1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 14 N-STATUS No replacement named J. Crist, NA 2006 02 23 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 12 03 Released EP00E01031542000 M. Siewert Printed copies are uncontrolled Copyright 2010, Ford Global Technologies
2、, LLC Page 1 of 4 ACETAL (POM) COPOPOLYMER, 26% GLASS FIBER WSK-M4D793-A REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a glass fiber reinforced acetal copolymer based on trioxane. 2. APPLICATION This specification was released origin
3、ally for material used for supports of head lamp. 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 Rate 4 - 7 g/1
4、0 minutes (ISO 1133/ASTM D 1238, 190 C, 2.16 kg) 3.4.2 Glass Fiber Content 24 - 29% (ISO 3451/1 Method A, test temperature 600 +/- 25 C, test portion 1 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-en
5、d 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 to IS
6、O 294. No annealing allowed. 3.5.2 Density 1.56 - 1.62 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 98 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D793-A Printed copies
7、are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 3.5.3.1 Elongation at Max Load, min 1.5% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 7.0 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 Shea
8、r Modulus at 23 C 1.40 - 2.34 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
9、minimum). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +160 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 4.0 +/-
10、0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 17 kJ/m23.5.6.2 At -40 +/- 2 C 17 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, if not possible, tes
11、t can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 155 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 1.82 MPa) 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined
12、at the time of the aged properties determination) 3.5.8.1 Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D793-A Pri
13、nted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 90 Format
14、ion of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.5 - 8.5-5/C (ASTM D 696) 5.2 MOLD SHRI
15、NKAGE (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 - 1.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2 - 0.4% . After 30 minutes at 120 C 0.3 - 0.6% 5.3 WATER ABSORPTION 0.
16、6 - 0.8% (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 MELT TEMPERATURE 163 - 168 C (ISO 1218, Method B/ASTM D 789, or DSC-ASTM E 794) 5.5 HARDNESS, DUROMETER D 82 - 87 (ISO 868/ASTM D 2240) 5.6 DIMENSIONAL STABILITY The phrase “anneal after molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineering requirements. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D793-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
