1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 01 21 N-STATUS No replacement named J. Crist, NA 1996 01 19 Activated K. Gerhards WP 3948-a Page 1 of 6 POLYAMIDE 66 (PA66), 30 % GLASS FIBER AND WSS-M4D947-A1 15 % PTFE POWDER FILLED, IMPACT MODIFIED MOL
2、DING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an impact modified type 66 polyamide molding compound filled with 15 % PTFE powder and 30 % glass fiber. 2. APPLICATION This specification was released originally for material used for floater bracket.
3、 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qualification of materials. A Control Plan for ongoing production verification is required. This
4、 plan must be reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to analyze process/product data and assure consistent processing of the materials. Part produce
5、rs using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 s
6、igma values. 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 thermograms established for initial approval shall constitute the reference standar
7、d 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. ENGINEERING MATERIAL SPECIFICATION WSS-M4D947-A1 WP 3948-b Page 2 of 6 3.3 CONDITIONING AND TEST CO
8、NDITIONS All test values indicated herein are based on material and specimens with moisture content not exceeding 0.2 % (test according to ISO 960, Method B). All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture content
9、exceeds 0.2 %, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure below 133 Pa. 3.4 MOLDING COMPOUND (s) 3.4.1 Filler Content 3.4.1.1 Glass Fiber 27.5 - 32.5 % (ISO 3451/4, test temperature 600 +/- 25 C, test portion 1 g) 3.4.1.2 PTFE Content 13 - 17 % (ISO 3146, Method
10、C, 10 C/ minute heating rate) (s) 3.4.2 Melt Temperature, minimum 255 - 265 C (ISO 3146, Method C, 10 C/minute heating rate) 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 fo
11、llowing dimensions are required: A. 150 minimum x 10 x 4.0 +/- 0.2 mm(ISO 3167, Type 1A) B. 120 x 10 x 4.0 +/- 0.2 mm C. 355 x 100 x 1.0 +/-0.1 mm (ISO 3795) Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared accord
12、ing to ISO 294. No annealing allowed. 3.5.2 Density 1.34 - 1.40 (ISO 1183, Method A) g/cm3 (s) 3.5.3 Tensile Strength at Yield, minimum 155 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) (s) 3.5.4 Flexural Modulus, minimum 7.5 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2
13、mm specimen, 2 mm/minute test speed, 64 mm support span) ENGINEERING MATERIAL SPECIFICATION WSS-M4D947-A1 WP 3948-b Page 3 of 6 3.5.5 Shear Modulus at 23 C 1.41 - 2.36 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approximately 60 x 1
14、0 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 versus temperature curve shall be plotted for - 50 to + 200 C temperature range, at 5 C minimum intervals. The pl
15、otted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. (s) 3.5.6 Impact Strength, Izo
16、d, minimum (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 5.0 kJ/m2 3.5.6.2 At - 40 +/- 1 C 4.0 kJ/m2 The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact te
17、st. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 3.5.7 Heat Deflection Temperature, minimum TBD (ISO 75-1 and ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen (use center section of specimen A), flatwise, 0.34 +/- 0.1
18、 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 140 +/- 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 d
19、etermination) 3.5.8.1 Tensile Strength at Yield +/- 25 % Change (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod +/- 25 % Change (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSS-M4D947-A1 WP 3948-b Page 4 of 6 3.6 IMPACT STREN
20、GTH, MULTIAXIAL (ASTM D 3763, 100 mm diameter x 3.2 mm thick smooth surface injection molded specimen. Impact velocity: 2.2 m/s for exterior, 6.6 m/s for interior applications.) 3.6.1 At 23 +/- 2 C TBD J 3.6.2 At - 40 +/- 2 C TBD J 3.6.3 At (TBD) +/- 2 C TBD J 3.7 FOGGING (SAE J1756, 3 h at 100 C he
21、ating, 21 C cooling plate, post test conditioning 1 h) Fog Number, minimum 90 Formation of clear film, droplets or crystals is cause for rejection. 3.8 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 su
22、rface. 3.9 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engi
23、neering drawing. 3.10 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
24、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 proposed changes and obtain the written
25、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 restrictions are defined in Engineering Mater
26、ials Specification WSS-M99P9999-A1. ENGINEERING MATERIAL SPECIFICATION WSS-M4D947-A1 WP 3948-b Page 5 of 6 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall
27、 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 a completed copy of their laboratory test reports, signed by a qualified and authorized representati
28、ve of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to th
29、is specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the
30、requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5.0E-5/ C (ASTM E 831 TMA, temperature range -30 to + 30 C) 5.2 MOLD SHRINKAGE (ISO/DIS 294-3, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 FC 0.2 - 1.5 5.2.2 Post
31、Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.01 - 0.04 % . After 30 minutes at 120 C 0.01 - 0.08 % 5.3 WATER ABSORPTION 0.8 - 1.1 % (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 HEAT DEFLECTION TEMPERATURE 250 C (ISO 75-1 and ISO 75
32、-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, edgewise, 0.32 +/- 0.1 mm deflection. At 1.80 MPa) 5.5 MODULUS OF ELASTICITY tbd GPa (ISO 527-1 and ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 1 mm/minute) 5.6 IMPACT STRENGTH, CHARPY (ISO 179/1eA, 80 x 1
33、0 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 10 specimens for each test) 5.6.1 At 23 +/- 2 C tbd kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSS-M4D947-A1 WP 3948-b Page 6 of 6 5.6.2 At - 40 +/- 1 C tbd kJ/m2 5.6.3 At - ( ) +/- 2 C tbd kJ/m2 The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 5.5 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PA66-(GF30+PTFE-D15)
