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, 3.10, 3.11 Corrected numbering 3.8 1998 01 26 Activated B. Hennessey Printed copies are uncontrolled Copyright 2009, F
2、ord Global Technologies, LLC Page 1 of 3 ETHYLENE/VINYL ACETATE RUBBER HEAT AND OIL WSD-M2D447-A4 RESISTANT, 50 HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an ethylene/vinyl acetate rubber with a nominal hardness of 50 IRHD. It is capable of continuo
3、us operation at temperatures up to 130 C and withstand peak temperatures up to 150 C. The material is also capable of operating in engine oils up to 150 C. 2. APPLICATION This specification was originally released for material used as a cylinder head cover gasket on the Sigma engine. 3. REQUIREMENTS
4、 Material specification requirements are to be used for initial qualification of materials. 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
5、following tests shall be performed on finished belts and/or test specimens cut from them. The test specimens shall be die-cut from 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
6、with an equivalent state of cure shall be used. The test sheets 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 45 - 55 IRHD (ISO 48) 3.5.2 Tensile Strength, min 10.0 MPa (ISO 37, Die C) 3.5.3 Elongation at Break, min 200%
7、 (Test Method according to para 3.6.3) 3.5.4 Modulus at 100% Elongation, min 2.0 to 5.5 MPa (Test Method according to para 3.6.3) 3.5.5 Brittleness Point, max -40 C (ISO 812, Type B specimen) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-A4Printed copies are uncontrolled Copyright 2009, Ford Global T
8、echnologies, LLC Page 2 of 3 3.5.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.7 Compression Set, %, max 35% (ISO 815 Method B except 25% compression, plied-up specimens, 70 h at 150 C +/- 2 C) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1,000 h at 130 +/- 2 C) 3.6.1 Hardn
9、ess Change, max +10 3.6.2 Tensile Strength Change, max -20% 3.6.3 Elongation at Break Change, max -25% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 140 +/- 2 C) 3.7.1 Hardness Change, max +10 3.7.2
10、Tensile Strength Change, max -25% 3.7.3 Elongation at Break Change, max -25% 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL No.1 (ISO 1817, 168 h at 140 +/- 2 C) 3.8.1 Hardness Change, max +/- 5 IRHD 3.8.2 Tensile Strength Change, max -20
11、% 3.8.3 Elongation at Break Change, max -25% 3.8.4 Volume Change, max -10 to +10% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D447-A4Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page
12、3 of 3 3.9 IMMERSION IN OIL IRM 903 (ISO 1817, 168 h at 140 +/- 2 C) 3.9.1 Hardness Change, max -25 IRHD 3.9.2 Tensile Strength Change, max -60% 3.9.3 Elongation at Break Change, max -60% 3.9.4 Volume Change, max 0 to +65% 3.9.4 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 45 - 55 (ISO 868, instantaneous)
