1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 09 Revised Para 3.0 inserted; para 3.3, 3.4, 3.5 RD-226290-C41979 09 18 Rel.-A/1982 04 14, CAL2-892-384-C3, Rel.-B; CAJ2-990061-C2 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 POLYURETHANE E
2、LASTOMER ESA-M2D287-A ESA-M2D287-B ESA-M2D287-C ESA-M2D287-D 1. SCOPE The materials defined by these specifications are medium hard polyurethane elastomers. 2. APPLICATION These specifications were released originally for material used as an insulator in transmission throttle valve rods and rebound
3、stop on shock absorbers. 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 MOLDED TEST SPECIMENS 287-A 287-B 287-C 287-D 3.1.1 Original Properties
4、Tensile Strength, 40 27 40 40 MPa, min (ASTM D 412, 508 mm/min test speed) Elongation, % min 500 450 500 450 Modulus at 100% 10 8 8 9 Elongation, MPa, min Modulus at 300% 15 12 12 15 Elongation, MPa, min Tear Strength, 80 50 96 100 kN/m, min (ASTM D 624, Die C) Hardness, Durometer A 92 +/- 5 92 +/-
5、5 90 +/- 4 94 +/- 4 (ASTM D 2240) ENGINEERING MATERIAL SPECIFICATIONESA-M2D287-A/B/C/DPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 287-A 287-B 287-C 287-D Specific Gravity, +/- 0.02 1.15 1.13 1.16 1.19 (ASTM D 792) 3.1.2 Oven Aged 100 C 100 C 150 C 150 C
6、ASTM D 573, 70 h at *) Tensile Strength +/- 25 +/- 25 +/- 15 +/- 20 Change, % Elongation Change, % +/- 10 +/- 15 +/- 15 +/- 15 Hardness Change +/- 3 +/- 3 +/- 3 +/- 3 3.1.3 Immersion in ASTM Oil #1 100 C 100 C 125 C 125 C (ASTM D 471, 70 h at *) Tensile Strength +/- 20 +/- 30 +/- 40 +/- 30 Change,
7、 Elongation Change, % +/- 15 +/- 10 +/- 20 +/- 15 Hardness Change +/- 5 +/- 5 +/- 5 +/- 5 Volume Change, % +/- 3 +/- 3 +/- 3 +/- 3 3.1.4 Immersion in ASTM Oil #3 100 C 100 C 125 C 125 C (ASTM D 471, 70 h at *) Tensile Strength +/- 55 +/- 55 +/- 55 +/- 55 Change, % Elongation Change, % +/- 15 +/- 15
8、 +/- 40 +/- 15 Hardness Change +/- 3 +/- 5 +/- 7 +/- 5 Volume Change, % +/- 15 +/- 20 +/- 20 +/- 15 *Temperature Tolerance +/- 2 C 3.1.5 Ozone Rating 0 0 0 0 (FLTM BP 101-01) ENGINEERING MATERIAL SPECIFICATIONESA-M2D287-A/B/C/DPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies,
9、 LLC Page 3 of 3 287-A 287-B 287-C 287-D 3.1.6 Compression Set, % max 45.0 45.0 40.0 45.0 (ASTM D 395, Method B, 22 h at 70 +/- 1 C; 100 +/- 2 C for C & D Suffix) 3.1.7 Brittleness Point, C, max -40 -40 -40 -40 (ASTM D 2137, Method A) 3.2 MOLDED PARTS 3.2.1 Specific Gravity +/- 0.02 1.15 1.13 1.16 1.19 (ASTM D 792) 3.2.2 Hardness, 92 +/- 5 92 +/- 5 90 +/- 4 94 +/- 4 Durometer A (ASTM D 2240)
