1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 01 08 N-STATUS No replacement named J. Crist, NA 1989 05 02 B/031523 TP Revised clause 3.5.5 and page 6 P. Kuntze 1988 06 15 SM/EQ4331 TP Released P. Kuntze WP 3948-a Page 1 of 5 POLYETHYLENE TEREPHTHALAT
2、E (PET) 55 % GLASS WSK-M4D597-A FIBRE REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 55 % glass fibre rein- forced thermoplastic polyester molding compound with a high rigidity based on polyethylene terephthalate (PET). 2. APPLICATI
3、ON This specification was released originally for material used for adjuster bolts. 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 approv
4、al. Appropriate 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 supp
5、lied to this specification. The IR spectra and thermogram 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 test
6、ed under the same 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 otherwis
7、e specified. 3.4 MOLDING COMPOUND 3.4.1 Filler Content 53 - 57 % (ISO 3451/2, at 750 +/- 50 C, test portion 2.5 - 3.0 g) ENGINEERING MATERIAL SPECIFICATION WSK-M4D597-A WP 3948-b Page 2 of 5 3.4.2 Melt Flow Rate (MFR) 5-11 g/10 minutes (ISO 1133/ASTM D 1238, 280 +/- 0.5 C, 5 kg) The melt flow rate (
8、MFR) shall be tested immediately after drying the material at 130 - 135 C for 4 h minimum in a mechanical convection oven. 3.5 MOLDED TEST 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 foll
9、owing dimensions are required: A. 150 x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter 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 D
10、ensity 1.78 - 1.82 g/cm3 (ISO R 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max. Load, min 170 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, test speed, 5 mm/minute) 3.5.4 Flexural Modulus, min 17.5 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0
11、+/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 2.28 - 3.81 GPa (Method B/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.) Additionally, a Shear Modulus
12、 vs. Temperature curve shall be plotted for -50 to + 240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. 3.5.6 Impact Strength, Izod (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each te
13、st) 3.5.6.1 At 23 +/- 2 C, min 8.5 kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSK-M4D597-A WP 3948-b Page 3 of 5 3.5.6.2 At - 40 +/- 1 C, min 8.5 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be do
14、ne within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 230 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at 1.82 MPa) 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 170 +/- 2 C) 3.5.8.1 Tensile Strength
15、Change +/- 25 % (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25 % (Test Method per para 3.5.6.1 at 23 C, specimens to be notched before heat ageing.) 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
16、 +/- 0.1 mm with a smooth surface. 3.7 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be c
17、learly designated on the Engineering drawing. 3.8 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 properties, composition, construction, color
18、, processing or labelling 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 Materials Engineering activity of the proposed ch
19、anges 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D597-A WP 3948-b Page 4 of 5 Substance restrictions imposed by law, regulations or Ford, a
20、pply 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 engineering document for the application. 4. APPROVAL OF MATERIALS Materials defined by this specificat
21、ion 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, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected
22、 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 approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL
23、INFORMATION The information below is provided for clarification and assistance in meeting the requirement(s) to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 1.5E-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Mold
24、ing Shrinkage . After 48 h at 23 +/- 2 C 0.15 - 0.25 % 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.03 % . After 30 minutes at 120 C 0.03 % 5.3 MELTING POINT 255 C (ISO 1218, Method B/ASTM D 789) 5.4 MELT VOLUME RATE (MVR) 3.0 - 7.0 cm3/ (ISO 1133/ASTM D 1238, except 280 +/- 0.5 C, 10 minutes 5 kg load, extrudate volume in cm3/10 minutes) The melt volume rate (MVR) shall be tested immediatley after drying the material at 130 - 135 C for 4 h minimum in a mechanical covection oven. ENGINEERING MATERIAL SPECIFICATION WSK-M4D597-A WP 3948-b Page 5 of 5
