1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes Ver. 2 2008 07 29 N-STATUS Replaced by WSK-M4D827-A C. Boese, FNA 1998 03 04 Activated M. Masserant WP 3948-a Page 1 of 6 ABS MOLDING COMPOUND, HIGH COLD IMPACT WSS-M4D631-A2 INTERIOR NOT TO BE USED FOR NEW DE
2、SIGN 1. SCOPE The material defined by this specification is a natural ABS resin designed for use in molded-in-color, low gloss interior applications requiring ductile impact performance at ambient and low temperatures and enhanced chemical resistance. 2. APPLICATION This material specification is pr
3、imarily for interior energy management components, i.e., glove box doors, knee bolsters, etc. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qua
4、lification of materials. A Control Plan for ongoing production verification is required. This plan must be reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to
5、 analyze process/product data and assure consistent processing of the materials. Part producers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.2 INFRARED SPECT
6、ROPHOTOMETRY 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 approval shall constitute the reference standard and shall be kept on file at
7、the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSS-M4D631-A2 WP 3948-b Page 2 of 6 3.3 CONDITIONING AND TEST CONDITIONS All test values indica
8、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. All testing shall be done on unannealed samples. 3.4 MOLDING COMPOUND 3.4.1
9、Melt Flow Rate 2.4 - 4.5 g/ (ISO 1133, 220 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. 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried o
10、ut 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 center portion of the test specimen A and/or B. The specimens shal
11、l be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.02 - 1.08 (ISO 1183, Method A) g/cm3 3.5.3 Tensile Strength at Max Load, min 33 MPa (ISO R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute, 10 specimens for each test) 3.5.4 Flexural Modulus, min 1.8 GPa (ISO 178, Me
12、thod I, Procedure A, 150 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 540 - 750 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approximately 60 x 100 x 4.0 +/- 0.2 mm cut from the center of specimen A
13、.) ENGINEERING MATERIAL SPECIFICATION WSS-M4D631-A2 WP 3948-b Page 3 of 6 Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 110 C temperature range, at 5 C min intervals. The plotted curve must be within tolerance range shown on page 7. 3.5.6 Impact Strength, Izod, m
14、in (ISO 180, 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 34 kJ/m2 3.5.6.2 At - 10 +/- 2 C 25 kJ/m2 3.5.6.3 At - 40 +/- 2 C 20 kJ/m2 The test specimens must be conditioned for min of 6 h at the above specified temperature prior to impact test. Low
15、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 (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 75 C 3.5.7.2 At 0.45 MPa 90 C All specimens dry as molded. If not tested imme
16、diately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.8 Vicat Softening Temperature, min 93 C (ISO 306, 120 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to “0” after addition of 5 kg
17、weight. At 50 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, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of th
18、e aged properties determination) 3.5.9.1 Tensile Strength at Max Load +/- 25 % Change (Test Method per para 3.5.3) ENGINEERING MATERIAL SPECIFICATION WSS-M4D631-A2 WP 3948-b Page 4 of 6 3.5.9.2 Impact Strength, Izod Change +/- 25 % (Test Method per para 3.5.6.1, specimens to be notched before heat a
19、ging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.0 +/- 0.1 mm with a smooth surface. 3.7 SPECIAL REQUIREMENTS 3.7.1 Weathering Resistance After exposure in accordance with para 3.7.1.1 and 3.7.1.2 the material shall show
20、 no fading or color change in excess of specified AATCC rating (AATCC Gray Scale for Evaluating Change in Color, 10 step). In addition, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by
21、washing with mild detergents and water (ratio 5:95 by volume). 3.7.1.1 Xenon Arc Weatherometer Rating 4 (SAE J 1885, except Black Panel Temperature at 80 C, 300 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.1.2 12 months Florida Rating
22、 4 (FLTM BI 160-01, 5 deg south, under glass, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification
23、 and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. ENGINEERING MATERIAL SPECIFICATION WSS-M4D631-A2 WP 3948-b Page 5 of 6 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equi
24、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
25、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
26、e to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The regulations are defined in Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must
27、 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 Materia
28、ls Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not nominal values), the material designation and code num
29、ber, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this 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
30、Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8 - 13E-5/ C (ISO 11359-2) Temperature Range - 30 to 30 C 5.2 MOLD SHRINKAGE (ISO 2577, approxima
31、tely 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.7 - 1.0 % ENGINEERING MATERIAL SPECIFICATION WSS-M4D631-A2 WP 3948-b Page 6 of 6 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1 % 5.3 MELT VOLUME RATE 2.7 - 4.5 cm3/ (ISO 1133, 220 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. 5.4 RECYCLING CODE ABS
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