1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS Replaced by WSE-M2D391-A2 C. Mracna, NA 2004 09 15 Revised Para 3.0 inserted; para 3.1,3.2, 3.3, 3.11, 3.12 & 4 deleted 1988 11 30 Released SM/EQ9496 TP M. Siewert Printed copies are uncontrolled Copyright 2009, Ford Global
2、 Technologies, LLC Page 1 of 5 FLUOROELASTOMER (FKM) ROTATING SHAFT OIL SEAL WSK-M2D391-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high heat and oil resistant fluoroelastomer rubber. 2. APPLICATION This specification was released originally for material
3、used for rotating shaft oil seals in engines. 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 All
4、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 1.94 - 2.00 g/cm3(ASTM D 297) 3.4.3 Hardn
5、ess, International 73 - 83 (ASTM D 1415) 3.4.4 Hardness, Durometer A 78 - 88 (ASTM D 2240, instantaneous, plied-up specimen) 3.4.5 Tensile Strength, min 10 MPa (ASTM D 412, Die C) 3.4.6 Elongation at Break, min 150% (Test Method according to para 3.4.5) 3.4.7 Modulus at 50% Elongation 2.5 MPa (Test
6、Method according to para 3.4.5) 3.4.8 Tear Strength, min 20 kN/m (ASTM D 624, Die C) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D391-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 5 3.4.9 Brittleness Point, max -15 C (ASTM D 2137, Method A) 3.4.10 Ozone Resista
7、nce, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 45% (ASTM D 395, Method B, except 25% compression, plied-up Type 1 specimens, 70 h at 150 +/- 2 C) 3.5 Heat Aged (ASTM D 573, 168 h at 150 +/- 2 C) 3.5.1 Hardness Change -1 to +5 3.5.2 Tensile Strength Change -15 to +25% 3.5
8、.3 Elongation Change -30 to +10% 3.5.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.6 Heat Aged (ASTM D 573, 1,000 h at 150 +/- 2 C) 3.6.1 Hardness Change -1 to +7 3.6.2 Tensile Strength Change -15 to +30% 3.6.3 Elongation Change -35 to +10% 3.6.4 Visual Evalua
9、tion No surface tackiness or cracks when folded flat against itself. 3.7 Immersion in ASTM Oil No.1 (ASTM D 471, 168 h at 150 +/- 2 C) 3.7.1 Hardness Change -4 to +4 3.7.2 Tensile Strength Change -15 to +25% 3.7.3 Elongation Change -30 to +15% 3.7.4 Volume Change -3 to +2% 3.7.5 Visual Evaluation No
10、 surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D391-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 5 3.8 Immersion in ASTM Oil No.3 (ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -7 to +2 3.8.2
11、 Tensile Strength Change -30 to +10% 3.8.3 Elongation Change -25 to +25% 3.8.4 Volume Change 0 to +6% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 Immersion in Currently Released Engine Oil (ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) 3.9.1 Hardne
12、ss Change -2 to +6 3.9.2 Tensile Strength Change, max -30 to +15% 3.9.3 Elongation Change, max -50% 3.9.4 Volume Change, max -1 to +5% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 FINISHED PARTS 3.10.1 Hardness 70 - 80 (ASTM D 1415, Micro Tester) Test
13、Method: Prepare and mount specimens according to FLTM BP 106-04. The hardness shall be measured 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 hardne
14、ss shall be measured. The average of three hardness measurements on different specimens shall be taken on each half part and be reported. The original and the changed hardness shall be measured on one and the same part. 3.10.2 Heat Aged (ASTM D 573, 168 h at 150 +/- 2 C) Hardness Change -3 to +5 Vis
15、ual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D391-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 5 3.10.3 Immersion in ASTM Oil No.1 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change
16、-4 to +4 Volume Change -3 to +4% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.4 Immersion in ASTM Oil No.3 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -7 to +2 Volume Change 0 to +8% Test
17、Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.5 Immersion in Currently Released Engine Oil (ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) Hardness Change, max -2 to +6 Volume Change, max -1 to +8%
18、Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.6 Density 1.94 - 2.00 g/cm3(ASTM D 297) 3.10.7 Tensile Permanent Set, max 35% (FLTM BP 116-01, 50% elongation, 22 +/- 2 h at 150 +/- 2 C) % Set = d3-d1 / d2-d1 x 100 d1 = inside diameter, original d2 = inside diam
19、eter, elongated state d3 = inside diameter, after test ENGINEERING MATERIAL SPECIFICATIONWSK-M2D391-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of 5 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requ
20、irements of this specification. 5.1 For information on currently approved service fluids and other materials required for use in this specification contact: Materials Laboratory 13/100 Fluids Materials Section Research and Engineering Centre Engine Oils Ford Motor Company Ltd Engine Engineering Laindon, Basildon Ford Motor Company Essex SS15 6EE, England PO Box 2053 Dearborn, MI 48121, USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia
