1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 04 28 N-STATUS Replaced by WSK-M4D653-A A. Reaume/M. Masserant 2005 09 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1989 05 19 Released SM/EQ9548 TP M. Siewert Printed copies are uncontrolled Copyright 2006, Ford Global Te
2、chnologies, LLC Page 1 of 4 POLYAMIDE (PA) 66, HEAT STABILIZED WSK-M4D641-A 25% GLASS FIBER REINFORCED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a glass fiber reinforced, heat stabilized polyamide 66 molding compound. 2. APPLICATION This specification was r
3、eleased originally for material used for cages of ball bearings. 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
4、Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1
5、 Glass Fiber Content 22.5 - 27.5% (ISO 3451/4, test temperature 600 +/-25 C, test portion 1 g) 3.4.2 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
6、 one-end gated test specimens. 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 specimens shall be prepared accordin
7、g to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D641-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 3.5.2 Density 1.26 - 1.35 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 150 MPa (ISO
8、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 6.5 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 1.36 - 2.27 GPa (ASTM D 4065, forced constant amplitude, f
9、ixed 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 for -50 to +240 C temperature range, at 5 C minimum intervals. The plotted curve must be within to
10、lerance 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 7 kJ/m23.5.6.2 At -40 +/- 2 C 6 kJ/m2The test specimens must be conditioned for minimum of 6 h at the above s
11、pecified 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, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 230 C 3.5.7.2 At 0.
12、45 MPa 250 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 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 determination) 3.5.8.1 Impact Strength, I
13、zod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D641-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen
14、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 and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.5 - 3.4-5/C (ASTM
15、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 0.2 - 1.5% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.01 - 0.05% After 30 minutes at 120 C 0.01 - 0.09% 5.3 W
16、ATER ABSORPTION 0.8 - 1.1% (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, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens minimum) 5.4.1 After Moisture Conditioning 14 kJ/m2The notched spe
17、cimens 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 SPECIFICATIONWSK-M4D641-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4
