1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 12 N-STATUS Replaced by WSS-M2D8-B2 C. Mracna, NA 2004 06 23 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.7, 4 & 5.5 deleted 1975 07 01 Released CE3E-EC774588-E2 Was XE-M2D14-A Printed copies are uncontrolled Copyright 2009, Ford G
2、lobal Technologies, LLC Page 1 of 2 SILICONE RUBBER, HIGH TEAR-HIGH TEMPERATURE ESE-M2D8-B NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high temperature and high tear silicone rubber. 2. APPLICATION This specification was released originally for material use
3、d as a molded spark plug insulator for vehicles requiring a high temperature material. 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 MATERIAL T
4、ESTING 3.4.1 Slab Stock (150 x 150 x 1.90 +/- 0.13 mm) Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheet
5、s shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Tensile Strength, min 6.2 MPa (ASTM D 412, Die C) Elongation, min 270% 3.5.2 Hardness, Durometer A 55 - 65 (ASTM D 2240) 3.5.3 Heat Aged (ASTM D 573, 70 h at 230 +/- 2 C) Tensile Strength Change,
6、max -20 % Elongation Change, max -30% Hardness, Durometer A Change -3 to + 10 ENGINEERING MATERIAL SPECIFICATIONESE-M2D8-BPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Immersion in ASTM Oil No. 1 (ASTM D 471, 70 h at 150 +/- 2 C) Tensile Strength Cha
7、nge, max -15% Elongation Change, max -20% Hardness, Durometer A Change -10 to 0 Volume Change, max + 10% 3.5.5 Immersion in Oil IRM 903 (ASTM D 471, 70 h at 150 +/- 2 C) Tensile Strength Change, max -48% Elongation Change, max -40% Hardness, Durometer A Change -30 to 0 Volume Change, max + 50% 3.5.6
8、 Compression Set, max 36% (ASTM D 395, Method B, 70 h at 177 +/- 2 C) 3.5.7 Cold Flexibility No cracking Test Method: After 70 h at -40 C material is bent 180 C over 12.7 mm mandrel. 3.5.8 Tear Strength, min 14 kN/m (ASTM D 624, Die B) 3.5.9 Dielectric Strength, min 20 kV/mm (ASTM D 149, short time)
9、 3.5.10 Ozone Resistance (ASTM D 1171) No checking or cracking after 72 h at 38 +/- 1 C at an ozone concentration of 50 +/- 5 parts per 100 million parts of air. 3.5.11 Color Orange or as specified on engineering drawing 3.6 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing.
