1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1992 04 01 EP00E10176266000 Released K. GerhardsWP 3948-a Page 1 of 7 POLYAMIDE (PA) 66, HEAT STABILIZED MOLDING WSK-M4D648-A3COMPOUND, EXTERIOR1. SCOPEThe material defined by this specification is a heat stabili
2、zed polyamide66 molding compound with added UV stabilization for exterior use.2. APPLICATIONThis specification was released originally for material used for functionalexterior parts.NOTICE: This material absorbs and retains moisture. Part design andtolerances must accommodate changes in part dimensi
3、ons and physicalproperties due to moisture absorption or loss in the service/assemblyenvironment.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/sour
4、ce 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 infrared and/orthermal analysis of material/parts
5、supplied to this specification.The IR spectra and thermogram 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 that correspond to the reference standard when test
6、edunder 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).All test materials immediately after processing have to be sealed incontainers
7、 that are impermeable to water vapor. If the moisturecontent exceeds 0.2 %, condition the material for a minimum of 16 hat 40 - 50 EC at a reduced pressure below 133 Pa.NOT TO BE USED FOR NEW DESIGN2015 N Status No replacement named D. Stark, NAENGINEERING MATERIAL SPECIFICATIONWSK-M4D648-A3WP 3948-
8、b Page 2 of 7 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 Melt Temperature 250 - 265 EC(ISO 1218, Method B/ASTM D 789 orDSC ASTM E 7
9、94)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 specimens.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 men
10、s 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 allowed.3.5.2 Density 1.12 - 1.16 g/cm(ISO 1183, Method A/ASTM D 792, Method A1)3.5.3 Tensile Strength at Yield, min 70 MPa(ISO R 527/ASTM
11、 D 638M, 150 x 10 x 4.0 +/-0.2 mm specimen, 50 mm/minute test speed)3.5.3.1 Elongation at Yield, min 2 %(Test Method per para 3.5.3)3.5.4 Flexural Modulus, min 2.5 GPa(ISO 178/ASTM D 790M, Method I, ProcedureA, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2mm/minute test speed, 64 mm support span,the radius o
12、f the loading nose 5.0 +/-0.1 mm and of the supports 2.0 +/- 0.2 mm)3.5.5. Shear Modulus at 23 EC 0.85 - 1.28 GPa(ASTM D 4065, forced constant amplitude,fixed frequency of 1 Hz +/- 15 %, strainlevel below 1 %. Specimen approx. 60 x 10x 4.0 +/- 0.2 mm cut from the center ofspecimen A. Specimen length
13、 between clamps35-40 mm. Soak time at each temperatureinterval - 3 minutes minimum)Additionally, a Shear M odulus vs. Temperature curve shall beplott ed for - 50 to + 240 EC temperature range, at 5 ECminimum intervals. The plotted curve must be withintolerance range shown on page 7.ENGINEERING MATER
14、IAL SPECIFICATIONWSK-M4D648-A3WP 3948-b Page 3 of 7 3.5.6 Impact Strength, Izod, min(ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test)3.5.6.1 At 23 +/- 2 EC 3.0 kJ/m3.5.6.2 At - 40 +/- 2 EC 2.5 kJ/mThe test specimens mu st be conditioned for minimu
15、mof 6 h at the above s 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, atstandard deflection
16、 of 0.32 +/- 0.01 mm)3.5.7.1 At 1.80 MPa 60 EC3.5.7.2 At 0.45 MPa 210 EC3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 15 0 +/- 50 air changes/h, 1000 h at 140+/- 2 EC. After heat aging test specimens are to becon ditioned in a desiccator for 3 - 5 h at 23 +/- 2 EC.Unaged property values shall be
17、determined at th e time of theaged properties determination)3.5.8.1 Tensile Strength at Max Load,Change +/- 25 %(Test Method per para 3.5.3)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 FO
18、GGING(FLTM BO 116-03)Fog Number, min 90Formation of excessive amounts of clear film or droplets is cause forrejection.3.8 WEATHERING RESISTANCEAfter exposure in accordance with 3.8.1, 3.8.2 a nd 3.8.3 the materialshall show no color cha nge in excess of specified Grey Scale rating(AATCC Evaluation P
19、rocedure 1/ISO 105-A02).In addition, there shall be no cracking, crazing or otherdeterioration.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D648-A3WP 3948-b Page 4 of 7 A slig ht loss of gloss or chalking will be allowed provided anaccep table appearance can be achieved by polishing with Ford carpolish (
20、auto wax) at permission of the affected Product DevelopmentMaterials Activity.All initial approvals w ill be based on the preliminary Weatherometerexposure, pending Florida exposure results for final approval.3.8.1 Xenon Arc Weatherometer Rating 4(SAE J1960, 1060 kJ/m2 exposure minimum,specimen size
21、: 150 x 100 mm minimum, 3.2+/- 0.2 mm thick, molded in smoothpolished mold)3.8.2 12 months Florida Rating 4(FLTM BI 160-01, 5 deg south, directweathering inland, specimen size: 150x 100 mm, minimum, 3.2 +/- 0.2 mm thick,molded in smooth polished mold)3.8.3 24 months Florida TBD(FLTM BI 160-01, 5 deg
22、 south, directweathering inland specimen size: 150x 100 mm, minimum, 3.2 +/- 0.2 mm thick,molded in smooth polished mold)3.9 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or perfo
23、rmance specifications. All critical areas with respect tothese properties shall be clearly designated on the Engineeringdrawing.3.10 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally grante
24、d.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 Supplier shall notify Purchasi
25、ng, 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 imposed by law, regulations or
26、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 SPECIFICATIONWSK-M4D648-A3WP 3948-b P
27、age 5 of 7 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, Design and Materials Engin
28、eering 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 compliance with all the requirements of this specifica
29、tion (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. U
30、ponapprov al, the material will be added to the Engineering Material ApprovedSource 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 7.5 - 8.5E-5/ EC(ASTM D 696)5.
31、2 MOLD SHRINKAGE(ISO 25 77, approx. 150 x 100 x 3.2 +/- 0.2 mm injection moldedspecimen)5.2.1 Molding Shrinkage. After 48 h at 23 +/- 2 EC 1.0 - 2.0 %5.2.2 Post Shrinkage(Separate specimens required for each test). After 48 h at 80 EC 0.1 - 0.3 %. After 30 minutes at 120 EC 0.2 - 0.5 %5.3 WATER ABSO
32、RPTION 1.2 - 1.5 %(ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mmdiameter, 3.2 +/- 0.2 mm thick specimen)5.4 IMPACT STRENGTH, IZOD, min(ISO 18 0, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mmspecimen, 10 specimens minimum)5.4.1 After Moisture Conditioning 10 kJ/mThe notched specimens shall be
33、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-M4D648-A3WP 3948-b Page 6 of 7 PA665.3 RECYCLING CODESAE or PA668OPTIONALENGINEERING MATERIAL SPECIFICATIONWSK-M4D648-A3WP 3948-b Page 7 of 7
