1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 09 23 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 2000 11 28 Revised Updated A. Cockman 1989 03 01 Released SM/EQ2762 TP M. Siewert Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 8 AC
2、ETAL (POM) COPOLYMER, MELT FLOW WSK-M4D635-A1 RATE 0.7 - 4 ACETAL (POM) COPOLYMER, MELT FLOW WSK-M4D635-A2 RATE 7 - 15 ACETAL (POM) COPOLYMER, MELT FLOW WSK-M4D635-A3 RATE 23 - 35 ACETAL (POM) COPOLYMER, MELT FLOW WSK-M4D635-A4 RATE 43 - 55 1. SCOPE The material defined by these specifications is a
3、thermoplastic acetal copolymer based on trioxane with melt flow rates from 0.7 to 55 g/10 minutes. 2. APPLICATION These specifications were released originally for materials used for functional automotive applications. 3. REQUIREMENTS Material specification requirements are to be used for initial qu
4、alification of materials. 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, g/10 minutes (ISO 1133/ASTM D 1238, 190 C, 2.16
5、kg) A1 A2 A3 A4 0.7 - 4 7 - 15 23 - 35 43 - 55 NOTE: For individual melt flow rates of approved materials see Corporate Approved Source List. 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
6、specimens. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are 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 x 4.0 +/- 0.2 mm Specimens with sho
7、rter 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, g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) A1 A2 A3 A4 1.38 - 1.43 1.38 - 1.43 1.38 - 1.43 1.38 - 1.43 3.5.3 Tensile S
8、trength at Yield, MPa, min (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) A1 A2 A3 A4 60 60 60 60 3.5.3.1 Elongation at Break, %, min (Test Method according to para 3.5.3) A1 A2 A3 A4 25 20 15 15 3.5.4 Flexural Modulus, GPa, min (ISO 178/ASTM D 790M, Method
9、I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) A1 A2 A3 A4 2.3 2.4 2.4 2.4 3.5.5 Shear Modulus at 23 C, 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 specim
10、en A. Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted curves must be within tolerance ranges shown on pages 5 (-A1), 6 (-A2), 7 (-A3), 8 (-A4). A1 A2 A3 A4 0.78 - 1.17 0.87 - 1.31 0.88 - 1.33 0.91 - 1.36
11、ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 8 3.5.6 Impact Strength, Izod, kJ/m2, min (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/-0.1 mm specimen, 10 specimens for each test) 3.5.6.1 A
12、t 23 +/- 2 C A1 A2 A3 A4 5.5 4.0 3.5 3.0 3.5.6.2 At - 40 +/- 2 C A1 A2 A3 A4 4.0 3.5 3.0 2.5 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 within the cold box. If not possible, the test can be
13、conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, C, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa A1 A2 A3 A4 90 95 95 95 3.5.7.2 At 0.45 MPa A1 A2 A3 A4 135 140 140 140 3.5.8 Heat Aging Performance (A1 - A4) (ISO 188/ASTM D 573, 1000 h at 140 +
14、/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8 1 Tensile Strength Change, % +/- 20 (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, % +/- 35 (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLA
15、MMABILITY (A1 - A4) (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. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page
16、 4 of 8 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 (A1 - A4) 11-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (A1 - A4) (ISO 2577, approx. 150 x 100 x 3.2 +/-
17、0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 2.0 - 2.5% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.1 - 0.4% After 30 minutes at 120 C 0.1 - 0.4% 5.3 WATER ABSORPTION (A1 - A4) 0.2 - 0.3% (ISO 62, 24 h/ASTM D 570, 24 h,
18、50 +/- 1 mm diameter, 3.1 +/- 0.1 mm thick specimen) 5.4 HARDNESS, DUROMETER D (A1 - A4) 80 - 88 (ISO 868/ASTM D 2240) 5.5 DIMENSIONAL STABILITY The phrase “anneal after molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineerin
19、g requirements. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page
20、 6 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 7 of 8 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D635-A1/A2/A3/A4Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 8 of 8
