1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 22 Activated G. Kowalski Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 5 POLYAMIDE 66 (PA66), HEAT STABILIZED 40% GLASS WSS-M4D823-A2 FIBER/MINERAL REINFORCED MOLDING COMPOUND 1. SCOPE The mate
2、rial defined by this specification is a heat stabilized 25% glass fiber and 15% mineral reinforced polyamide 66 molding compound. 2. APPLICATION This specification was released originally for material used for engine valve covers. NOTICE: This material absorbs and retains moisture. Part design and t
3、olerances 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. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MA
4、TERIALS 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 using latest ISO test methods. 3.1.2
5、This specification is based on virgin material only. The use of in-house regrind is not allowed unless the part is validated during PV testing with the documented level of regrind noted on the part drawing. NOTE: Statistical data shall be derived from testing a minimum of 30 lots. The statistical da
6、ta shall be submitted with initial characterization data. For provisional approval prior to completion of 30 lot testing statistical data shall be derived from testing of 30 evenly divided subgroups from a minimum of 3 lots. These data shall be included with the specification draft when requesting a
7、 new specification. After completion of 30 lot testing, specification values may be revised to reflect the final results. For materials used in applications requiring small amounts (less than 3 lots) the above requirement may be waived at the option of the affected Product Development Materials Acti
8、vity. 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. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D823-A2 Printed copies are uncontrolled Copyright 2006, Ford Global
9、 Technologies, LLC Page 2 of 5 3.2 MOLDING COMPOUND 3.2.1 Glass Fiber/Mineral Content 38 - 42% (ISO 3451/4, test temperature 600 +/- 25 C, test portion 1 g) 3.2.2 Melt Temperature 258 - 263 C (ISO 1218, Method B/ASTM D 789, or DSC - ASTM E 794) 3.3 MOLDED TEST SPECIMEN 3.3.1 Preparation of Test Spec
10、imens 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 Specimens with shorter dimensions shall be cut from the cente
11、r portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.3.2 Density 1.42 - 1.55 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.3.3 Tensile Strength at Max Load, min 140 MPa (ISO R 527/ASTM D 638M, 150 x 10 x 4.0 +/-0.2mm specimen, 5
12、 mm/minute test speed) 3.3.4 Tensile Stress/Strain Curves (ISO 527-1, 527-2, ISO 11403-1; 150 x 10 x 4 mm specimen A). Test speed shall be 5 mm/minute for all materials. 3.3.5 Flexural Modulus, min 7 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support sp
13、an) 3.3.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens for each test) 3.3.6.1 At 23 +/- 2 C 6.0 kJ/m2ENGINEERING MATERIAL SPECIFICATIONWSS-M4D823-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Pag
14、e 3 of 5 3.3.6.2 At -40 +/- 2 C 6.0 kJ/m2The test specimens must be conditioned for minimum f 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. 3.3.7 Heat Deflection
15、Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.3.7.1 At 1.82 MPa 215 C 3.3.7.2 At 0.45 MPa 244 C 3.3.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3
16、- 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.8.1 Tensile Strength, Change +/- 25% (Test Method per para 3.5.3) 3.3.8.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat agin
17、g) 3.4 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. 3.5 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 Formation of cle
18、ar film, droplets or crystals is cause for rejection. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D823-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 4. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the req
19、uirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM D 696) 4.1.1 Flow 3.0 3.1-05/C 4.1.2 Cross Flow 3.7 4.1-05/C NOTE: The originator of the specification shall report temperature range of the measurement. Range of -30 to +30 C is commonly used for majority of thermopl
20、astics. Report both the flow and cross-flow direction. 4.2 MOLD SHRINKAGE (ISO 294-3 and 294-4, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen B) 4.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C Flow 0.31 0.33% Cross Flow 0.64 0.72% 4.2.2 Post Shrinkage (Separate specimens required for each te
21、st) . After 48 h at 80 C Flow 0.00 0.02% Cross Flow 0.01 0.03% . After 30 minutes at 120 C Flow 0.02 0.03% Cross Flow 0.00 0.01% NOTE: Report both the flow and cross-flow direction. 4.3 WATER ABSORPTION 1.7 1.8% (ISO 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 4.4 RECYCLING CODE PA66 (GF+M) 40 ENGINEERING MATERIAL SPECIFICATIONWSS-M4D823-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5 -20 oC 0 oC 23 oC 40 oC 60 oC 80 oC 100 oC 120 oC 140 oC
