1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 09 23 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 Updated L. Rodigas 1989 03 01 Released SM/EQ2762 TP M. Siewert Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 8 ACETAL (POM) HOMOPOLYMER,
2、 MELT FLOW WSK-M4D637-A1 RATE 1 - 3 ACETAL (POM) HOMOPOLYMER, MELT FLOW WSK-M4D637-A2 RATE 11 - 17 ACETAL (POM) HOMOPOLYMER, MELT FLOW WSK-M4D637-A3 RATE 19 - 32 ACETAL (POM) HOMOPOLYMER, MELT FLOW WSK-M4D637-A4 RATE 34 - 44 1. SCOPE The material defined by these specifications is a thermoplastic ac
3、etal homopolymer based on formaldehyde with melt flow rates from 1 to 44 g/10 minutes. 2. APPLICATION These specifications were released originally for materials used for functional automotive applications. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and par
4、t producers must conform to the Companys Standard Requirements 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, g/10 minutes (ISO 1133,
5、 190 C, 2.16 kg) A1 A2 A3 A4 1 - 3 11 - 17 19 - 32 34 - 44 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. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies a
6、re uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of 8 The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B.
7、 The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.39 - 1.44 (ISO 1183, Method A) g/cm3(s) 3.5.3 Tensile Strength at Yield, min 62 MPa (ISO R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) (s) 3.5.3.1 Elongation at Break, %, min (Test
8、Method according to para 3.5.3)A1 A2 A3 A4 25 10 10 5 (s) 3.5.4 Flexural Modulus, GPa, min (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed 64 mm support span) A1 A2 A3 A4 2.5 2.6 2.6 3.0 3.5.5 Shear Modulus at 23 C, GPa (ASTM D 4065, forced constant amplitude, fixed frequency of
9、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 vs. Temperature curve shall be plotted for -50 to +
10、150 C temperature range, at 5 C min intervals. The plotted curves must be within tolerance ranges shown on pages 5 (-A1), 6 (-A2), 7 (-A3), and 8 (-A4). A1 A2 A3 A4 0.80 - 1.20 0.84 - 1.26 0.80 - 1.20 0.82 - 1.37 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies are uncontrolled
11、 Copyright 2005, Ford Global Technologies, LLC Page 3 of 8 (s) 3.5.6 Impact Strength, Izod, kJ/m2, 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 A1 A2 A3 A4 7.0 5.5 4.5 4.5 3.5.6.2 At -40 +/- 2 C A1 A2 A3 A4 6.0 4.0 3.5 4.0 The test specimens m
12、ust 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, C, min (ISO 76, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.34 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa A1 A2 A3 A
13、4 100 100 100 92 3.5.7.2 At 0.45 MPa A1 A2 A3 A4 150 160 160 150 3.5.8 Heat Aging Performance (A1 - A4) (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength Change, % (T
14、est Method per para 3.5.3) A1 A2 A3 A4 +/- 20 +/- 20 +/- 20 +/- 20 3.5.8.2 Impact Strength, Izod Change, % +/- 60 (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Glo
15、bal Technologies, LLC Page 4 of 8 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required
16、 for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 - 14-5/ C (ASTM E 228 or TM,
17、 temperature range -40 to 100 C) 5.2 MOLD SHRINKAGE (ISO 2577, approximately 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.7 - 2.2% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.11 - 0.18% . After
18、30 minutes at 120 C 0.08 - 0.20% 5.3 WATER ABSORPTION 0.22 - 0.35% (ISO 62, 24 h, 50 +/- 1 mm diameter, 3.1 +/- 0.1 mm thick specimen) 5.4 HARDNESS, DUROMETER D 82 - 85 (ISO 868, 15 s dwell) 5.5 DIMENSIONAL STABILITY The phrase “anneal after molding” shall appear on engineering drawings when dimensi
19、onal stability and/or improved frictional characteristics are engineering requirements. 5.6 RECYCLING CODE POM ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D63
20、7-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 6 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 7 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D637-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 8 of 8
