1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Released 2010 01 07 N-STATUS No replacement named J. Crist, NA 1994 11 16 Revised and Retyped, was 9 pages 1985 10 05 SM/EQ 5549 TP Release WP 3948-a Page 1 of 5 POLYURETHANE, THERMOPLASTIC ELASTOMER, ESK-M4D498-
2、A 20 % GLASS FIBER, DUROMETER D 67 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic glass fiber reinforced polyester polyurethane elastomer molding compound. 2. APPLICATION This specification was originally released for material used for the jack f
3、laps on rocker molding. 3. REQUIREMENTS Note: The material shall be conditioned for a minimum of 24 h at 23 +/- 2 C and 50 +/- 5 % relative humidity prior to test and tested under the same conditions unless otherwise specified. 3.1 REQUIREMENTS FOR THE MOLDING COMPOUND 3.1.1 Glass Fiber Content 18 -
4、 22 % (ISO 3451/1, Method A, 30 minutes at 700 +/- 50 C, test portion 0.6 to 0.8 g) 3.2 REQUIREMENTS FOR INJECTION MOLDED TEST SPECIMENS Preparation of specimens according to ISO 294. The optimum molding and annealing conditions shall be as recommended by the supplier of the molding compound. 3.2.1
5、Density, Natural 1.37 +/- 0.03 g/cm3 (ISO R 1183, Method A) This range may be exceeded by pigmented material. 3.2.2 Hardness Durometer D 65 - 72 (ISO 868, samples plied up to a minimum thickness of 6mm; reading to be taken after 15 s) 3.2.3 Tensile Stress at Break, min 55 MPa (ISO R 527, Type 1, thi
6、ckness of test) ENGINEERING MATERIAL SPECIFICATION ESK-M4D498-A WP 3948-b Page 2 of 5 3.2.4 Elongation at Break, min 20 % Test method see para 3.2.3. 3.2.5 Shear Modulus (ISO 537, Method A, specimen size: 60 x 10 x 1 mm.) At 23 C 300 - 500 MPa Additionally a shear modulus curve shall be plotted from
7、 - 50 to + 140 C and shall be within the tolerance range shown on page 5. At least one measurement at 5 C intervals is necessary to establish the curve. Note: The test specimens must be injection molded in the above mentioned size with front end gating and shall not be cut from larger test specimens
8、. 3.2.6 Izod Impact Strength, Notched (ISO 180/4A, specimen size: 63.5 x 12.7 x 3.2 mm, type A notch, number of specimen: 10 for each test) The test specimens must be injection molded in the above mentioned size with front end gating and shall not be cut from larger test specimens. Maximal fin 0.1 m
9、m. At 23 C, min 35 kJ/m2 At - 10 C, min 12 kJ/m2 At - 40 C, min 6 kJ/m2 Note: The test specimens must be stored 6 - 8 h in the test box at specified test temperature +/- 1 C prior to impact test. Testing shall be done within the test box, if not possible, test can be conducted outside, but within 5
10、s. 3.2.7 Heat Deflection Temperature (ISO 75, specimen size: 127 x 12.7 x 3.2 mm) Method A: 1.80 MPa, min 95 C Method B: 0.45 MPa, min 125 C 3.3 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts suppli
11、ed to this specification. 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 teste
12、d under the same conditions. ENGINEERING MATERIAL SPECIFICATION ESK-M4D498-A WP 3948-b Page 3 of 5 3.4 SUBSTANCE CONTROL Legal, health, safety and environmental constraints may apply to the materials which are submitted for approval to this specification. Refer to Engineering Material Specification
13、SKM-99P999-A. 3.5 REQUIREMENTS FOR THE FINISHED PART As specified on Engineering Drawing. 3.6 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the
14、properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materi
15、als 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 are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addre
16、ssed by this document. The restrictions are defined in Engineering Materials Specification WSS-M99P9999-A1. 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 shal
17、l first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representat
18、ive of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to t
19、his specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION Note: These data are included for information only and are not a requirement. 5.1 COEFF
20、ICIENT OF LINEAR THERMAL EXPANSION 1.5 - 3.5 x 10E-5 1/C (ASTM D 696) ENGINEERING MATERIAL SPECIFICATION ESK-M4D498-A WP 3948-b Page 4 of 5 5.2 SHRINKAGE (ISO 2577, except injection molded specimen) 5.2.1 Molding Shrinkage 0.1 to 0.5 % After 48 h storage at room temperature. 5.2.2 Post Shrinkage Det
21、ermined on new specimens for each test. 5.2.2.1 After additional storage for 48 h at 80 C 0 - 0.05 % 5.2.2.2 After additional storage for 30 minutes at 120 C 0 - 0.05 % 5.3 WATER ABSORPTION 0.8 - 1.5 % (ISO 62, Method 1, except test result in percent. Test specimens dry as molded; specimen dia 50 +/- 1 mm, specimen thickness: 3.0 +/- 0.2 mm) 5.4 FLEXURAL MODULUS 1400 - 2200 MPa (ISO 178, tangent, specimen size: 80 x 10 x 4 mm) Sr -Factor 0.01 Bending span 60 mm. ENGINEERING MATERIAL SPECIFICATION ESK-M4D498-A WP 3948-b Page 5 of 5
