1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11 & 4 1991 08 16 Revised Para 3.10, updated C10156429 B. Hennessey1991 01 03 Released C10112984 B. HennesseyPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LL
2、C Page 1 of 3 ETHYLENE/ACRYLIC (AEM) RUBBER, WSD-M2D447-A OIL AND ACIDIC AQUEOUS CONDENSATE RESISTANT, 70 HARDNESS 1. SCOPE The material defined by this specification is an ethylene/acrylic rubber with a nominal hardness of 70 IRHD. It is capable of continuous operation at temperatures up to 150 C a
3、nd withstanding peak temperatures up to 175 C. The material remains serviceable at -40 C. 2. APPLICATION The material was released originally for use as grommets and static seals for emission control, vacuum and crankcase ventilation systems where good resistance to ozone and oil containing acidic a
4、queous condensate is required. 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 TESTING The following tests shall be performed on finishe
5、d parts and/or test specimens cut from them. The test specimens shall be die-cut from the finished parts and buffed or slit to the required thickness where necessary. When not feasible, specimens cut from molded test slabs manufactured from the same material with an equivalent state of cure shall be
6、 used. The test slabs shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, International 65 - 75 IRHD (ISO 48/ASTM D 1415) 3.5.2 Hardness, Durometer A (ISO 868/ASTM D 2240, instantaneous, 65 - 75 plied-up specimens. Hand held durometers shal
7、l not be used.) 3.5.3 Tensile Strength, min 10.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.4 Elongation at Break, min 200% (Test Method according to para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Modu
8、lus at 100% Elongation, min 4.0 to 7.5 MPa (Test Method according to para 3.5.3) 3.5.6 Tear Strength, min 30 kN/m (ISO 34, Method b, procedure (a)/ ASTM D 624, Die C) 3.5.7 Brittleness Point, max -40 C (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.5.8 Ozone Resistance Rating 0 (FLTM BP 101-01,
9、 Procedure A) 3.5.9 Compression Set, max 50% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 150 +/- 2 C) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C) 3.6.1 Hardness, International Change, max +15 3.6.2 Tensile Strength Change
10、, max -20% 3.6.3 Elongation at Break Change, max -50% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 175 +/- 2 C) 3.7.1 Hardness, International Change, max +15 3.7.2 Tensile Strength Change
11、, max -20% 3.7.3 Elongation at Break Change, max -50% 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness, International Change -10 to +5 IRHD 3.8.2 Tensile Strength Change, max -
12、40% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.8.3 Elongation at Break Change, max -50% 3.8.4 Volume Change -5 to +15% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself
13、. 3.9 IMMERSION IN OIL No. 3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.9.1 Hardness, International Change -35 to 0 IRHD 3.9.2 Tensile Strength Change, max -60% 3.9.3 Elongation at Break Change, max -50% 3.9.4 Volume Change 0 to +65% 3.9.5 Visual Evaluation No surface tackiness or cracks when fol
14、ded flat against itself. 3.10 IMMERSION IN SYNTHETIC ACIDIC AQUEOUS ENGINE CONDENSATE (ISO 1817/ASTM D 471, 168 h at 90 +/- 2 C. Condensate prepared per FLTM AZ 102-02) 3.10.1 Hardness, International Change, max -10 IRHD 3.10.2 Tensile Strength Change, max -25% 3.10.3 Elongation at Break Change, max -30% 3.10.4 Volume Change, max +10% 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself.
