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 2001 04 27 Revised Revised 1, 2 & Updated M. Masserant 1994 11 10 Released NB00I10043054389 M. Trapp Printed copies are uncontrolled Copyright 2006, Ford Global Technologies,
2、 LLC Page 1 of 5 STYRENE MALEIC ANHYDRIDE COPOLYMER (SMA), WSB-M4D857-A2 RUBBER MODIFIED, 16% GLASS FIBER REINFORCED MOLDING COMPOUND 1. SCOPE The material defined by this specification is a rubber modified, 16% glass fiber reinforced, styrene maleic anhydride copolymer thermoplastic molding compoun
3、d. The glass fibers are coated with a non-PVA (polyvinyl acetate) binding agent which can withstand mold temperatures of 315 C, without producing mold corroding by-products. 2. APPLICATION This specification was released originally for material used for the structural base of instrument panels lamin
4、ated with soft trim materials on the finished surface. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirement
5、s 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 2.6 6.0 g/10 minutes (ISO 1133, 220 C, 10 kg) The material shall be dried for 3 h min
6、at 100 C in a mechanical convection oven immediately preceding the test. (s) 3.4.2 Glass Fiber Content 14 - 19% (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
7、injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D857-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 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 +
8、/- 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 1.15 - 1.20 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 68.0 MPa (ISO
9、R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) (s) 3.5.4 Flexural Modulus, min 4.7 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.2 - 2.0 GPa (ASTM D 4065, forced constant amplitude, fixed frequency o
10、f 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). Additionally, a Shear Modulus versus Temperature curve shall be plotted for -5
11、0 to +150 C temperature range, at 5 C min 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 +/- 2 C 7.0 kJ/m23.5.6.2 At -40 +/- 1 C 5.0 kJ/m2The t
12、est 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 cold box. (s) 3.5.7 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 1
13、.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 silica gel. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D857-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 o
14、f 5 (s) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 100 +/- 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) 3.5.8.1 T
15、ensile Strength at Max Load +/- 15% Percent Change (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h
16、) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795/SAE J369) 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 gi
17、ven below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5.6-5/C (ASTM E 831 TMA, temperature range -30 to +30 C) 5.2 MOLD SHRINKAGE (ISO 2577, approximately 150 x 100 x 3.2 +/- 0.2 mm injection molded speci
18、men) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.25 - 0.45% ENGINEERING MATERIAL SPECIFICATIONWSB-M4D857-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1% .
19、After 30 minutes at 120 C 0.3% 5.3 MULTI AXIAL IMPACT AT MAX LOAD, min (ASTM D 3763, 100 x 100 x 2.5 +/- 0.2 mm edge gated injection molded specimens) Test velocity at initial contact with the test specimen shall be 6.7 m/s and must not change by more than 10% during the impact event. Load energy and velocity are to be recorded as a function of displacement. 5.3.1 At 23 C 5.0 J 5.3.2 At -30 C 4.0 J 5.4 RECYCLING CODE SMA-GF16 ENGINEERING MATERIAL SPECIFICATIONWSB-M4D857-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
