1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1989-11-17 SM/EQ9859 TP Released M. SiewertWP 3948-a Page 1 of 6 POLYAMIDE (PA) 66, IMPACT MODIFIED, HEAT WSK-M4D703-ASTABILIZED, 33 % GLASS FIBER REINFORCEDMOLDING COMPOUND1. SCOPEThe material defined by this sp
2、ecification is an impact modified glassfiber reinforced, heat stabilized polyamide 66 molding compound.2. APPLICATIONThis specification was released originally for material used for thehousing transmission control selector.NOTICE: This material absorbs and retains moisture. Part design andtolerances
3、 must accommodate changes in part dimensions 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 descr
4、ibedtherein 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 infrared
5、and/orthermal analysis of material/parts 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 corre
6、spond 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 DESIGN2014 08
7、18 N Status Replaced by WSS-M4D703-B1 / B2 R. Harris, NAENGINEERING MATERIAL SPECIFICATIONWSK-M4D703-AWP 3948-b Page 2 of 6 All test materials imme diately after processing have to be sealed incontain ers that are impermeable to water vapor. If the moisturecontent exceeds 0.2 %, condition the materi
8、al for a minimum of 16 hat 40 - 50 C at a reduced pressure below 133 Pa.Conduct tests in a cont rolled atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity. I ndividual specimens shall not be removed fromclosed containers until immediately before testing.3.4 MOLDING COMPOUND3.4.1 Glass Fiber Con
9、tent 30.5 - 35.5 %(ISO 3451/4, test temperature 600 +/-25 C, test portion 1 g)3.4.2 Melt Temperature 250 - 265 C(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 s
10、pecimens.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 lin
11、g allowed.3.5.2 Density 1.29 - 1.37 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1)3.5.3 Tensile Strength at Max Load, min 125 MPa(ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/-0.2 mm specimen, 5 mm/minute test speed)3.5.4 Flexural Modulus, min 5.9 GPa(ISO 178/ASTM D 790M, Method I,Procedure A, 80 x 10 x
12、 4.0 +/- 0.2 mmspecimen, 64 mm support span)3.5.5. Shear Modulus at 23 C 1.14 - 1.90 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 between clamps35-40 mm.
13、Soak time at each temperatureinterval - 3 minutes minimum)ENGINEERING MATERIAL SPECIFICATIONWSK-M4D703-AWP 3948-b Page 3 of 6 Additionally, a Shear M odulus vs. Temperature curve shall beplotted for - 50 to + 240 C temperature range, a t 5 C minimumintervals. The plotted curve must be within toleran
14、ce rangeshown 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 C 18 kJ/m23.5.6.2 At - 40 +/- 2 C 10 kJ/m2The test specimens mu st be conditioned for minimumof 6 h at the above s pecif
15、ied 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 230 C3.5.7.2 At 0.45 MPa 245 C
16、3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 15 0 +/- 50 air changes/h, 1000 h at 150+/- 2 C. After heat aging test specimens are to becondition ed in a desiccator for 3 - 5 h at 23 +/- 2 C.Unaged property values shall be determined at th e time of theaged properties determination)3.5.8.1 Impact
17、 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 FOGGING(FLTM BO 116-03)Fog Number, min T
18、BDFormation of excessive amounts of clear film or droplets is cause forrejection.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D703-AWP 3948-b Page 4 of 6 3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g par
19、ts specificationand/or performance specifications. All critical areas with respect tothese 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
20、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
21、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
22、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.4. APPROVAL OF MATERIALSMat eri
23、als 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 Engineering activity. Uponrequest, the Supplier
24、 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 approval, the material will be addedto the Engineering Material Approv
25、ed 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 1.7 - 2.3E-5/ C(ASTM D 696)5.2 MOLD SHRINKAGE(ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mminjection mold
26、ed specimen)5.2.1 Molding Shrinkage! After 48 h at 23 +/- 2 C 0.2 - 1.0 %ENGINEERING MATERIAL SPECIFICATIONWSK-M4D703-AWP 3948-b Page 5 of 6 5.2.2 Post Shrinkage(Separate specimens required for each test)! After 48 h at 80 C 0.01 - 0.05 %! After 30 minutes at 120 C 0.01 - 0.08 %5.3 WATER ABSORPTION
27、0.5 - 0.7 %(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 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mmspecimen, 10 specimens minimum)5.4.1 After Moisture Conditioning 25 kJ/m2The notched specimens shall be immersed for 48 h in distilledwater at 50 +/- 1 C and subsequently conditioned for 1 h at23 +/- 2 C and 50 +/- 5 % relative humidity prio r to test andtested under the same conditions within 1 h.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D703-AWP 3948-b Page 6 of 6
