1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 10 25 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.7, 3.8 & 4 1989 07 03 Released SM/EQ24042 M. Siewert Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 4 POLYAMIDE (PA) 66, HEAT STABILIZED 20% GLASS WS
2、K-M4D653-A FIBER REINFORCED 1. SCOPE The material defined by this specification is a glass fiber reinforced, heat stabilized polyamide 66 molding compound. 2. APPLICATION This specification was released originally for material used for the knob carburetor choke control. 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 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must
4、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 and specimens with moisture content not exceeding 0.2% (test according to ISO R 960, Method B/ASTM D 789). All test mat
5、erials immediately after processing have to be sealed in containers that are impermeable to water vapor. If the moisture content 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 +
6、/- 5% relative humidity. Individual specimens shall not be removed from closed containers until immediately before testing. 3.4 MOLDING COMPOUND 3.4.1 Glass Fiber Content 17.5 - 22.5% (ISO 3451/4, test temperature 600 +/- 25 C, test portion 1 g) 3.4.2 Melt Temperature 250 - 265 C (ISO 1218, Method B
7、/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 SPECIFICATIONWSK-M4D653-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologie
8、s, 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 specimens shall be prepared according to ISO 294
9、. No annealing allowed. 3.5.2 Density 1.26 - 1.31 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 125 MPa (ISO 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 5.8 GPa (ISO 178/ASTM D 790M, Method I, Pr
10、ocedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.2 - 2.0 GPa (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 S
11、hear 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 x 10 x 4.0 +/- 0.2 mm specimen, 10 speci
12、mens for each test) 3.5.6.1 At 23 +/- 2 C 5.5 kJ/m 3.5.6.2 At -40 +/- 2 C 4.5 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, if not possible, test can be conducted outs
13、ide, 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 0.45 MPa 250 C ENGINEERING MATERIAL SPECIFICATIONWSK-M4D653-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3
14、of 4 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, Izod Ch
15、ange +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 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 below is provid
16、ed 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 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
17、 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 WATER 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
18、 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 12 kJ/m 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 SPECIFICATIONWSK-M4D653-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 4 of 4
