1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 16 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9, 4; Corrected numbering 5 1993 08 02 Released EP00E10258823000 Dr. B. Jenschke Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 5 STYRENE M
2、ALEIC ANHYDRIDE (SMA) COPOLYMER RUBBER WSK-M4D857-A MODIFIED, 15% GLASS FIBER REINFORCED MOLDING COMPOUND 1. SCOPE The material defined by this specification is a molding compound based on 15% glass fiber reinforced, rubber modified styrene maleic anhydride copolymer blend. The glass fibers are coat
3、ed with a non-PVA (polyvinyl acetate) binding agent. 2. APPLICATION This specification was released originally for material used for instrument panel carrier. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standar
4、d Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol(s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 3.0 - 6.0 g/ ISO 1133/ASTM D 1238, 220 C, 10 kg) 10 minutes The material
5、shall be dried for 2 h minimum at 80 85 C in a mechanical convection oven immediately preceding the test. 3.4.2 Glass Fiber Content 13 - 17% (ISO 3451/1, Method A, at 650 +/- 25 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all t
6、ests 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 center portion of the test specimen A and/o
7、r B. The specimens shall be prepared according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D857-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.13 - 1.19 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) (s) 3.5.3
8、 Tensile Strength at Max Load, min 48 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.5.4 Flexural Modulus, min 3.8 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius o
9、f the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 0.92 - 1.55 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 A. Specimen len
10、gth 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 +140 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact
11、 Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 7.0 kJ/m 3.5.6.2 At -40 +/- 2 C 6.5 kJ/mThe test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test
12、. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. (s) 3.5.7 Heat Deflection Temperature, min 115 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 3.5.8 Vicat S
13、oftening Temperature, min 115 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone 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,
14、 moisture-proof container filled with silica gel. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D857-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. Unaged property
15、 values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Change, +/- 15% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change, max -25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795)
16、Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.6 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 85 Formation of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information g
17、iven below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 4.5-5/ 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 Molding Shrinkage . After 48
18、h at 23 +/- 2 C 0.35 - 0.6% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.5% . After 30 min at 120 C 0.5% ENGINEERING MATERIAL SPECIFICATIONWSK-M4D857-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 5.3 MELT VOLUME
19、RATE 3.0 - 6.2 cm/ (ISO 1133/ASTM D 1238, 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 HEAT DEFLECTION TEMPERATURE, min 120 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard de
20、flection of 0.32 +/- 0.01 mm. 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 SMA-GF15 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D857-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
