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1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2005 09 07 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.7, 3.8 & 4 1988 02 29 Release SM/EQ2386 TP Siewert Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 4 POLYAMIDE (PA) 6, IMPACT MODIFIED, WSK-M4D578-A
2、MOLDING COMPOUND 1. SCOPE The material defined by this specification is a polyamide 6 molding compound modified with a polyethylene copolymer. 2. APPLICATION This specification was released originally for material used for fastening elements of headlamps. NOTICE: This material absorbs and retains mo
3、isture. 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 Material suppliers and part producers must conform to the
4、Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 CONDITIONING AND TEST CONDITIONING All test values indicated herein are based on material and specimens with moisture content not exceeding 0.2% (test according to ISO R 960, Method B/ASTM D 789). All test materials immedi
5、ately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture content exceeds 0.2%, conditioning 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% rel
6、ative humidity. Individual specimens shall not be removed from closed containers until immediately before testing. 3.4 MOLDING COMPOUND 3.4.1 Melting Point, min 215 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 sha
7、ll be carried out on injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATION WSK-M4D578-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of 4 The following dimensions are required: A. 150 x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B.
8、 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 1.08 - 1.11 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Stre
9、ngth at Yield, min 60 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 3.5.3 1 Elongation at Break, min 15% (test method acc. to 3.5.3) 3.5.4 Flexural Modulus, min 2.0 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm su
10、pport span) 3.5.5 Shear Modulus at 23 C 670 - 1010 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) Additionally, a Shear Modulus vs. Temperature curve shall be plotted fo
11、r -50 to +210 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 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 6 kJ/m2 3.5.
12、6.2 At -40 +/- 2 C 4 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, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature,
13、min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 50 C 3.5.7.2 At 0.45 MPa 150 C ENGINEERING MATERIAL SPECIFICATION WSK-M4D578-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 4 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1
14、000 h at 110 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C) 3.5.8.1 Tensile Strength at max +/- 15% load Change (Test Method per para 3.5.3) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/min The specimen size required for material approv
15、al 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 and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7 - 12-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577
16、, 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 1.3 - 1.8% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05 - 0.2% . After 30 minutes at 120 C 0.05 - 0.2% 5.3 WATER ABSORPTION 1.4 - 1.7% (ISO
17、 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, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 30 kJ/m2 The notched specimens shall be immersed for 4
18、8 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-M4D578-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 4 of 4