1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 15 N-STATUS No replacement named J. Crist, NA 2006 03 15 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1991 02 01 Released EP00E01089481000 M. Siewert Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC
2、 Page 1 of 4 POLYAMIDE (PA) 12, RIGID, HEAT STABILIZED WSK-M4D801-A 12% GRAPHITE FILLED MOLDING AND EXTRUSION COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a rigid, heat stabilized graphite filled polyamide 12 molding and extrusion compound. 2. APPLICA
3、TION This specification was released originally for material used for side door latch cables. 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
4、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 indicated herein are based on mater
5、ial 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%, condition the material for a minimum
6、 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 3.4.1 Melt Temperature 175 - 185 C
7、 (ISO 1218/ASTM D 789, or DSC - ASTM E 794) 3.4.2 Graphite Content 10 - 14% (FLTM BO 106-04, Method B) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens ENGINEERING MATERIAL SPECIFICATIONWSK-M4D801-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4
8、 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, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center por
9、tion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.06 - 1.10 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Yield, min 40 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/mi
10、nute test speed) 3.5.3.1 Elongation at Yield, min 4% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.8 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 Shear Modulus at 23 C 780 - 1300 MPa (ASTM D 4065, forced constant
11、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 minimum). Additionally, a Shear Modulus vs. Temperature curve sh
12、all 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 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2
13、 C 3 kJ/m23.5.6.2 At -40 +/- 2 C 3 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, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection
14、Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D801-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.5.7.1 At 1.82 MPa 45 C 3.5.7.2 At 0.45 MPa 130 C 3.5.8 Heat Aging Performance (ISO 188/A
15、STM D 573, 150 +/- 50 air changes/h, 1000 h at 120 +/- 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 be determined at the time of the aged properties determination) 3.5.8.1 Impact Strength, Izod Change +/- 25% (Test
16、 Method per para 3.5.6.1, specimens to be notched before heat aging) 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 70 Formation of excessive a
17、mounts 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 LINEAR THERMAL EXPANSION 7 10-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577,
18、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 0.7 - 1.7% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.03 - 0.1% . After 30 minutes at 120 C 0.1 - 0.3% 5.3 WATER ABSORPTION 0.1 - 0.3% (ISO 62, 24 h/ASTM D 570, 24 h 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D801-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
