1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver. 4 2008 07 29 N-STATUS Replaced by WSB-M4D690-A C. Boese, FNA 2005 10 26 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9, 4; Corrected numbering 3.5.8 1989 08 31 Released SM/EQ7118 TP P. Kuntze Printed copies are uncontrolled Copyri
2、ght 2008, Ford Global Technologies, LLC Page 1 of 5 ABS MOLDING COMPOUND, HIGH HEAT RESISTANT, WSK-M4D656-A HIGH IMPACT STRENGTH NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high impact strength, high heat resistant molding compound with a defined and improv
3、ed stress crack resistance, based on acrylonitrile-butadiene-styrene (ABS). 2. APPLICATION This specification was released originally for material used for front lamp housings. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQ
4、UIREMENTS 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 Rate 3 - 6 g/10 minutes (ISO 1133/ASTM D 1238, 220 C, 10 kg) The material shall be dried for min
5、 of 2 h at 80 - 85 C in a mechanical convection oven immediately prior to testing. 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 specimens. The following dimensions are required: A. 150 mi
6、n 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 annealing allowed. 3.5.2 Density 1.04 - 1.08 g/cm (ISO 1183, M
7、ethod A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSK-M4D656-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 5 3.5.3 Tensile Strength at Max Load, min 45 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test sp
8、eed) 3.5.4 Flexural Modulus, min 2.35 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 760 - 1140 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 6
9、0 x 10 x 2.5 +/- 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 vs. Temperature curve shall be plotted for -50 to +120 C temperature range, at 5 C minimum intervals. The plo
10、tted 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, 63.5 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 20 kJ/m 3.5.6.2 At 0 +/- 2 C 11 kJ/m 3.5.6.3 At -40 +/- 2 C 6.5 kJ/m The test spe
11、cimens 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 outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0
12、/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 80 C 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. 3.5.8 Vicat Softening Temperature, min (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicon
13、e oil, temp. raise 50 +/- 5 C/h. Dial gage reset to “0“ after addition of 5 kg weight.) ENGINEERING MATERIAL SPECIFICATION WSK-M4D656-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 5 All specimens dry as molded. If not tested immediately after molding, spec
14、imens must be stored in a sealed, moisture-proof container filled with silica gel. 3.5.8.1 At 49.0 N 102 C 3.5.9 Heat Ageing 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 determination).
15、3.5.9.1 Tensile Strength at Max Load Change +/- 15% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change (Test Method per para 3.5.6.1, specimens to be notched before heat aging) After 24 h Change, max -15% 24 h to 1000 h Change, max -20% Original values based on 4 h data) 3.6 FLAMMABIL
16、ITY (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 ENVIRONMENTAL STRESS CRACK RESISTANCE No cracking or (ISO 4599/SAE J2016, except define % strain to crazing at failure in each test medium. Test speci
17、men A acc. specified strain to para 3.5.1, minimum 10 specimens for each test) Test Procedure: Allow 30 min contact with specified fluid at 23 +/-2 C. At the end of the test period, remove the contact material mechanically or by wiping with a soft cloth. Do not use a solvent. Allow the strained samp
18、le to condition for 1 h at 23 +/- 2 C and 50 +/- 5% relative humidity. Using a stereo microscope, examine the strained sample for cracking and crazing at 20 X magnification while the sample is still in the straining fixture. Test Media Strain +/- 0.02% Fuel B 0.2% (ISO 1817/ASTM D 471) Fuel C 0.2% (
19、ISO 1817/ASTM D 471) Isopropyl Alcohol/Water 0.4% (50/50 % by volume) 86% by volume Ford Dewaxing Fluid 0.7% (FLTM BO 155-01) + 14% by volume of anionic detergent (EAO ONLY) ENGINEERING MATERIAL SPECIFICATION WSK-M4D656-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC
20、Page 4 of 5 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 3.2 +/- 0.2 mm injection
21、molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 0.8 - 1.0% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.1 - 0.2% 5.3 MELT VOLUME RATE 3 - 6 cm/10 minutes ISO 1133/ASTM D 1238, 220 C, 10 kg) The material shall be dried for min of 2 h at 80 -
22、85 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 5.4.1 At 0.45 MPa 95 C 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-M4D656-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 5 of 5
