1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 03 N-STATUS Replaced by WSK-M4D673-A A. Reaume/M. Masserant 2005 01 19 Revised Inserted 3.0; Deleted 3.4, 3.5 & 4 1969 07 16 Released E3Y-1072 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 2 NY
2、LON (TYPE 6/6), 33% GLASS FIBER REINFORCED ESE-M4D287-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is heat stabilized nylon (Type 6/6) reinforced with glass fibers. 2. APPLICATION This specification was released originally for material used as an oil seal on va
3、lve stems. 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. Information on this material with respect to moisture should be obtain
4、ed from the responsible PEO Materials Engineering Department. 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). 3.1 MOLDING COMPOUND 3.1.1 Fiberglass C
5、ontent, by weight 30.0 - 35.0% 3.1.2 Melting Point, min 249 C (ASTM D 789) 3.1.3 Water Content, max 0.20% (ASTM D 789) 3.2 MOLDED TEST SPECIMEN Dry as molded 3.2.1 Specific Gravity 1.38 - 1.42 (ASTM D 792) 3.2.2 Impact Strength, Izod, min 2.0 ft lb/in (107 J/m) (ASTM D 256, notched, 23 +/- 2 C, 1/2
6、in (12.7 mm) sample width) 3.2.3 Tensile Strength, min 25,000 psi (172 MPa) (ASTM D 638) 3.2.4 Elongation, min 2.0% (ASTM D 638) 3.2.5 Flexural Modulus, min 1.1 x 106psi (7.6 GPa) (ASTM D 790) ENGINEERING MATERIAL SPECIFICATIONESE-M4D287-A Printed copies are uncontrolled Copyright 2006, Ford Global
7、Technologies, LLC Page 2 of 2 3.2.6 Deflection Temperature, min 243 C (ASTM D 648, 264 psi (1820 kPa) 3.2.7 Relative Viscosity, min 42 (ASTM D 789) Find fiberglass weight first to determine weight of parts required to obtain 11 g of nylon, centrifuge out fibers before checking relative viscosity. 3.
8、2.8 Thermal Stabilizer Present Test Method: Boil 10 g of molded specimen in 50 ml of distilled water for 1/2 h, decant and add with stirring one drop of nitric acid to the water. Add 3 drops of 10% silver nitrate. The formation of a precipitate indicates the presence of heat stabilizer. An optional
9、method may be used if agreed upon by the supplier and the affected product engineering office. 3.3 MOLDED PARTS 3.3.1 Parts shall be uniform in density, texture, finish, free of porosity, warpage, heat scorch, checks, cracks, chipped edges and uneven surfaces. They shall also be free of other contam
10、ination. 3.3.2 Specific Gravity 1.38 - 1.42 (ASTM D 792) 3.3.3 Fiberglass Content, by weight 30.0 - 35.0% 3.3.4 Melting Point, min 249 C (ASTM D 789) 3.3.5 Expansion Impact Resistance (FLTM BO 021-04, valve stem seal only. Dry 1 h at 177 +/- 3 C and cool to room temperature in a moisture free contai
11、ner before testing.) As specified on engineering drawing. 3.3.6 Water Content, min 2.0% (ASTM D 789, as received) 3.3.7 Relative Viscosity, min 40 Test Method: Same as para. 3.2.7. 3.3.8 Hot Strength, travel, max As specified on (Valve stem seal only) engineering drawing Test Method: Put a seal on a
12、 clean rod of 0.3423 - 0.3416 in (8.694 - 8.677 mm) diameter, place a weight equal to 500 times the weight of the seal on top. Heat the assembly for 1 h at 177 +/- 3 C in an air circulating oven and then cool for 1 h at room temperature. Repeat for 3 cycles. Measure travel of seal on the rod. 3.3.9 Thermal Stabilizer Present Test Method: Same as para 3.2.8.
