1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 01 07 N-STATUS No replacement named J. Crist, NA 1988 07 01 Revised 1987 02 26 Released WP 3948-a Page 1 of 4 NYLON 6, 34% MINERAL FILLED - HEAT STABILIZED ESA-M4D429-A4 - HIGH IMPACT - EXTERIOR PAINTED N
2、OT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a injection molding grade mineral filled type 6 nylon with high mechanical and thermal properties, good surface finish, excellent moldability, and dimensional stability. 2. APPLICATIONS This specification was release
3、d originally for material used for exterior painted wheel cover and ornament applications 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 envi
4、ronment. Information on this material with respect to moisture should be obtained from the responsible PEO Materials Engineering Department. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as
5、 described therein is required for material/source approval. Appropriate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduc
6、t infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and therm
7、ograms that correspond to the reference standard when tested under the same conditions. 3.3 HEAT STABILIZER ADDITIVE Ford Motor Company, at its option, may conduct following heat stabilizer additive test on material/parts supplied to this specification. The stabilizer must be present as determined b
8、y one of the following tests: ENGINEERING MATERIAL SPECIFICATION ESA-M4D429-A4 WP 3948-b Page 2 of 4 Test Method A: To a 10 mL ground glass stoppered graduate add 0.5 mL glacial acetic acid, 1.5 mL of 3% hydrogen peroxide solution (fresh) and a 1 mL of carbon tetrachloride. Place 20 g of nylon pelle
9、ts and 40 g of distilled water in a beaker. Allow the water to boil gently for 5 min. Decant off the water into another beaker. Add 7 mL of this decanted water to the previously prepared test solution and shake the mixture vigorously for about 15 s. If the carbon tetrachloride which settles on the b
10、ottom is purple, the heat stabilizer system is present. Test Method B: Place 20 g of nylon pellets and 50 g of distilled water in a beaker. Allow the water to gently boil for five minutes. Decant the water into another beaker. Add 40 mL of this decanted water to a 50 mL ground glass stoppered gradua
11、te. Add while stirring 3 mL of nitric acid, two drops of 1 N potassium permanganate solution, and 7 mL of carbon tetrachloride. Shake the mixture vigorously for about 15 s. If the carbon tetrachloride, which settles to the bottom, is brown or purple, the heat stabilizer additive is present. 3.4 COND
12、ITIONING & TEST CONDITIONS All test values indicated herein are based on material and specimens with moisture content not exceeding 0.2% (test according to ASTM D 789). All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moistur
13、e content exceeds 0.2%, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure below 133 kPa. 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
14、. 3.5 MOLDING COMPOUND 3.5.1 Melting Point 210 - 225 C (ASTM D 789) 3.5.2 Moisture Content, max 0.20% (ASTM D 789) 3.5.3 Filler Content, by weight 34 +/- 2.0% (ASTM D 2584, Method A, 1 h at 600 C) 3.6 MOLDED TEST SPECIMENS 3.6.1 Preparation of Test Specimens All test specimens shall be injection mol
15、ded in accordance with ASTM D 1897. The values of this specification are based on injection molded, unannealed specimens, unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION ESA-M4D429-A4 WP 3948-b Page 3 of 4 3.6.2 Density 1.40 +/- 0.04 g/cm3 (ASTM D 792) 3.6.3 Tensile Strength, min 70 M
16、Pa (ASTM D 638, Type I specimen, 3.2 mm thick, test speed 5 mm/min) Elongation, min 15% 3.6.4 Flexural Modulus, min 3.9 GPa (ASTM D 790, Method I, Procedure A, 3.2 mm thick specimen, 5 mm/min test speed) 3.6.5 Impact Strength, Izod, min 64 J/m (ASTM D 256, 6.4 mm thick specimens, minimum of 10 speci
17、mens) 3.6.6 Impact Strength, Gardner, min 40.7 J (FLTM BO 17-2, 3.2 mm thick specimens) 3.6.7 Heat Deflection Temperature, min 70 C (ASTM D 648, at 1.82 MPa, 6.4 mm thick specimens) 3.7 ADDITIONAL REQUIREMENTS Specific requirements for physical properties of molded or extruded parts shall be specifi
18、ed on the engineering drawing and/or engineering part specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.8 PAINTABILITY When painted, the finished part shall conform to the requirements of Engineering Performance Specification
19、 ESB-M2P7-B1. 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the
20、material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written appr
21、oval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. ENGINEERING MATERIAL SPECIFICATION ESA-M4D429-A4 WP 3948-b Page 4 of 4 Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed
22、by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by
23、the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity
24、its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information give
25、n below is provided for assistance and clarification and does not represent requirements to this specification. 5.1 MOLD SHRINKAGE 0.009 - 0.011 (ASTM D 955) 5.1.1 Post Shrinkage 0.002 - 0.003 (After 48 h at RT) 5.2 HARDNESS, ROCKWELL R 122 (ASTM D 785) 5.3 WATER ABSORPTION, max 1.08% (ASTM D 570, 24 h immersion) 5.4 APPROVED PRIMERS AND TOPCOATS ESA-M16J2-A Paint, Color Coat, First Surface Exterior ESB-M6J127-A/B Primer Surfacer, Exterior ESB-M32J101-A Paint, Enamel, Acrylic ESB-M50J100-B Paint, Enamel, Acrylic Baking
