1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 28 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 09 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11, 3.12 & 4 1998 01 26 Activated B. Hennessey Printed copies are uncontrolled Copyright 2009, Ford Global Technolog
2、ies, LLC Page 1 of 3 ETHYLENE/ACRYLIC (AEM) RUBBER OIL AND ACIDIC WSD-M2D447-A2 AQUEOUS CONDENSATE RESISTANT, 80 HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an ethylene/acrylic rubber with a nominal hardness of 80 IRHD. It is capable of continuous op
3、eration at temperatures up to 150 C and withstanding peak temperatures up to 175 C. The material remains serviceable at 40 C. 2. APPLICATION This specification was originally released for grommets and static seals for emission control, vacuum and crankcase ventilation system where good resistance to
4、 ozone and oil containing acidic aqueous 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 t
5、est shall be performed on finished 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, specimen cut from molded test slabs manufactured from the same material and with
6、equivalent cure to molded parts are recommended. 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 75 - 85 (ISO 48) 3.5.2 Tensile Strength, min 10.0 MPa (ISO 37, Die C) 3.5.3 Elongation at Break, min 150% (Tes
7、t Method according to para 3.4.2) 3.5.4 Modulus at 100% Elongation, min 7.5 to 11.0 MPa (Test Method according to para 3.4.2) 3.5.5 Tear Strength, N/cm, min 10 30 kN/m (ISO 34, Method B, Procedure (a) ASTM D 624, Die B) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-A2Printed copies are uncontrolled C
8、opyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.6 Brittleness Point, max -40 C (ISO 812, Type B specimen) 3.5.7 Ozone Resistance, max Rating max 0 (FLTM BP 101-01, Method B) 3.5.8 Compression Set, %, max 40 50% (ISO 815 Method B except 25% compression, plied-up specimens, 70 h at 150 C
9、+/- 2 C) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2C) 3.6.1 Hardness, International Change, max +15 3.6.2 Tensile Strength Change, %, 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
10、. 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 175 +/- 2C) 3.7.1 Hardness, International Change, max +15 3.7.2 Tensile Strength Change, %, 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 IM
11、MERSION IN OIL No.1 (ISO 1817, 168 h at 150 +/- 2 C) 3.8.1 Hardness, International Change -10 to +5 IRHD 3.8.2 Tensile Strength, %, max -40% 3.8.3 Elongation at Break Change, %, max -50% 3.8.4 Volume Change, %, max -5 to +15% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat ag
12、ainst itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.9 IMMERSION OIL No. IRM 903 (ISO 1817, 168 h at 150 +/- 2 C) 3.9.1 Hardness, International Change -35 to 0 IRHD 3.9.2 Tensile Strength, %, max -60%
13、 3.9.3 Elongation at Break Change, %, max -50% 3.9.4 Volume Change, %, max 0 to +65% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN SYNTHETIC ACIDIC AQUEOUS ENGINE CONDENSATE (ISO 1817, 168 h at 90 +/- 2 C. Condensate prepared per FLTM AZ 10
14、2-02) 3.10.1 Hardness, International Change -10 IRHD 3.10.2 Tensile Strength, %, 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. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Hardness, Durometer A 75 - 85 (ISO 868, instantaneous plied-up specimens. Hand held durometers shall not be used)
