physicalproperties due to moisture absorption or loss in the service/assemblyenvironment.3. REQUIREMENT3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Pla
4、n as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyze 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
5、 infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approval shallconstitute the reference standard and shall be kept on file at thedesignated material laboratory. All samples shall produce IR spectraand thermograms
6、 that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material and specimenswith moisture content not exceeding 0.2 % (test according to ISO 960,Method B/ASTM D 789).NOT TO BE USED FOR NEW DES
7、IGN2015 N Status No replacement named D. Stark, NAENGINEERING MATERIAL SPECIFICATIONWSK-M4D754-AWP 3948-b Page 2 of 6 All test materials imme diately after processing have to be sealed incon tainers that are impermeable to water vapor. If the moisturecontent exceeds 0.2 %, condition the material for
8、 a minimum of 16 hat 40 - 50 EC at a reduced pressure below 133 Pa.Conduct tests in a controlled atmosphere of 23 +/- 2 EC and 50 +/-5 % relative humidity. Individual specimens shall not be removedfrom closed containers until immediately before testing.3.4 MOLDING COMPOUND3.4.1 Glass Fiber Content 1
9、2.5 - 17.5 %(ISO 3451/4, test temperature600 +/- 25 EC, test portion 1 g)3.4.2 Melt Temperature 215 - 225 EC(ISO 1218, Method B/ASTM D 789)3.5 MOLDED TEST SPECIMEN3.5.1 Preparation of Test SpecimensUnless otherwise specif ied all tests shall be carried out oninjection molded one-end gated test speci
10、mens.The following dimensions are required:A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167)B. 120 x 10 x 4.0 +/- 0.2 mmSpeci mens with shorter dimensions shall be cut from thecenter portion of the test specimen A and/or B. The specimensshall be prepared according to ISO 294. No annea ling al
11、lowed.3.5.2 Density 1.20 - 1.28 g/cm 3(ISO 1183, Method A/ASTM D 792, Method A1)3.5.3 Tensile Strength at Max Load, min 90 MPa(ISO R 527/ASTM D 638M,150 x 10 x 4.0 +/- 0.2 mmspecimen, 5 mm/minute test speed)3.5.4 Flexural Modulus, min 4.0 GPa(ISO 178/ASTM D 790M, Method I,Procedure A, 80 x 10 x 4.0
12、+/- 0.2 mmspecimen, 64 mm support span)3.5.5. Shear Modulus at 23 EC 1.11 - 1.86 GPa(ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35-40 mm.
13、 Soak time at each temperature interval - 3 minutes minimum)ENGINEERING MATERIAL SPECIFICATIONWSK-M4D754-AWP 3948-b Page 3 of 6 Additionally, a Shear M odulus vs. Temperature curve shall beplott ed for - 50 to + 210 EC temperature range, at 5 ECminimum intervals. The plotted curve must be withintole
14、rance range shown on page 6.3.5.6 Impact Strength, Izod, min(ISO 180, Method A/ASTM D 256, Method A,63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test)3.5.6.1 At 23 +/- 2 EC 3 kJ/m 23.5.6.2 At - 40 +/- 2 EC 3 kJ/m 2The test specimens mu st be conditioned for minimumof 6 h at the above s
15、 pecified temperature prior toimpact test. Low temperature testing shall be donewithin the cold box, if not possible, test can beconducted outside, but within 5 s.3.5.7 Heat Deflection Temperature, min(ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen)3.5.7.1 At 1.82 MPa 180 EC3.5.7.2 At 0.45 MP
16、a 200 EC3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 150 +/- 50 airchanges/h, 1000 h at 140 +/- 2 EC.After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 EC. Unaged property values shall be determined at the time of the aged properties determination)3.5.8
17、.1 Impact Strength, Izod Change +/- 25 %(Test Method per para 3.5.6.1,specimens to be notched beforeheat aging)3.6 FLAMMABILITY(ISO 3795)Burn Rate, max 100 mm/minuteThe specimen size required for material approval is 355 x 100 x 1.0+/- 0.1 mm with a smooth surface.3.7 WEATHERING RESISTANCEAfter ex p
18、osure in accordance with 3.7.1, 3.7.2 and 3.7.3, themateria l shall show no color change in excess of specified AATCCrating (AATCC Gray Scale for Evaluating Change in Color, 10 step).ENGINEERING MATERIAL SPECIFICATIONWSK-M4D754-AWP 3948-b Page 4 of 6 In addition, there shall be no cracking, crazing
19、or otherdeterioration.A slig ht loss of gloss or chalking will be allowed provided anaccep table appearance can be achieved by polishing with Ford carpolish (auto wax) at permission of the affected Product DevelopmentMaterials Activity.3.7.1 Xenon Arc Weatherometer Rating 4(SAE J1960, 1060 kJ/m expo
20、sure 2minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold)3.7.2 12 months Florida Rating 4(FLTM BI 160-01, 5 E south,direct weathering inland, specimen size: 150 x 100 mm,minimum, 3.2 +/- 0.2 mm thick, moldedin smooth polished mold)3.7.3 24 months Flori
21、da tbd(FLTM BI 160-01, 5 E south,direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, moldedin smooth polished mold)3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g par
22、ts specificationand/or performance specifications. All critical areas with respectto these properties shall be clearly designated on the Engineeringdrawing.3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which ap
23、proval wasoriginally granted.Pri or to making any change in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Sup
24、plier 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 submitted with the request.Substance restrictions impo
25、sed 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 A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICAT
26、IONWSK-M4D754-AWP 3948-b Page 5 of 6 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 interest from theaffec ted Purchasing,
27、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 testspecim ens for Ford evaluation. Upon ap
28、proval, 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 to the specification.5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 3 - 6E-5/ EC(ASTM D 696)5.2 MOLD SHR
29、INKAGE(ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mminjection molded specimen)5.2.1 Molding Shrinkage! After 48 h at 23 +/- 2 EC 0.3 - 1.2 %5.2.2 Post Shrinkage(Separate specimens required for each test)! After 48 h at 80 EC 0.01 - 0.12 %! After 30 minutes at 120 EC 0.01 - 0.14 %5.3 WATER ABSORPTION
30、1.2 - 1.7 %(ISO 62, 24 h/ASTM D 570, 24 h,50 +/- 1 mm diameter, 3.2 +/- 0.2 mmthick specimen)5.4 IMPACT STRENGTH, IZOD, min(ISO 180, Method A/ASTM D 256, Method A,63.5 x 10 x 4.0 +/- 0.2 mm specimen,10 specimens minimum)5.4.1 After Moisture Conditioning 16 kJ/m 2The notched specimens shall be immersed for 48 h in distilledwater at 50 +/- 1 EC and subsequently conditioned for 1 h at23 +/- 2 EC and 50 +/- 5 % relative humidity prior to testand tested under the same conditions within 1 h.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D754-AWP 3948-b Page 6 of 6
