1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes Rev 03 2011 06 23 N Status No replacement named A. Pan, APA 1998 01 08 Revised Revised para 3.5.8; Updated L. Rodigas 1990 05 02 EP00E01031535000 Released P. Kuntze WP 3948-a Page 1 of 7 ABS MOLDING COMPOUND,
2、HIGH HEAT RESISTANCE WSK-M4D745-A2 HIGH IMPACT STRENGTH, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molded in color high impact strength, high heat resistant molding compound based on acrylo- nitrile-butadiene-styrene (ABS) that has been UV stabil
3、ized for unpainted exterior applications. 2. APPLICATION This specification was released originally for material used for visible exterior body parts. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material
4、specification requirements are to be used for initial qualification 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
5、submission. Appropriate statistical tools must be used to 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 a
6、nd/or the relevant Materials Activity. 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of
7、 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 the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the referen
8、ce standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSK-M4D745-A2 WP 3948-b Page 2 of 7 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
9、for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 8 - 13 g/ (ISO 1133, 220 C, 10 kg) 10 minutes The material shall be dried for 2 h min at 80 - 85 C in a mechanical convection oven immediately preced
10、ing the test. 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 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 +/-
11、 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 Density 1.05 - 1.10 g/cm3 (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 50 MPa (ISO R 5
12、27, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute) 3.5.3.1 Elongation at Break, min 8 % (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 2.5 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 0.85 - 1.2 GPa (ASTM D 4065, force
13、d constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approximately 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 min) ENGINEERING MATERIAL SPECIFICATION WSK
14、-M4D745-A2 WP 3948-b Page 3 of 7 Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 120 C temperature range, at 5 C min intervals. The plotted curve must be within tolerance range shown on page 7. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2
15、 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 17 kJ/m2 3.5.6.2 At - 40 +/- 2 C 5 kJ/m2 3.5.6.3 At - 10 +/- 2 C 8.5 kJ/m2 The test specimens must be conditioned for min of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the c
16、old box. (s) 3.5.7 Heat Deflection Temperature, min 80 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with s
17、ilica gel. (s) 3.5.8 Vicat Softening Temperature, min 100 C (ISO 306, 10 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 weight. At 50 N load) All specimens dry as molded. If not tested immediately after molding, speci
18、mens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188, except 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
19、 +/- 15 % Load Change (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change, - 25 % max (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSK-M4D745-A2 WP 3948-b Page 4 of 7 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minut
20、e The specimen size required for material approval is 355 x 100 x 1.9 +/- 0.1 mm with a smooth surface. 3.7 WEATHERING RESISTANCE After exposure in accordance with para 3.7.1, 3.7.2, and 3.7.3, the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation Procedu
21、re 1/ISO 105-A02). 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 washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of th
22、e affected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.7.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 660 kJ/m2 exposure min, specimen size: 150 x 100 mm mi
23、n, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.2 12 months Florida Rating 4 24 months Arizona (NAAO only) (SAE J1976, 5 deg south, direct weathering inland, specimen size: 150 x 100 mm, min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.3 24 months Florida Rating 3 - 4 24 m
24、onths Arizona (NAAO only) (SAE J1976, 5 deg south, direct weathering inland, specimen size: 150 x 100 mm, min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) ENGINEERING MATERIAL SPECIFICATION WSK-M4D745-A2 WP 3948-b Page 5 of 7 3.8 RESISTANCE TO WHITENING Rating 4 (EAO applications only) (SA
25、E J1960, 660 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, grained on one side, reverse ungrained, follow with immersion for 5 minutes at 85 +/- 2 C in water and soap* (ratio 95:5 by volume) The material shall show no color change in excess of specified Gray Scale rating
26、 (AATCC Evaluation Procedure 1/ISO 150-A02) after 5 minutes and 24 h waiting time after removal from the water and soap solution. *Soap according to Ford stock code number 800.51211 or equivalent. 3.9 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be speci
27、fied on the Engineering drawing, Engineering parts specification and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.10 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent
28、 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 materials ab
29、ility 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 are to b
30、e 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D745-A2 WP 3948-b Page 6 of 7 4. A
31、PPROVAL 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, Design and Materials Engineering activity
32、. 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 representative of the test facility, demonstrating full compliance with all the requirements of this specification (test re
33、sults, 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 this specification and on an assessment of suitability for intended processes and/or applications. Upon approval,
34、 the material will be added to the Engineering Material Approved 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 7 - 10E-5/ C (ASTM E 831 TMA, te
35、mperature range - 20 to + 40 C) 5.2 MOLD SHRINKAGE (ISO 2577, approximately 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.4 - 0.8 % 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1 - 0.2 % 5.3 MELT
36、VOLUME RATE 8.5 - 14.0 cm3/ (ISO 1133, 220 C, 10 kg) 10 minutes The material shall be dried for 2 h min at 80 - 85 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, min 93 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm defle
37、ction. 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. 5.5 RECYCLING CODE ABS ENGINEERING MATERIAL SPECIFICATION WSK-M4D745-A2 WP 3948-b Page 7 of 7 THE GRAPHIC WHICH SHOULD APPEAR AT THIS POSITION OF THE SPECIFICATION CAN BE OBTAINED BY REFERENCING THIS SPECIFICATION NUMBER FROM: ENGINEERING MATERIALS & STANDARDS ENVIRONMENTAL AND SAFETY ENGINEERING FORD MOTOR COMPANY SUITE 700 C, FAIRLANE PLAZA SOUTH DEARBORN, MICHIGAN 48126 PHONE (313) 845-8295
