1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2011 03 01 No replacement named A. Pan, APA N Status 1989 11 17 SM/EQ9859 TP Released L. Rodigas WP 3948-a Page 1 of 6 THERMOPLASTIC POLYESTER-ETHER ELASTOMER WSK-M4D694-A (TEEE), 63 DUROMETER D HARDNESS MOLDI
2、NG COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a rigid thermoplastic polyester-ether elastomer (TEEE), 63 durometer D hardness. The material is suitable for injection, extrusion, rotational moulding and melt cast moulding. 2. APPLICATION This specifi
3、cation was released originally for material used for damping bushes. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate
4、 statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this sp
5、ecification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the s
6、ame conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. E
7、NGINEERING MATERIAL SPECIFICATION WSK-M4D694-A WP 3948-b Page 2 of 6 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 7 - 11 g/ (ISO 1133/ASTM D 1238, 230 C, 2.16 kg) 10 minutes The material shall be dried for 1 h minimum at 135 C in a mechanical convection oven immediately preceding the test. 3.5 MOLDED T
8、EST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection 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 mm Specimens with sho
9、rter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.20 - 1.25 g/cm3 (ISO 1183, Method A/ASTM D 792,Method A1) 3.5.3 Hardness Durometer D 58 - 68 (ISO 868/ASTM D 2240, 15 s dw
10、ell) 3.5.4 Tensile Strength at Yield, min 18 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.4.1 Elongation at Yield, min 25 % (Test Method according to para 3.5.4) 3.5.5 Flexural Modulus, min 280 MPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10
11、x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.6 Shear Modulus at 23 C 90 - 140 MPa (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
12、 mm. Soak time at each temperature interval - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 150 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. ENGINEERING MATERIAL SPECIFICATION
13、WSK-M4D694-A WP 3948-b Page 3 of 6 3.5.7 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) 3.5.7.1 At 23 +/- 2 C No break 3.5.7.2 At - 40 +/- 2 C 15 kJ/m2 3.5.7.2 At - 20 +/- 2 C 20 kJ/m2 The test specimens must be co
14、nditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.8 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specim
15、en) 3.5.8.1 At 1.82 MPa 42 C 3.5.8.2 At 0.45 MPa 80 C 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 110 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Yield Change +/- 25 % (Tes
16、t Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod Change No break (Test Method per para 3.5.7.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surfa
17、ce. 3.7 FOGGING (FLTM BO 116-3) Fog Number, min tbd Formation of excessive amounts of clear film or droplets is cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSK-M4D694-A WP 3948-b Page 4 of 6 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be
18、 specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equi
19、valent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materi
20、als ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification ar
21、e to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engine
22、ering document for the application. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, D
23、esign and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon a
24、pproval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10E-5/ C (ASTM D 696) 5.2 MOLD
25、 SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1.2 - 1.7 % ENGINEERING MATERIAL SPECIFICATION WSK-M4D694-A WP 3948-b Page 5 of 6 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.1 - 0.3 % After 30 min at 120 C 0.2 - 0.5 % ENGINEERING MATERIAL SPECIFICATION WSK-M4D694-A WP 3948-b Page 6 of 6
