1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 21 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 15 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13, 3.14 & 4 1995 02 15 Released NE01E10127076156 E. Duda Printed copies are uncontrolled Copyright 2009, Ford Globa
2、l Technologies, LLC Page 1 of 4 HYDROGENATED ACRYLONITRILE WSS-M2D475-A2 BUTADIENE (HNBR) O-RING NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a hydrogenated acrylonitrile butadiene rubber compound with fair resistance to oxygenated and oxidized fuel, good resi
3、stance to fuel, engine oil, ozone and heat aging and excellent resistance to water and coolant. 2. APPLICATION The specification was released originally for material used as a standard part O-ring. This material remains flexible at -40 C when heat aged or saturated with fuel, oil or coolant. 3. REQU
4、IREMENTS 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 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-
5、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 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 Ha
6、rdness, International 60 - 75 (ISO 48/ASTM D 1415) 3.5.2 Hardness, Durometer A 60 - 75 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.3 Tensile Strength, min 15.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.4 Elongation at Break, min 275% (Test Method acco
7、rding to para 3.5.4) 3.5.5 Modulus at 100% Elongation 5.0 - 8.0 MPa (Test Method according to para 3.5.4) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D475-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.5.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Pro
8、cedure A) 3.5.7 Compression Set, max 50% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 168 h at 135 +/- 2 C) 3.5.8 Low Temperature Flexibility, min -40 C (ASTM D 1329, TRIO) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 135 +/- 2 C) 3.6.1 Hardnes
9、s Change 0 to 20 3.6.2 Tensile Strength Change +/- 12% 3.6.3 Elongation at Break Change, max -50% 3.6.4 Modulus at 100% Elongation 6.5 - 12 MPa 3.7 IMMERSION IN FUEL C (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.7.1 Hardness Change, max -25 3.7.2 Tensile Strength Change, max -55% 3.7.3 Elongation Ch
10、ange, max -35% 3.7.4 Volume Change, max +40% 3.7.4.1 Dry Out, Shrinkage, max -15% (24 h at 80 +/- 2 C, Use specimens from 3.7.4) 3.8 IMMERSION IN 85% FUEL C + 15% METHANOL (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.8.1 Hardness Change, max -30 3.8.2 Tensile Strength Change, max -65% 3.8.3 Elongatio
11、n Change, max -38% 3.8.4 Volume Change, max +70% 3.8.4.1 Dry Out, Shrinkage, max -15% (24 h at 80 +/- 2 C Use Specimens from 3.8.4) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D475-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.9 IMMERSION IN OXIDIZED FUEL
12、SOUR GAS) (ISO 1817/ASTM D 471, 70 h at 60 +/- 2 C, PN 90, fuel according to FLTM AZ 105-01) 3.9.1 Hardness Change, max -30 3.9.2 Tensile Strength Change, max -68% 3.9.3 Elongation Change, max -40% 3.9.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself after drying o
13、ut. 3.10 COLD FLEXIBILITY AT -40 C (FLTM BN 102-01, Procedure B, after conditioning in Fuel C for 70 h at 23 +/- 2 C) At the end of the aging period there shall be no signs of cracking, or disintegration when examined under 7X power glass. 3.11 IMMERSION IN OIL IRM 903 (ISO 1817/ASTM D 471, 1000 h a
14、t 135 +/- 2 C) 3.11.1 Hardness Change -12 3.11.2 Tensile Strength Change, max -25% 3.11.3 Elongation Change, max -35% 3.11.4 Volume Change +20% 3.11.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.12 IMMERSION IN CURRENTLY RELEASED ENGINE COOLANT 50/50% V/V MIXT
15、URE WITH DISTILLED WATER, TUBE ONLY (ISO 1817/ASTM D 471, 1000 h at 125 +/- 2 C, see para 5.1) 3.12.1 Hardness Change +12 3.12.2 Tensile Strength Change, max -18% 3.12.3 Elongation Change, max +/- 20% 3.12.4 Volume Change +8% 3.12.5 Visual Evaluation No surface tackiness or cracks when folded flat a
16、gainst itself ENGINEERING MATERIAL SPECIFICATIONWSS-M2D475-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE HNBR
