1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 28 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 09 21 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.12, 3.13 & 4 1990 02 01 Released C 01031532 M. Siewert Printed copies are uncontrolled Copyright 2009, Ford Global T
2、echnologies, LLC Page 1 of 5 NITRILE BUTADIENE (NBR) RUBBER WSK-M2D426-A ROTATING SHAFT OIL SEAL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a nitrile butadiene rubber compound. 2. APPLICATION This specification was released originally for material used for r
3、otating shaft oil seals in manual transmissions. 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 SLAB STOCK 3.4.1 Preparation of Test Specimens A
4、ll tests are to be performed on specimens die-cut from the molded test sheets manufactured from the same material and with equivalent cure to production parts. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.4.2 Density 1.42 - 1.46 g/cm3(ISO 1183, Method A/A
5、STM D 297) 3.4.3 Hardness, International 70 - 80 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Durometer A 70 - 80 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.4.5 Tensile Strength, min 9.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elongation at Break, min 400%
6、 (Test Method according to para 3.4.5) 3.4.7 Modulus at 100% Elongation 4.0 - 8.0 MPa (Test Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D426-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 5 3.4.8 Tear Strength, min 18 kN/m (ISO 34
7、 Method B, procedure a/ ASTM D 624, Die C) 3.4.9 Brittleness Point, max -19 C (ISO 812, Type B specimen/ASTM D 2137, Method A) 3.4.10 Ozone Resistance, max Rating 2 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 50% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up Type 1 s
8、pecimens, 22 h at 100 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) 3.5.1 Hardness Change 0 to +10 3.5.2 Tensile Strength Change, max +40% 3.5.3 Elongation Change, max -40% 3.5.4 Visual Evaluation No surface tackiness or cracks when folded flat against i
9、tself. 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 100 +/- 2 C) 3.6.1 Hardness Change +6 to +18 3.6.2 Tensile Strength Change, max +50% 3.6.3 Elongation Change, max -85% 3.7 IMMERSION IN OIL No.1 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) 3.7.1 Hardness Change -6 to +12
10、3.7.2 Tensile Strength Change, max +40% 3.7.3 Elongation Change, max -40% 3.7.4 Volume Change -10 to +2% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D426-APrinted copies are uncontrolled Copyright 2009, Ford Global T
11、echnologies, LLC Page 3 of 5 3.8 IMMERSION IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) 3.8.1 Hardness Change -10 to 0 3.8.2 Tensile Strength Change, max +30% 3.8.3 Elongation Change, max -45% 3.8.4 Volume Change +4 to +20% 3.8.5 Visual Evaluation No surface tackiness or cracks when folde
12、d flat against itself. 3.9 IMMERSION IN APPROVED TRANSMISSION FLUID OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1,000 h at 100 +/- 2 C, see para 5.1) 3.9.1 Hardness Change -10 to +2 3.9.2 Tensile Strength Change, max +30% 3.9.3 Elongation Change, max -40% 3.9.3 Volume Change +2 to +7% 3.9.4 Visual
13、Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 ASH CONTENT 46.1 - 52.1% (ASTM D 297 or TGA) 3.11 FINISHED PARTS 3.11.1 Hardness 70 - 80 (ISO 48, micro/ASTM D 1415, micro) Test Method: Prepare and mount specimens according to FLTM BP 106-04. The hardness shall be meas
14、ured between sealing lip edge and spring groove. For each aging test 3 seals are to be cut into two equal parts in an axial direction, one half part shall be aged and on the other half part the original hardness shall be measured. The average of three hardness measurements on different specimens sha
15、ll be taken on each half part and be reported. The original and the changed hardness shall be measured on one and the same part. 3.11.2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) Hardness Change +2 to +12 Visual Evaluation No surface tackiness or cracks when folde
16、d flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D426-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 5 3.11.3 Immersion in Oil No.1 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) Hardness Change +2 to +12 Volume Change -10 to +3% Test Method: 0.5
17、g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.4 Immersion in Oil No.3 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) Hardness Change -12 to -2 Volume Change +10 to +20% Test Method: 0.5 g minimum weight, multiple spe
18、cimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.5 Immersion in Approved Transmission Fluid of Affected Model Year (ISO 1817/ASTM D 471, 1,000 h at 100 +/- 2 C, see para 5.1) Hardness Change -6 to +5 Volume Change +3 to +10% Test Method: 0.5 g mi
19、nimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.6 Density 1.42 - 1.46 g/cm3(ISO 1183, Method A/ASTM D 297) 3.11.7 Ash Content 46.1 - 52.1% (ASTM D 297 or TGA) 3.11.8 Tensile Permanent Set, max 40% (FLTM BP 116-01, 50% e
20、longation, 22 +/- 2 h at 70 +/- 2 C) % Set = d3-d1 / d2-d1 x 100 d1 = inside diameter, original d2 = inside diameter, elongated state d3 = inside diameter, after test ENGINEERING MATERIAL SPECIFICATIONWSK-M2D426-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of
21、 5 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 For information on currently approved service fluids and other materials required for use in this specification contact: Materials Laboratory GB-13/100
22、Transmission & Axle Engineering Car Engineering Materials & Fasteners Engineering Ford Motor Co. Ltd. Ford Motor Company Research & Engineering Centre PO Box 2097 Laindon, Basildon Bin 29B Essex SS15 6EE Livonia, MI 48151 England USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214 Australia
