1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2014 08 29 N Status Replaced by WSS-M4D666-B1 B. Harris, NA 2005 10 27 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1989 08 31 Released SM/EQ7118 TP M. Siewert Copyright 2014, Ford Global Technologies, LLC Page 1 of 5 POLYAMIDE
2、 66 (PA66), IMPACT MODIFIED MOLDING WSK-M4D666-A COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an elastomer (EPDM) modified polyamide 66 molding compound. 2. APPLICATION This specification was released originally for material used for spring brake cluc
3、h pedal shaft. 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 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
4、 Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.3 CONDITIONING AND TEST CONDITIONS All te
5、st 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 exceeds 0.2%, co
6、ndition 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 Melt Temperature, min 250 C (ISO 3146, Method C, 10 C/min heating rate) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall b
7、e carried out on injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATION WSK-M4D666-A Copyright 2014, Ford Global Technologies, LLC Page 2 of 5 The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Speci
8、mens 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 1.06 - 1.11 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 44 MPa (ISO R 527, 150 minimum x
9、 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (unfilled), 5 mm/min (filled) (s) 3.5.3.1 Elongation at Yield, min 2% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.7 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Mo
10、dulus at 23 C 563 - 845 MPa (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. Specimen length between clamps 35-40 mm. Soak time at each temperature interval - 3 minutes minimu
11、m) Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimen
12、s for each test) 3.5.6.1 At 23 +/- 2 C 50 kJ/m 3.5.6.2 At -20 +/- 2 C 15 kJ/m 3.5.6.3 At -40 +/- 2 C 10 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. ENGINEERING MATER
13、IAL SPECIFICATION WSK-M4D666-A Copyright 2014, Ford Global Technologies, LLC Page 3 of 5 (s) 3.5.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa 50 C 3.5.7.2 At 0.45 MPa 180 C 3.5.8 Heat Aging Performance (ISO 188, exce
14、pt 150 +/- 50 air changes/h, 1000 h at 100 +/- 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 determination) 3.5.8.1 Tensile Strength at Max Load Change +/- 25% (Test
15、Method per para 3.5.3) heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 90 Formation of clear film or droplets is cause for rejection. 3.7 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
16、smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 9 12-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injec
17、tion molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.1 - 2.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.06 - 0.2% . After 30 min at 120 C 0.04 - 1.2% ENGINEERING MATERIAL SPECIFICATION WSK-M4D666-A Copyright 2014, Ford Global Techno
18、logies, LLC Page 4 of 5 5.3 WATER ABSORPTION 0.8 - 1.2% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 IMPACT STRENGTH, IZOD, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 75 kJ/m The notched specimens s
19、hall 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. 5.5 RECYCLING CODE PA66 ENGINEERING MATERIAL SPECIFICATION WSK-M4D666-A Copyright 2014, Ford Global Technologies, LLC Page 5 of 5
