1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 05 25 N-STATUS No replacement named C. Mracna, NA 2004 09 24 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13 & 4 1991 03 20 Released C10127030 B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Pa
2、ge 1 of 3 RUBBER, HYDROGENATED NITRILE (HNBR) OXIDIZED WSD-M2D435-A AND OXYGENATED FUEL RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a hydrogenated nitrile rubber compound. 2. APPLICATION This specification was released originally for material used a
3、s an in-tank fuel pump insulator and mounting. The material has good resistance to oxygenated and oxidized fuels and ozone. It remains flexible at -40 C when fuel saturated. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the C
4、ompanys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens All tests shall be carried out on finished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to
5、 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 Hardness, International 55 - 65 (ISO 48/ASTM D 1415) 3.5.2 Tensile Strength, min 14.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.3 Elongation at Break, min 300
6、% (Test method according to 3.5.4) 3.5.4 Modulus at 100% Elongation 1.0 to 3.0 MPa (Test method according to 3.5.4) 3.5.5 Compression Set, max 65% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 100 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D435-A Printed co
7、pies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C) 3.6.1 Hardness Change, max +5 3.6.2 Tensile Strength Change, max -10% 3.6.3 Elongation Change, max -25% 3.6.4 Visual Evaluation No surfac
8、e tackiness or cracks when folded flat against itself. 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 -70% 3.7.3 Elongation Change, max -30% 3.7.4 Volume Change, max +35% 3.7.4.1 Dry Out, Shrinkage, max -15% (24 h a
9、t 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 -70% 3.8.3 Elongation Change, max -30% 3.8.4 Volume Change, max +60% 3.8.4.1 Dry Out, Shrinkage, max -15% (24
10、h at 80 +/- 2 C, use specimens from 3.8.4) 3.9 IMMERSION IN OXIDIZED FUEL (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 -75% 3.9.3 Elongation Change, max -30% 3.9.4 Visual Evaluation No
11、surface tackiness or cracks when folded flat against itself after drying out. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D435-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 3 3.10 COLD FLEXIBILITY AT -40 C (FLTM BN 102-01, Procedure B, after conditioning in Fu
12、el 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 OZONE RESISTANCE, max (FLTM BP 101-01) 3.11.1 After Conditioning in Fuel C +15% Methanol Rating 1 Completely immerse suitable lengths of materia
13、l in 85% Fuel C +15% Methanol for 48 h at 23 +/- 2 C after which they are dried by suspending vertically in a well ventilated area for an additional 48 h at 23 +/- 2 C. 3.12 CRYSTALLINE COPPER SALT FORMATION No crystal formation on the rubber or copper strip. No copper tarnish Test Method: ASTM D 13
14、0 (Automotive Gasoline Method), except use 150 mL Fuel C +15% Methanol in a 200 mL test tube. Mount 75 x 12.5 x 2 mm rubber sample parallel but held 10 mm away from the copper strip. Age for 168 h at 23 +/- 2 C. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Density TBE (ISO 1183, METHOD A/ASTM D 297) 5.2 Hardness, Durometer A 55 - 65 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen)
