1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 01 12 N-STATUS No replacement named J. Crist, NA 1990 07 11 DE00E00107002060 Released J.B. Huebner WP 3948-a Page 1 of 6 POLYBUTYLENE TEREPHTHALATE (PBT), 30 % GLASS WSF-M4D737-A FIBER REINFORCED MOLDING
2、COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a glass fiber reinforced thermoplastic polyester molding compound based on polybutylene terephthalate. 2. APPLICATION This specification was released originally for material used for the DIS housing. 3. REQ
3、UIREMENTS 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 statistical tools must be used to analyze process/product data so that var
4、iation 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 specification. The IR spectra and thermograms established for initial approva
5、l 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 same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indica
6、ted 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. 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 5 - 15 g/ (ISO 1133/ASTM D 1238, 2
7、50 C, 2.16 kg) 10 minutes 3.4.2 Glass Fiber Content 28 - 32 % (ISO 3451/2, Method A, at 650 +/- 25 C) ENGINEERING MATERIAL SPECIFICATION WSF-M4D737-A WP 3948-a Page 2 of 6 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on inject
8、ion 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 shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepare
9、d according to ISO 294. No annealing allowed. 3.5.2 Density 1.45 - 1.55 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 94 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 6.8 GPa (ISO 178/ASTM D
10、 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.0 - 2.0 GPa (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
11、A. Specimen length between clamps 35-40 mm. Soak time at each temperature interval -3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 200 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page
12、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 8.5 kJ/m2 3.5.6.2 At - 40 +/- 2 C 5.5 kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSF-M4D737-A WP 3948-a Page 3 of 6 3.5.6.3 At - 20 +/- 2
13、C 6.5 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 done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 165 C (ISO
14、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, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength Change +/- 25 % (Te
15、st Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25 % (Test Method per para 3.5.6.1, 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
16、ce. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min TBD Formation of excessive amounts of clear film or droplets is cause for rejection. 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specificatio
17、n 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 equivalent in all characteristics to the material upon which approval was
18、 originally granted. ENGINEERING MATERIAL SPECIFICATION WSF-M4D737-A WP 3948-a Page 4 of 6 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 mater
19、ials 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 a
20、re 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 engin
21、eering 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,
22、Design 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
23、approval, 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 TBD (ASTM D 696) 5.2 MOLD SHR
24、INKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Mold Shrinkage (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) After 48 h at 23 +/- 2 C 0.2 % 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.004 % Aft
25、er 30 min at 120 C 0.004 % 5.3 MELT TEMPERATURE 215 C (ISO 1218/ASTM D 789) ENGINEERING MATERIAL SPECIFICATION WSF-M4D737-A WP 3948-a Page 5 of 6 5.4 HEAT DEFLECTION TEMPERATURE 205 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) ENGINEERING MATERIAL SPECIFICATION WSF-M4D737-A WP 3948-a Page 6 of 6
