1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2008 02 06 N-STATUS Replaced by WSS-M4D955-A; Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 aluminum foil, 180 - 200 C molding temperature, 15 +/- 2 C/min cooling rate. The values of this specification are based on unannealed specimens. ENGINE
2、ERING MATERIAL SPECIFICATIONESA-M4D197-A3 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.2 Density 0.944 - 0.952 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.2.1 Density on Finished Parts 0.941 - 0.950 g/cm3(Test according to 3.5.2) 3.5.3 Tensile
3、 Strength at Yield, min 22 MPa (ISO R 527, type 2/ASTM D 638, Type IV specimens, 50 mm/min test speed) 3.5.3.1 Elongation at Yield, min 600% (Test according to 3.5.3) 3.5.4 Impact Strength, Falling Dart At -29 C No cracking or penetration, slight ductile tear (6.4 mm, max) allowed Test Method: A Gar
4、dner impact tester model 1G-1120 shall be used except that the tester shall be modified so that the impact head (12.7 mm diameter) and base (51 mm diameter) shall conform to FLTM BO 117-02. A 11.3 J impact shall be used. Test specimens shall be 100 x 100 x 2.0 +/- 0.1 mm in size. Specimens shall be
5、conditioned at the specified temperature for 24 h min. Samples must be impacted within 5 s after removal from the cold chamber. A minimum of 10 tests is required. 3.5.5 Brittleness Temperature, max -60 C (ISO R 812/ASTM D 746, Procedure B) 3.5.6 Environmental Stress Crack Resistance, min 400 h (ASTM
6、 D 1693, F50, Condition A) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. When this material is used for manufacturing of fuel tanks, the inner surface must be treated to produce a hydrocarbon permeation resistant barrier for the reduction of evaporative emissions. The barrier may be produced by the fluorination or the sulfonation process.
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