1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1991 03 01 EP00E01089482000 Revised C.L. Voss Conc. J.Schult1990 07 02 EP00E01031537000 D-MB/PQ-13 Released C.L. Voss Conc. J.SchultWP 3948-a Page 1 of 6 POLYAMIDE (PA) 11 FLEXIBLE, HEAT STABILIZED WSK-M4D700-AMO
2、LDING AND EXTRUSION COMPOUND1. SCOPEThe ma terial defined by this specification is a type 11 polyamide (nylon)molding compound.2. APPLICATIONThi s specification was released originally for material used for fuellines.NOTIC E: This material absorbs and retains moisture. Part design andtoleran ces mus
3、t accommodate changes in part dimensions and physicalpro perties due to moisture absorption or loss in the service/assemblyenvironment.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as descri
4、bedtherein 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 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared
5、and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and ther mogram established for initial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that c
6、orrespond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicat ed 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 imme diately
7、after processing have to be sealed incontain ers that are impermeable to water vapor. If the moisturecontent exceeds 0.2 %, condition the material for a minimum of 16 hat 40 - 50 C at a reduced pressure below 133 Pa.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D700-AWP 3948-b Page 2 of 6 Conduct tests in
8、 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 Melt Temperature, min 183 - 187 C(ISO 1218, Method B/ASTM D 789, orDSC - ASTM E 794)3.5 MOLDED TEST SPE
9、CIMEN3.5.1 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 mens with shorter dimensi
10、ons 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 1.04 - 1.06 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1)3.5.3 Tensile Strength at Yield 23 MPa(ISO R 527/ASTM D 638M, 150 min x 10 x 4.
11、0+/- 0.2 mm specimen, 50 mm/min test speed)3.5.3.1 Elongation at Yield, min 20 %(Test Method acc. to para 3.5.3)3.5.4 Flexural Modulus, min 320 MPa(ISO 178/ASTM D 790M, Method I, ProcedureA, 80 x 10 x 4.0 +/- 0.2 mm specimen,64 mm support span)3.5.5. Shear Modulus at 23 C 150 - 210 MPa(ASTM D 4065,
12、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. Soak time at each temperatureinterval - 3 minutes minimum)Additionally, a Shear M odulus vs. Temperatu
13、re curve shall beplotted for - 50 to + 150 C temperature range, a t 5 C minimumintervals. The plotted curve must be within tolerance rangeshown on page 6.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D700-AWP 3948-b Page 3 of 6 3.5.6 Impact Strength, Izod, min(ISO 180, Method A/ASTM D 256, Method A, 80 x
14、10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test)3.5.6.1 At 23 +/- 2 C No break3.5.6.2 At - 20 +/- 2 C 4 kJ/m23.5.6.3 At - 40 +/- 2 C 4 kJ/m2The test specimens mu st be conditioned for minimumof 6 h at the above s pecified temperature prior toimpact test. Low temperature testing shall be done
15、within 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 38 C3.5.7.2 At 0.45 MPa 105 C3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 15 0 +/- 50 air changes/h,
16、 1000 h at 130+/- 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 Tensile Strength Change +/- 25 %(Test Method per para 3.5.3)3.6 FLAMMABILITY(ISO
17、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 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specification
18、and/or performance specifications. All critical areas with respect tothese properties shall be clearly designated on the Engineeringdrawing.3.8 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasorigin
19、ally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D700-AWP 3948-b Page 4 of 6 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 abi
20、lity 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 samples and a new code identification areto be su
21、bmitted 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 A3) is specified on the engineeringdocument
22、 for the application.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 Mater
23、ials 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 compliance with all the requirements of this
24、 specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. In addition to meeting therequi rements of this specification, the materials will be assessed forsuita bility for intended applications as part of the approval process
25、Upo n approval, the material will be added to the Engineering MaterialApproved 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 10 - 15E-5/ C(ASTM D 696)5.
26、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 C 1.2 - 2.0 %5.2.2 Post Shrinkage(Separate specimens required for each test). After 48 h at 80 C 0.1 - 0.4 %. After 30 min. at 120 C 0.2 - 0.5 %ENGINEERING MATERIAL SPECIFICATIONWSK-M4D700-AWP 3948-b Page 5 of 6 5.3 WATER ABSORPTION, max 0.4 %(ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mmdiameter, 3.2 +/- 0.2 mm thick specimen)5.4 FOGGING(FLTM BO 116-03)Fog Number, min 15ENGINEERING MATERIAL SPECIFICATIONWSK-M4D700-AWP 3948-b Page 6 of 6
