1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 12 N-STATUS No replacement named J. Crist, NA 2005 12 14 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1995 01 31 Activated S. DeGroodPrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 5
2、 STYRENE/MALEIC ANHYDRIDE (SMA) COPOLYMER MOLDING COMPOUND WSF-M4D728-A2 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound based on a styrene/maleic anhydride copolymer. 2. APPLICATION This specification was released originally for material used
3、for passenger compartment module housings. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified b
4、y symbol (s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 1.0 - 2.0 g/10 minutes (ISO 1133, 220 C, 10 kg) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded o
5、ne-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 shall be prepared according
6、to ISO 294. No annealing allowed. 3.5.2 Density 1.06 - 1.10 g/cm3(ISO 1183, Method A) ENGINEERING MATERIAL SPECIFICATIONWSF-M4D728-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 (s) 3.5.3 Tensile Strength at Yield, min 38 MPa (ISO R 527, 150 minimum x 10
7、 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.3.1 Elongation at Break, min 4% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.9 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 740 - 1300 MPa (ASTM D
8、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, a Shear Modulus ve
9、rsus 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. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/-
10、2 C 14 kJ/m23.5.6.2 At -40 +/- 1 C 5 kJ/m23.5.6.3 At -30 +/- 1 C 7.5 kJ/m2The 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. (s) 3.5.7 Heat Deflection Temperature, min 97 C (ISO
11、 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise 0.32 +/- 0.1 mm deflection. At 1.80 MPa) ENGINEERING MATERIAL SPECIFICATIONWSF-M4D728-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 (s) 3.5.8 Vicat Softening Temperature, min 117 C (ISO 306, 10 x 10 x 4.
12、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, specimens must be stored in a sealed, moisture-proof container filled with silica gel.
13、3.5.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile
14、 Strength at Yield Change +/- 25% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 30% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 90 Formation of clear film, dro
15、plets or crystals is cause for rejection. 3.7 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. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in
16、meeting the requirements of this specification. ENGINEERING MATERIAL SPECIFICATIONWSF-M4D728-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM E 831 (TMA), temperature range -30 to +30 C) . Parrallel to Flow
17、 7.7-5/ C . Perpendicular to Flow 7.8-5/ C 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 0.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.07% 5.3 HEAT DEFLECTION TEMPERATURE, min 115 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.1 mm deflection. At 0.45 MPa) 5.4 RECYCLING CODE SMA ENGINEERING MATERIAL SPECIFICATIONWSF-M4D728-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
