1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS Use industry standard C. Mracna, NA 2004 09 21 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.13 & 4 deleted 1994 01 10 Final Release C10365734 B. Hennessey Printed copies are uncontrolled Copyright 2009, Ford Global Tech
2、nologies, LLC Page 1 of 3 RUBBER, ACRYLONITRILE BUTADIENE (NBR), WSD-M2D407-A3 55 IRHD, MINERAL OIL AND OXYGENATED FUEL RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an acrylonitrile butadiene rubber with an IRHD hardness of 55. 2. APPLICATION This sp
3、ecification was released originally for material used as a plenum chamber gasket. The material has good resistance to mineral oil up to 125 C, and moderate resistance to oxygenated fuels including “Flexfuels“. However, the material has poor resistance to “sour gas“ (See Clause 5.2). It is capable of
4、 withstanding average air temperatures up to 80 C and peak temperatures up to 100 C. The material remains flexible down to -30 C. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production
5、 Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING The following tests shall be performed on finished hoses 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 f
6、rom molded test slabs manufactured from the same material with an equivalent cure to the molded parts shall be 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 50 to 60 (ISO 48) 3.5.2 Tensile Strength,
7、min 10.0 MPa (ISO 37, Type 1 Dumb-bell) 3.5.3 Elongation at Break, min 300% (Test method according to para 3.5.2) 3.5.4 Modulus at 100% Elongation, min 1.5 to 3.5 MPa (Test method according to para 3.5.2) 3.5.5 Tear Strength, min 30 kN/m (ISO 34, Method B, procedure a) ENGINEERING MATERIAL SPECIFICA
8、TIONWSD-M2D407-A3Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.6 Compression Set, % max 35% (ISO 815, Sample A except 25% compression, plied-up specimen. 70 h at 125 +/- 2 C) 3.5.7 Ozone Resistance Rating 0 (FLTM BP 101-01) 3.5.8 Brittleness Point -30
9、C (ISO 812, Type B specimen) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) 3.6.1 Hardness Change, max +15 3.6.2 Tensile Strength Change, max -20% 3.6.3 Elongation at Break Change, max -40% 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1,000 h at 80 +/- 2 C) 3.7.1 Hardne
10、ss Change, max +20 3.7.2 Tensile Strength Change, max -35% 3.7.3 Elongation at Break Change, max -65% 3.8 IMMERSION IN OIL No. 1 (ISO 1817, 168 h at 125 +/- 2 C) 3.8.1 Hardness Change, max -10 to +10 3.8.2 Tensile Strength Change, max -20% 3.8.3 Elongation at Break Change, max -50% 3.8.4 Volume Chan
11、ge -10 to +10% 3.9 IMMERSION IN OIL No. 3 (ISO 1817, 168 h at 125 +/- 2 C) 3.9.1 Hardness Change, max -20 to +10 3.9.2 Tensile Strength Change, max -20% 3.9.3 Elongation at Break Change, max -30% 3.9.4 Volume Change, max. -10 to +20% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D407-A3Printed copies are
12、uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.10 IMMERSION IN FUEL C +15% Methanol (ISO 1817, 168 h at 23 +/- 2 C) 3.10.1 Hardness Change, max -25 3.10.2 Tensile Strength Change, max -60% 3.10.3 Elongation at Break Change, max -50% 3.10.4 Volume Change, max +60% 3.11 IMMER
13、SION IN 85% METHANOL +15% FUEL C (ISO 1817, 168 h at 23 +/- 2 C) 3.11.1 Hardness Change, max +/- 15 3.11.2 Tensile Strength Change, max -50% 3.11.3 Elongation at Break Change, max -50% 3.11.4 Volume Change, max +40% 3.12 COMPRESSION STRESS RELAXATION (FLTM BP 116-02 at 25% compression) Measure the i
14、nitial back-force (Fo) after 30 minutes at 23 +/- 2 C. Heat age at 80 +/- 2 C as per para 3.7 and take back-force (Ft) measurements at 23 +/- 2 C after 24, 48, 96, 168 h and thereafter every 168 h until a total elapsed test time of 1,000 h has been completed. Plot Ft against log 10 times in hours. -
15、 Fo F1000/Fo, min 0.35 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 50 to 60 (ISO 868) 5.2 IMMERSION IN OXIDIZED FUEL (SOUR FUEL) (ISO 1817, 336 h at 60 +/- 2 C, PN 90, fuel according to FLTM AZ 105-01) 5.2.1 Hardness Change -30 5.2.2 Tensile Strength Change -85% 5.2.3 Elongation Change -50%
