1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 25 N-STATUS Use industry standard C. Mracna, NA 2004 08 18 Revised Para 3.0 inserted; para 3.4, 3.5 & 4 deleted 1982 04 16 Released PCR 952112-C Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 1
2、RUBBER, NATURAL/BROMOBUTYL BLEND - ESA-M2D320-A ENERGY ABSORBING NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a blend of natural and bromobutyl rubber for use where resistance to heat, high damping factor and low temperature flexibility are required. It is per
3、missible to use SBR as a processing aid provided prior Engineering approval is obtained. 2. APPLICATION This specification was released originally for material used for the steering gear mounting insulators where energy absorbing properties at typical vehicle frequencies are needed. 3. REQUIREMENTS
4、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 SLAB STOCK (ASTM D 3182) 3.1.1 Tensile Strength, min 1,800 psi (ASTM D 412, Die C) (12.4 MPa) 3.1.2 Elongation, m
5、in 400% (ASTM D 412, Die C) 3.1.3 Hardness, Durometer “A“ 53 +/- 5 (ASTM D 2240, plied specimen) 3.1.4 Compression Set, max 40% (ASTM D 395, Method “B“, 22 h at 70 C) 3.1.5 Ozone Rating 0 (FLTM BP 101-01) 3.1.6 Cold Flexibility at -40 C Pass (ASTM D 746, Method “B“) 3.2 HEAT AGED (ASTM D 573, 70 h at 70 C) 3.2.1 Tensile Strength Change, max -25% 3.2.2 Elongation Change, max -25% 3.2.3 Hardness Change 0 to +10 3.3 Elastomer must conform to ESA-M9P7A, “Elastomeric Parts, Minimum Qualification and Acceptance Test Requirements“.
