1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 01 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.8, 3.9 & 4 1994 04 05 Released EP00E10348585000 K. Gerhards Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 5 POLYAMIDE 12 (PA12), RIGID, HIGH HEAT ST
2、ABILIZED WSK-M4D739-A4 MOLDING COMPOUND 1. SCOPE The material defined by this specification is a high heat stabilized extrusion type 12 polyamide molding compound. 2. APPLICATION This specification was released originally for material used for corrugated crankcase vent hoses. 3. REQUIREMENTS 3.0 STA
3、NDARD REQUIREMENTS FOR PRODUCTION MATERIAL 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.
4、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 960, Method B). All test materials immediately after processing have to be sealed in containers that are impermeable to water vapor.
5、 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. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Temperature, min 175 - 185 C (ISO 3146, Method C, 10 C/min heating rate) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specime
6、ns Unless otherwise specified all tests shall be carried out on injection molded 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 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D739-A4 Printed copies a
7、re uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 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 1.00 - 1.03 g/cm3(ISO 1183, Meth
8、od A) (s) 3.5.3 Tensile Strength at Yield, min 45 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed, (s) 3.5.3.1 Elongation at Yield, min 4% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.4 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/
9、min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 495 - 745 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 ti
10、me at each temperature interval - 3 minutes minimum). Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +140 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
11、/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 5 kJ/m23.5.6.2 At -40 +/- 1 C 4 kJ/m2The 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.
12、 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D739-A4 Printed copies are uncontrolled Copyright 2006, 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 45 C 3.5.7.2 At 0.45 MPa
13、 114 C 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 150 +/- 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
14、Tensile Strength at Max Load Change +/- 25% (Test Method per para 3.5.3) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 70 Formation of a clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for mater
15、ial 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 12 - 15-5/ C (ASTM E 228 or TMA, temperatur
16、e range -30 to +30 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D739-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2
17、 C 0.55 - 0.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05 - 0.2% . After 30 min at 120 C 0 - 0.05% 5.3 WATER ABSORPTION 0.1 - 0.3% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 5.4 RECYCLING CODE PA12 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D739-A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
