1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 25 N-STATUS Use industry standard C. Mracna, NA 2004 08 24 Revised Para 3.0 inserted; para 3.4, 3.5 & 4 deleted 1984 08 23 Released CS02-612203-C6 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of
2、2 POLYURETHANE ELASTOMER, INJECTION MOLDED ESA-M2D344-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an injection molded polyurethane elastomer with excellent hydrolytic stability. 2. APPLICATION This specification was released originally for material used in
3、injection molded stabilizer bar link isolators. 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 INJECTION MOLDED TEST SPECIMENS Fully cured test
4、specimens shall be conditioned at 23 +/- 2 C and 50 +/- 5% relative humidity for 24 +/- 0.5 h prior to testing. 3.1.1 Hardness, Durometer A 84 to 92 (ASTM D 2240) 3.1.2 Specific Gravity 1.12 +/- 0.02 (ASTM D 792) 3.1.3 Tensile Properties, min (ASTM D 412, Die C, crosshead speed 500 mm/min) . Modulus
5、 at 100% elongation 6.5 MPa . Modulus at 300% elongation 11.0 MPa . Strength at break 22.0 MPa . Elongation at break 450% 3.1.4 Tensile Set at 100% Strain, max +15% 3.1.5 Compression Set, max 30% 22 h at 70 C (ASTM D 395, Method B) 3.1.6 Tear Strength, min 90 kN/m (ASTM D 624, Die C) ENGINEERING MAT
6、ERIAL SPECIFICATIONESA-M2D344-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.1.7 Ozone Rating, max 0 (FLTM BP 101-01) 3.1.8 Brittleness Temperature -55 C (ASTM D 746) 3.2 HYDROLYTIC STABILITY, MOLDED TEST SPECIMENS Test Method: ASTM D 412, Die C tensile
7、specimens shall be placed in a 118 cm3open top jar which is placed in a 946 cm3screw cap jar containing 150 cm3of distilled water. The screw cap jar is secured and placed in a circulating air oven for 48 +/- 1 h at 82 +/- 1 C. Specimens are removed and conditioned for 24 +/- 0.5 h at 50 +/- 5% relat
8、ive humidity and 23 +/- 2 C. 3.2.1 Tensile Property Change, max . Modulus at 100% elongation +/- 20% . Modulus at 300% elongation +/- 20% . Strength at break +/- 20% . Elongation at break +/- 20% 3.2.2 Hardness Change, Durometer A, max +/- 3 points 3.3 PROPERTIES AFTER AGING, MOLDED TEST SPECIMENS (ASTM D 471, 70 h at 100 C) 3.3.1 Tensile Strength Change, max +/- 20% 3.3.2 Elongation Change, max +/- 25% 3.3.3 Hardness Change, Durometer A, max +/- 3 points
