1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2009 08 11 N-STATUS Replaced by WSK-M4D792-A2 A. Pan, AP 1989-11-17 SM/EQ9859 TP Released P. Kuntze WP 3948-a Page 1 of 6 ABS MOLDING COMPOUND, VERY HIGH HEAT RESISTANT WSK-M4D710-A AND HIGH TENSILE STRENGTH N
2、OT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high tensile strength and very high heat resistant molding compound based on acrylonitrile butadiene styrene. 2. APPLICATION This specification was released originally for material used for non-visible and painted
3、parts such as wheel covers. 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 statistical tools must be used to analyz
4、e 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 specification. The IR spectra and thermogra
5、ms 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 same conditions. 3.3 CONDITIONING AND TEST
6、 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 96 h prior to testing and tested under the same conditions unless otherwise specified. 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate
7、2.8 - 6 g/ (ISO 1133/ASTM D 1238, 230 C, 10 kg) 10 minutes The material shall be dried for min of 2 h at 80 - 85 C in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATION WSK-M4D710-A WP 3948-a Page 2 of 6 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test
8、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 shorter dimensions shall be cut from the c
9、enter 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 1.04 - 1.08 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 60 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm speci
10、men, 50 mm/min) 3.5.3.1 Elongation at tbe, min tbe % (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 2.75 GPa (ISO 178/ASTM D 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 930 - 1390 MPa (ASTM D 4065, forced constant
11、 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 mm soak time at each temperature interval: 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve sh
12、all be plotted for - 50 to + 120 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, 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 +/
13、- 2 C 15 kJ/m2 3.5.6.2 At -10 +/- 2 C 7 kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSK-M4D710-A WP 3948-a Page 3 of 6 3.5.6.3 At - 40 +/- 2 C 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
14、 within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 89 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 1.82 MPa) 3.5.8 Vicat Softening Temperature, min 112 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - sil
15、icone oil, temp. raise 50 +/- 5 C/h. Dial gage reset to 0 after addition of 5 kg weight. At 49.0 N load) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188/
16、ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Max Load Change +/- 15 % (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change, max - 35 % (Test Method per
17、 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 1.9 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 95 Formation of excessive amounts of c
18、lear film or droplets is cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSK-M4D710-A WP 3948-a Page 4 of 6 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performan
19、ce 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 originally grante
20、d. 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 materials ability to meet the specification requirements, the Supplier shall notify Purchasin
21、g, 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 are to be submitted with the request. Substance restrictions imposed by law, regulations
22、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 engineering document for the application. 4. APPROVAL OF MATERIALS Materials defined by this
23、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, Design and Materials Engineering activity. Upon request, the Supplier shall submit to th
24、e 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 approval, the material will be added to the Engineering Material Approved Source List. 5
25、. 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 7.5E-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.
26、2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.4 - 0.7 % ENGINEERING MATERIAL SPECIFICATION WSK-M4D710-A WP 3948-a Page 5 of 6 5.2.2 Post Shrinkage . After 48 h at 80 C 0.1 - 0.2 % 5.3 MELT VOLUME RATE 3 - 6.5 cm3/ (ISO 1133/ASTM D 1238, 220 C, 10 kg) 10 minutes The material shall be dried for m
27、in of 2 h at 80 - 85 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, min 103 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/-0.2 mm specimen. At 0.45 MPa) All specimens dry as molded. If not tested immediately after molding specimens must be stored in a sealed moisture-proof container filled with silica gel. ENGINEERING MATERIAL SPECIFICATION WSK-M4D710-A WP 3948-a Page 6 of 6
