1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2013 04 03 N Status Replaced by WSB-M4D857-A2 L. Soreide, NA 2005 12 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 03 01 Released C/01031533 P. Kuntze Controlled document at www.MATS Copyright 2013, Ford Global Tech
2、nologies, LLC Page 1 of 5 STYRENE MALEIC ANHYDRIDE (SMA) COPOLYMER RUBBER WSK-M4D724-A1 MODIFIED, 20% GLASS FIBER REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound based on 20% glass fiber reinforced, rubber modified s
3、tyrene maleic anhydride copolymer. The glass fibers are coated 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 suppl
4、iers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 3.0 - 4.5 g/ (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 convect
5、ion oven immediately preceding the test. 3.4.2 Glass Fiber Content 18 - 22% (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 tests shall be carried out on injection molded one-end gated test
6、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 prepared according to ISO 294. No ann
7、ealing allowed. ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A1 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.19 - 1.23 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 62 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm speci
8、men, 5 mm/minute test speed) 3.5.4 Flexural Modulus, min 5.3 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 of 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 1.05
9、 - 1.74 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 length between clamps 35 - 40 mm soak time at each temperature interval: 3 minutes minimum). Additionally
10、, 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 Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 sp
11、ecimens for each test) 3.5.6.1 At 23 +/- 2 C 7 kJ/m2 3.5.6.2 At -40 +/- 2 C 7 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 out
12、side, but within 5 s. 3.5.7 Heat Deflection Temperature, min 118 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 Softening Temperature, min 120 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temp. ra
13、ise 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A1 Copyrigh
14、t 2013, Ford Global Technologies, LLC Page 3 of 5 3.5.9 Heat Ageing Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength Change, max +/- 15% (Test Method
15、 per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, specimens to be notched before heat ageing) 3.6 FLAMMABILITY (ISO 3795) 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
16、FOGGING (FLTM BO 116-03) Fog Number, min 95 Formation of excessive amounts of clear film or droplets is cause for rejection. 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 TH
17、ERMAL EXPANSION 3.6-5/ 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 h at 23 +/- 2 C 0.2 - 0.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1% . After 30 min at
18、 120 C 0.1% 5.3 MELT VOLUME RATE 2.0 - 3.5 cm3/ (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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A1 Copyright 2013, Ford Global Technol
19、ogies, LLC Page 4 of 5 5.4 HEAT DEFLECTION TEMPERATURE, min 125 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 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 SAE or SMA-GF20 OPTIONAL SMA-GF20 ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A1 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
