1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 13 N-STATUS No Replacement Named C. Mracna, NA 2004 07 14 Revised Para 3.0 inserted; para 3.8, 3.10 & 4 deleted 1972 06 12 Released F6B-143 (Was XF-M2DX43) Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC P
2、age 1 of 2 EPICHLOROHYDRIN RUBBER - FUEL RESISTANT ESF-M2D218-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an epichlorohydrin rubber. 2. APPLICATION This specification was released originally for material used for the retard diaphragm of the distributor adva
3、nce mechanism. 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 ORIGINAL PROPERTIES (SLAB STOCK) Hardness, Durometer “A“ 55 - 65 (ASTM D 2240) Ten
4、sile Strength, min 1,500 psi (ASTM D 412) (10.4 MPa) Elongation, min 400% (ASTM D 412) 3.2 HEAT AGED (ASTM D 865, aluminum block, 70 h at 125 +/- 1 C) Hardness, Durometer “A“ Change 0 to +10 Tensile Strength Change 0 to +30% Elongation Change -60 to 0% 3.3 IMMERSION IN ASTM #3 OIL (ASTM D 471, 70 h
5、at 125 +/- 1 C) Hardness, Durometer “A“ Change 0 to +10 Tensile Strength Change 0 to +25% Elongation Change -50 to 0% Volume Change +/- 10% ENGINEERING MATERIAL SPECIFICATIONESF-M2D218-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.4 IMMERSION IN ASTM R
6、EFERENCE FUEL “A“ (ASTM D 471, 70 h at 23 +/- 2 C) Hardness, Durometer “A“ Change +/- 5 Tensile Strength Change +/- 15% Elongation Change -35 to 0% Volume Change +/- 10% 3.5 IMMERSION IN ASTM REFERENCE FUEL “C“ (ASTM D 471, 70 h at 23 +/- 2 C) Hardness, Durometer “A“ Change -25 to 0 Tensile Strength
7、 Change -30 to 0% Elongation Change -50 to 0% Volume Change 0 to +35% 3.6 COMPRESSION SET, max 25% (ASTM D 395, Method “B“, 22 h at 125 +/- 1 C) 3.7 LOW TEMPERATURE BRITTLENESS Must pass (ASTM D 746, Procedure B, 3 min at -40 C) 3.9 FINISHED PART The following test is to used for diaphragm applicati
8、ons only. Finished parts will be tested for porosity in an approved test fixture such as using compressed air at 8 - 10 psi (55 - 69 kPa). The air will be applied to one side of the diaphragm with no bubbles appearing in 15 s in a water column attached to an evacuation tube on the other side of the diaphragm.
