1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2008 02 06 N-STATUS No replacement named; Inserted 3.0; Deleted 3.3.2, 3.4 CAH2 823385 1975 11 07 Released EF2-11 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 2 POLYETHYLENE, ULTRA HIGH MOLECULAR WEIG
2、HT ESA-M4D369-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an ultra high molecular weight polyethylene. 2. APPLICATION This specification was released originally for materials used in exterior fuel tank protective shields where outstanding impact and excepti
3、onal resistance to abrasion is required. 3. REQUIREMENTS 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). 3.1 RAW MATERIAL To be run on a continuing basis for certifi
4、cation on a daily bass. 3.1.1 Intrinsic Viscosity 100 mL/g (ASTM D 1601; except temperature to be 135 C and concentration 0.03 g/cm3) 3.2 MOLDED MATERIAL (Compression molded sample) 3.2.1 Specific Gravity 0.925 - 0.940 (ASTM D 792) 3.2.2 Tensile Strength, min 4500 psi (31 MPa) (ASTM D 638) 3.2.3 Ten
5、sile Strength at Yield, min 2600 psi (18 MPa) (ASTM D 638) ENGINEERING MATERIAL SPECIFICATIONESA-M4D369-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.2.4 Elongation, Ultimate, min 400% (ASTM D 638) 3.2.5 Impact Strength, Tensile, min 150 ft lb/in2(ASTM
6、 D 1822, Type “S“ specimen) (316 kJ/m2) 3.3 MOLDED PART 3.3.1 Color Natural or as specified on engineering drawing 3.3.3 Specific Gravity 0.925 - 0.940 (ASTM D 792) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 HARDNESS - ROCKWELL “R“, min 40 (ASTM D 785) 5.2 IMPACT STRENGTH, Izod, min 16 ft lb/in (854 J/m) (ASTM D 256, notched)
