1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 15 N-STATUS No replacement named J. Crist, NA 2006 03 20 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1991 07 01 Released EP00E01089486000 M. Siewert Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC
2、 Page 1 of 5 POLYAMIDE (PA) 46, HEAT STABILIZED, OIL WSK-M4D811-A IMPREGNATED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyamide 46 molding compound prepared by polycondensation of diaminobutane and adipic acid, oil impregnated and stabi
3、lized against hot air. 2. APPLICATION This specification was released originally for material used for steering column bearings. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moisture absorpti
4、on or loss in the service/assembly environment. 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). 3.3 CONDITIONING AND TEST CONDITIONS All test values
5、indicated herein are based on material and specimens with moisture content not exceeding 0.2% (test according to ISO 960, Method B/ASTM D 789). All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture content exceeds 0.2%, c
6、ondition 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. Individual specimens shall not be removed from closed containers until immediately before testing. 3.4 MOLDING COMPOUND
7、 3.4.1 Melt Temperature 287 - 295 C (ISO 1218, Method B/ASTM D 789, or DSC - ASTM E 794) 3.4.2 Mineral Oil Content 0.1 - 1.0% (FLTM AP 150-04, use pellet shavings as test material, solvent: 1,1,1 trichloroethane) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D811-A Printed copies are uncontrolled Copyrigh
8、t 2010, 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
9、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 1.26 - 1.31 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.
10、5.3 Tensile Strength at Yield, min 70 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.3.1 Elongation at Yield, min 4% (Test Method acc. to para 3.5.3) 3.5.4 Flexural Modulus, min 2.3 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2
11、mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 0.90 - 1.35 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 tim
12、e 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
13、 A/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 2.4 kJ/m23.5.6.2 At -40 +/- 2 C 2.2 kJ/m2 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D811-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 The test sp
14、ecimens 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
15、 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 110 C 3.5.7.2 At 0.45 MPa 265 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall b
16、e 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 with a smooth surfac
17、e. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 70 Formation of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LI
18、NEAR THERMAL EXPANSION 7 13-5/C (ASTM D 696) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D811-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage .
19、After 48 h at 23 +/- 2 C 1.4 - 2.2% 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 - 0.05% 5.3 WATER ABSORPTION 1.8 - 2.2% (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 IMP
20、ACT 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 12 kJ/m2The notched specimens shall be immersed for 48 h in distilled 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-M4D811-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
