1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 07 N-STATUS No replacement named J. Crist, NA 2005 08 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1987 01 13 Released SS1-6000-185 L. A. Graham, M.P., B.M.M. Printed copies are uncontrolled Copyright 2010, Ford Global
2、Technologies, LLC Page 1 of 2 ETHYLENE VINYL ACETATE COPOLYMER ESB-M4D524-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an ethylene vinyl acetate copolymer thermoplastic molding compound. 2. APPLICATION This specification was released originally for material
3、used as a bumper energy absorber for front and rear bumper systems. 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). 3.4 MOLDING COMPOUND 3.4.1 Melt F
4、low Rate See Corporate (ASTM D 1238, 190 C, 2.16 kg) Approved Source List 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens All test specimens shall be compression molded in accordance with ASTM D 1928, Procedure C. The values of this specification are based on compression molded specimen
5、s unless otherwise specified. 3.5.2 Hardness, Durometer D 37 - 47 (ASTM D 2240, instantaneous reading) 3.5.3 Specific Gravity 0.880 - 0.960 (ASTM D 792) 3.5.4 Tensile Strength at Break, min 15.5 MPa (ASTM D 638, type IV specimen, 3.2 mm thick, 50 mm/min test speed) Elongation, min 600% 3.5.5 Flexura
6、l Modulus, min 80 MPa (ASTM D 790, 3.2 x 25 x 100 mm specimen) 3.5.6 Vicat Softening Point, min 74 C (ASTM D 1525) ENGINEERING MATERIAL SPECIFICATIONESB-M4D524-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 3.5.7 Impact Strength, Izod (ASTM D 256, 3.2 mm
7、specimen thickness) At 23 C No break At -40 C No break 5. GENERAL INFORMATION The information given below is provided for assistance and clarification in meeting the requirements of this specification. 5.1 MOLD SHRINKAGE 0.010 - 0.020 (ASTM D 955, after 48 h, compression molded sample) 5.2 COEFFICIENT OF LINEAR THERMAL EXPANSION 13 x 10-5/C (ASTM D 696)
