1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 11 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 2000 11 08 Revised Updated A. Cockman 1989 09 29 Released SM/EQ035825 TP M. Siewert Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 5 POLYA
2、MIDE (PA) 46, HEAT STABILIZED WSK-M4D671-A MOLDING COMPOUND 1. SCOPE The material defined by this specification is a polyamide 46 molding compound prepared by polycondensation of diaminobutane and adipic acid and stabilized against hot lubricants. 2. APPLICATION This specification was released origi
3、nally for material used for the oil inner screen automatic transmission. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moisture absorption or loss in the service/assembly environment. 3. REQUI
4、REMENTS Material specification requirements are to be used for initial qualification 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). 3.3 CONDITIONING A
5、ND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. All test materials immediately after
6、 processing have to be sealed in containers that are impermeable to water vapor. If the moisture content exceeds 0.2%, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure below 133 Pa. Conduct tests in a controlled atmosphere of 23 +/- 2 C and 50 +/-5% relative humidity.
7、Individual specimens shall not be removed from closed containers until immediately before testing. 3.4 MOLDING COMPOUND 3.4.1 Melt Temperature 290 - 295 C (ISO 1218, Method B/ASTM D 789 or DSC - ASTM E 794) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D671-APrinted copies are uncontrolled Copyright 2005,
8、 Ford Global Technologies, LLC Page 2 of 5 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 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, IS
9、O 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 1.15 - 1.19 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Ten
10、sile Strength at Yield, min 90 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 3.5.3.1 Elongation at Yield, min 10% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 2.6 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm
11、 specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 0.89 - 1.33 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
12、at each temperature interval - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +280 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/
13、ASTM D 256, Method A, 80 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 6 kJ/m 3.5.6.2 At -20 +/- 2 C 4 kJ/m 3.5.6.3 At -40 +/- 2 C 2 kJ/m ENGINEERING MATERIAL SPECIFICATIONWSK-M4D671-APrinted copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Pag
14、e 3 of 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, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D
15、 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 145 C 3.5.7.2 At 0.45 MPa 270 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 135 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged pro
16、perty values shall be determined 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) 3.6 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
17、 with a smooth surface. 3.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and
18、 assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 6.3 - 7.3-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D671-APrinted copies are uncontro
19、lled Copyright 2005, Ford Global Technologies, LLC Page 4 of 5 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1.2 - 1.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.01 - 0.02% After 30 minutes at 120 C 0.01 - 0.03% 5.3 WATER ABSORPTION 2.0 - 2.4% (ISO 62,
20、24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 IMPACT STRENGTH, IZOD, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 40 kJ/m The notched specimens shall be immersed for 48 h in d
21、istilled water at 50 +/- 1 C and subsequently conditioned for 1 h at 23 +/- 2 C and 50 +/- 5% relative humidity prior to test and tested under the same conditions within 1 h. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D671-APrinted copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 5
