1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 15 N-STATUS No replacement named J. Crist, NA 2006 02 21 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1992 10 01 Released EP00E10176308000 K. Gerhards Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
2、C Page 1 of 5 POLYAMIDE 66 (PA66), HEAT STABILIZED, WSK-M4D795-A MOLYBDENUM DISULFIDE FILLED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a heat stabilized, molybdenum disulfide (MoS2) filled polyamide 66 molding compound. 2. APPLICATION This
3、specification was released originally for material used for the snapfit onto ball studs of throttle body control mechanism. 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
4、 loss in the service/assembly environment. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIAL 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 indica
5、ted 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%, conditi
6、on 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 3.4.1
7、 Molybdenum Disulfide Content 0.5 - 3.0% (FLTM BO 106-04, Alternate Method B, except: apparatus - Mettler TA 3000, TGA 50, purified air at 2 L/h flow rate. Set ramp temperature for 20 K/minute up to 650 C. Start at 200 C, or at 30 C if volatile substances are present. Equilibrate at 430 C for 10 min
8、utes) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D795-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 Calculation: The remaining mass in grams is multiplied by 1.14 to compensate for mass loss of MoS2 between 200 and 650 C. Divide obtained value by the origin
9、al weight in grams and multiply by 100 to obtain % of MoS2. 3.4.2 Melt Temperature 250 - 265 C (ISO 1218, Method B/ASTM D 789, or DSC - ASTM E 794) 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
10、 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 portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294.
11、No annealing allowed. 3.5.2 Density 1.13 - 1.18 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Yield, min 75 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 2% (Test Method according to para 3.5.3) 3
12、.5.4 Flexural Modulus, min 2.5 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 1.2 - 1.3 GPa (ASTM D 4065, forced
13、 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 at each temperature interval - 3 minutes minimum). Additionally, a Shear Modulus vs. Temperatur
14、e curve shall be plotted for -50 to +250 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D795-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.6 Imp
15、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 for each test) 3.5.6.1 At 23 +/- 2 C 1.0 kJ/m23.5.6.2 At -40 +/- 2 C 1.0 kJ/m2The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact
16、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 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm) 3.5.7.1 At 1.80 MPa 70 C 3.5.7.2
17、 At 0.45 MPa 200 C 3.5.8 Heat Aging Performance (ISO 188/ASTM 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 determi
18、nation) 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 surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 90 For
19、mation 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 LINEAR THERMAL EXPANSION 7 8-5/C (ASTM D 696) 5.2 MOLD S
20、HRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D795-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.2 - 2.0% 5.2.2 Post Shrinkag
21、e (Separate specimens required for each test) . After 48 h at 80 C 1.0 - 1.7% . After 30 minutes at 120 C 0.9 - 1.5% 5.3 WATER ABSORPTION 1.1 - 1.5% (ISO 62, 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, Meth
22、od A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 5 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. 5.5 RECYCLING CODE SAE or PA66 PA66 OPTIONAL ENGINEERING MATERIAL SPECIFICATIONWSK-M4D795-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
