1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 04 2013 04 15 N Status Replaced by WSK-M4D648-A R. Harris, NA 2011 07 27 Re-activated reactivated M. Dumitrescu, NA 1989 05 19 SM/EQ9548 TP Released M. Siewert Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page
2、 1 of 4 POLYAMIDE (PA) 66 MOLDING COMPOUND WSK-M4D647-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyamide 66 molding compound. 2. APPLICATION This specification was released originally for material used for retainer guides. NOTICE: This material absorbs
3、 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 Material specification requirements are to be used for initial qualification of materials. 3.0
4、 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled
5、atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture conte
6、nt exceeds 0.2%, condition the material for a minimum of 16 h at 40 - 50 C at a reduced pressure 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.
7、4 MOLDING COMPOUND 3.4.1 Melt Temperature 250 - 265 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D647
8、-A Copyright 2013, Ford Global Technologies, LLC Page 2 of 4 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 Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specim
9、ens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.12 - 1.16 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Yield, min 70 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 3.5.4 Flexural Modulus, min 2.
10、5 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 824 - 1236 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
11、 center of specimen A.) Additionally, a Shear Modulus vs. 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 4. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 63.5
12、 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 3.5 kJ/m2 3.5.6.2 At -40 +/- 2 C 3.0 kJ/m2 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, i
13、f not possible, test can be conducted 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 65 C 3.5.7.2 At 0.45 MPa 210 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 100 +/- 2 C. After heat aging t
14、est 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 Method per para 3.5.3) ENGINEERING MATERIAL SPECIFICATION WSK-M4D647-A
15、 Copyright 2013, Ford Global Technologies, LLC Page 3 of 4 3.6 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 surface. 5. GENERAL INFORMATION The information given below is provided for clarification a
16、nd assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.8 - 8.8-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1.2 - 2.0% 5.2.2 Post S
17、hrinkage (Separate specimens required for each test) After 48 h at 80 C 0.1 - 0.3% After 30 minutes at 120 C 0.2 - 0.5% 5.3 WATER ABSORPTION 1.2 - 1.5% (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 IMPACT STRENGTH, IZOD, min (ISO 180, Method A/ASTM D 256, M
18、ethod A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 20 kJ/m2 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-M4D647-A Copyright 2013, Ford Global Technologies, LLC Page 4 of 4
