1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 03 N-STATUS Replaced by WSK-M4D795-A A. Reaume/M. Masserant 2005 01 13 Revised Inserted 3.0; Deleted 3.1, 3.2.1, 3.2.2, 3.3.3, 3.4 & 4 1963 08 23 Released CF6-PA412030 Printed copies are uncontrolled Copyright 2006, Ford Global Technol
2、ogies, LLC Page 1 of 3 NYLON (TYPE 66), GLASS FIBER REINFORCED MOLYBDENUM ESF-M4D159-A DISULFIDE FILLED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a type 66 nylon molding compound reinforced with glass fibers and filled with molybdenum disulfide. 2. APPLICAT
3、ION This specification was released originally for material used for needle bearing retainers on alternators and gears on windshield wipers. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moist
4、ure absorption or loss in the service/assembly environment. Information on this material with respect to moisture should be obtained from the responsible PEO Materials Engineering Department. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers mus
5、t conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 MOLDED TEST SPECIMEN The following requirements are intended for initial source qualifications, and Initial Sample Inspection Report. These will be rechecked at intervals specified by Quality Assurance. 3.
6、2.3 Specific Gravity 1.40 - 1.47 (ASTM D 792) 3.2.4 Glass Fiber Content, by weight, min 28.0% (Appendix I) 3.2.5 Molybdenum Disulfide Content, by weight 3.0 - 6.0% (Appendix I) 3.2.6 Tensile Strength, min 18,000 psi (125 MPa) (ASTM D 638, 0.2 in (5 mm)/min) Elongation, min 1.5% 3.2.7 Impact Strength
7、 Izod, min 2.0 ft.lb/in. (107 J/m) (ASTM D 256, 1/2 x 1/4 in (12.7 x 6.4 mm) samples) ENGINEERING MATERIAL SPECIFICATIONESF-M4D159-APrinted copies are uncontrolled Copyright 2006 Ford Global Technologies, LLC Page 2 of 3 3.2.8 Deflection Temperature, min (ASTM D 648, 1/2 x 1/2 in (12.7 x 12.7 mm) sa
8、mples) At 66 psi (455 kPa) 260 C At 264 psi (1820 kPa) 254 C 3.3 MOLDED PART 3.3.1 Color Natural or as specified on engineering drawing. 3.3.2 Appearance Shall be uniform in density, texture and finish, free of visible porosity, warpage, heat corch, checks, cracks, chipped edges and uneven surfaces.
9、 They shall also be free of other contamination. 3.3.4 The following requirements will be used as acceptance criteria for molded parts. The tests indicated will be conducted by Ford Motor Company at its option. Moisture Absorption, max 3.0% (ASTM D 570, 24 h immersion) Glass Fiber Content, min 28.0%
10、 (Appendix I) 80% of glass fibers must be 1/4 in (6.4 mm), unless specified otherwise on engineering drawing and/or engineering part specification. Molybdenum Disulfide Content 3.0 - 6.0% (Appendix I) 5. GENERAL INFORMATION The information given below is provided for assistance and clarification in
11、meeting the requirements of this specification. 5.1 FLEXURAL MODULUS At 23 +/- 2 C 1.19 x 106psi (8.2GPa) At 77 C 0.79 x 106psi (5.5GPa) 5.2 MOLD SHRINKAGE 1/8 in (3.2 mm) avg section 0.0025 1/4 in (6.4 mm) avg section 0.0030 1/2 in (12.7 mm) avg section 0.0040 5.3 DEFORMATION UNDER LOAD 0.35% At 40
12、00 psi (27.6 MPa) 5.4 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.54 x 10-5/ C ENGINEERING MATERIAL SPECIFICATIONESF-M4D159-APrinted copies are uncontrolled Copyright 2006 Ford Global Technologies, LLC Page 3 of 3 APPENDIX I Determination of molybdenum disulfide and glass fiber fillers in nylon compou
13、nds. Weigh a 1-2 g sample correct to the nearest 0.1 mg. Introduce into a 300 mL tall-form beaker. Add 25 mL of concentrated sulfuric acid (H2SO4) and heat to dense fumes. Remove from heat, cool and add 5 mL concentrated nitric acid (HN03). Heat again to dense fumes and repeat the additions of HN03u
14、ntil the organic matter is completely destroyed (until solution is pale yellow). Remove from heat, cool and add 3-5 mL of peroxide (30% H2O2). Heat again to dense fumes of H2SO4. Remove from heat, cool and dilute to 100 mL volume cautiously with distilled water. Boil for 30 min to destroy peroxide.
15、Remove from plate and cool, again bringing the volume to 100 mL with water. Filter through #41 Whatman filter paper and wash until acid free to litmus. Ignite the paper in a tared porcelain crucible at 538 C. Cool, dessicate and weigh. Residue x 100% = % Glass Fiber - Sample Weight To the recovered
16、filtrate, add concentrated ammonia (NH40H) until the filtrate is alkaline to phenolphthalein. Add 25 mL of aqueous ammonium sulfide or saturate with gaseous hydrogen sulfide. Carefully acidify with dilute (1 to 1) H2SO4, until acidic to methyl orange. Boil incipiently until no odor of hydrogen sulfide is detected. Filter through #42 Whatman filter paper and wash until acid free to litmus. Ignite the paper in a tared, covered platinum crucible at 538 C. Cool, dessicate and weigh. Residue 160.15 - x - x 100% = % Molybdenum Disulfide Sample Weight 143.95
