1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2011 06 23 N Status Replaced by WSS-M4D792-B1 A. Pan, APA 2006 02 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1991 03 01 Released EP00E01089482000 P. Kuntze Printed copies are uncontrolled Copyright 2011, Ford Global T
2、echnologies, LLC Page 1 of 4 ABS MOLDING COMPOUND, HIGH HEAT RESISTANT WSK-M4D792-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high heat resistant molding compound based on acrylonitrile/butadiene/styrene. 2. APPLICATION This specification was released ori
3、ginally for material used for non-visible and painted parts. 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). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rat
4、e 2.5 - 6 g/10 minutes (ISO 1133/ASTM D 1238, 220 C, 10 kg) The material shall be dried for min of 2 h at 80 - 85 C in a mechanical convection oven immediately preceding the test. 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out o
5、n 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/or B. The specimens shall be
6、 prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.04 - 1.12 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 50 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute) 3.5.3.1 Elongation at Break, min 8% (Test Method a
7、ccording to para 3.5.3) ENGINEERING MATERIAL SPECIFICATION WSK-M4D792-A Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 4 3.5.4 Flexural Modulus, min 2.5 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.
8、5.5 Shear Modulus at 23 C 900 - 1300 MPa (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 m
9、inutes minimum). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +120 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4
10、.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 8 kJ/m2 3.5.6.2 At -40 +/- 2 C 3.5 kJ/m2 3.5.6.3 At -10 +/- 2 C 5.5 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
11、 within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 89 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 1.82 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a s
12、ealed, moisture-proof container filled with silica gel. 3.5.8 Vicat Softening Temperature, min 110 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 t
13、ested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties dete
14、rmination) 3.5.9.1 Tensile Strength at Max Load Change +/- 15% (Test Method per para 3.5.3) ENGINEERING MATERIAL SPECIFICATION WSK-M4D792-A Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 3 of 4 3.5.9.2 Impact Strength, Izod -25% Change, max (Test Method per para 3
15、.5.6.1,specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.9 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 90 Formation of excessive amounts of clear fil
16、m 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 THERMAL EXPANSION 7.5-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x
17、3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.5 - 0.8% 5.2.2 Post Shrinkage . After 48 h at 80 C 0.05 - 0.15% 5.3 MELT VOLUME RATE 2.5 - 6 cm3/10 minutes (ISO 1133/ASTM D 1238, 220 C, 10 kg) The material shall be dried for min of 2 h at 80 - 85 C in a
18、 mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, min 98 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D792-A Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 4 of 4
