1、ENGINEERING MATERIAL SPECIFICATION WP 3948-a Page 1 of 6 POLYAMIDE (PA) 6, HEAT STABILIZED 40 % MINERAL WSK-M4D667-A FILLED 1. SCOPE The material defined by this specification is a mineral filled, heat stabilized polyamide 6 molding compound. 2. APPLICATION This specification was released originally
2、 for material used for the fuel pipe assembly. 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. 3. REQUIREMENTS 3.1 STATISTICAL PR
3、OCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as 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
4、is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermogram established for initial approval shall constitute the refere
5、nce standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on mater
6、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 Date Release No. Release/Revision 2014 10 15 Re-Activated
7、 R. Harris, NA 2014 08 29 N Status R. Harris, NA 1989-08-31 SM/EQ7118 TP Released M. Siewert ENGINEERING MATERIAL SPECIFICATION WSK-M4D667-A WP 3948-b Page 2 of 6 Material Name Specification Number content exceeds 0.2 %, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure
8、 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 3.4.1 COMPOUND Mineral Content 36 - 40 % (ISO 3451/4, test temperature 600 +/- 25 C,
9、test portion 1 g) 3.4.2 Melt Temperature 215 - 225 C (ISO 1218, Method B/ASTM D 789) 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 test specimens. The following dimensions are required: A. 150
10、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. No annealing allowed. 3.5.2 Density 1.42 - 1.47 g/cm (ISO 1183,
11、 Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 80 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4 Flexural Modulus, min 5.0 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span)
12、3.5.5. Shear Modulus at 23 C 1.57 - 2.62 GPa (ASTM D 4065, forced 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) ENGINEERING MATERIAL SPECIFICATION WSK-M4D667-A WP 3948-b Page 3 of 6 Additiona
13、lly, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 210 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen
14、, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 4.5 kJ/m 3.5.6.2 At - 40 +/- 2 C 3.5 kJ/m The 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 con
15、ducted 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) 3.5.7.1 At 1.82 MPa 75 C 3.5.7.2 At 0.45 MPa 180 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. After heat aging test s
16、pecimens 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 Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABIL
17、ITY (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 116-3) Fog Number, min TBD Formation of excessive amounts of clear film or droplets is cause for rejection. 3.8 ADDITIONAL REQUIREMEN
18、TS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the EngineeringENGINEERING MATERIAL SPE
19、CIFICATION WSK-M4D667-A WP 3948-b Page 4 of 6 drawing. 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, constructi
20、on, color, processing or labelling of the 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 pr
21、oposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restric
22、tions 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 the responsible Materials Eng
23、ineering 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 its own laboratory report to
24、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 below is provided for clarificati
25、on and assistance in meeting the requirements to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM D 696) 4.0 - 5.0E-5/ C 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- specimen) 0.2 mm injection molded 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1.1 - 1.4 % 5.2.2
26、Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.05 - 0.15 % ENGINEERING MATERIAL SPECIFICATION WSK-M4D667-A WP 3948-b Page 5 of 6 After 30 minutes at 120 C 0.09 - 0.16 % 5.3 WATER ABSORPTION 0.8 - 1.1 % (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2
27、 mm thick specimen) 5.4 IMPACT STRENGTH, IZOD, min (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 24 kJ/m The 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D667-A WP 3948-b Page 6 of 6 ENGINEERING MATERIAL SPECIFICATION WSK-M4D667-A WP 3948-b Page 7 of 6
