1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 26 N-STATUS Use industry standard C. Mracna, NA 2004 09 13 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.6 & 4 deleted 1987 10 01 Released NEO1E10000474000 E. J. Duda Printed copies are uncontrolled Copyright 2009, Ford Global Techn
2、ologies, LLC Page 1 of 3 POLYACRYLATE (ACM) RUBBER, GROMMET WSE-M2D370-A LONG LIFE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a long life, high heat and oil resistant polyacrylate (ACM) rubber. 2. APPLICATION This specification was released originally for ma
3、terial used for emission valve grommets where long life, high heat and oil resistance are major requirements. 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-M99P
4、1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens 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
5、 test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.4.2 Density 1.25 - 1.35 g/cm3(ASTM D 297) 3.4.3 Hardness, International 55 - 65 (ASTM D 1415) 3.4.4 Hardness, Durometer A 54 - 64 (ASTM D 2240, instantaneous, plied-up specimen) 3.4.5 Tensile Strength, min 7.0 MPa
6、 (ASTM D 412, Die C) 3.4.6 Elongation at Break, min 150% (Test Method according to para 3.4.5) 3.4.7 Modulus at 100% Elongation 2.8 - 5.5 MPa (Test Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D370-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies,
7、LLC Page 2 of 3 3.4.8 Brittleness Point, max -30 C (ASTM D 2137, Method A, except 2.0 +/- 0.2 mm specimen thickness, 5 h exposure) Original specimen Pass After 168 h Heat Aging Pass according to 3.4.11 3.4.9 Ozone Resistance, max Rating 0 (FLTM BP 101-01) 3.4.10 Compression Set, max 38% (ASTM D 395,
8、 Method B, except 25% compression, plied-up specimens, 22 h at 175 +/- 2 C) 3.4.11 Heat Aged (ASTM D 573, 168 h at 150 +/- 2 C) Hardness Change, max +15 Tensile Strength Change, max -6% Elongation Change, max -32% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.
9、12 Heat Aged (ASTM D 573, 1,000 h at 150 +/- 2 C) Hardness Change, max +24 Tensile Strength Change, max -25 Elongation Change, max -55 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.13 Immersion in ASTM Oil No.1 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness Chang
10、e, max +12 Tensile Strength Change, max -15% Elongation Change, max -45% Volume Change +/- 3% ENGINEERING MATERIAL SPECIFICATIONWSE-M2D370-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 Visual Evaluation No surface tackiness or cracks when folded flat agai
11、nst itself. 3.4.14 Immersion in ASTM oil No.3 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change, max -20% Tensile Strength Change, max -25% Elongation Change, max -20% Volume Change 0 to +25% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.5 FINISHED PART 3.5.1 H
12、ardness International 48 - 58 (Test according to 3.4.4) 3.5.2 Hardness, Durometer A 52 - 62 (Test according to 3.4.3) 3.5.3 Heat Aged according to 3.4.11 Hardness Change +18 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.5.4 Immersion in ASTM Oil No. 1 Aged accor
13、ding to 3.4.13 Hardness Change +12 Volume Change +/- 3% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.5.5 Immersion in ASTM Oil No. 3 Aged according to 3.4.14 Hardness Change -10 Volume Change 0 to +25% Visual Evaluation No surface tackiness or cracks when folded flat against itself.
