1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 28 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 09 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13, 3.14 Corrected numbering 3.9 1990 02 01 Released C01031532 M. Siewert Printed copies are uncontrolled Copyright
2、2009, Ford Global Technologies, LLC Page 1 of 5 POLYACRYLIC (ACM) RUBBER, ROTATING SHAFT WSK-M2D425-A OIL SEAL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyacrylic rubber compound. 2. APPLICATION This specification was released originally for material us
3、ed for rotating shaft oil seals in manual transmissions and rear axles. 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 Preparat
4、ion of Test Specimens All 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 1.35 - 1.39 g/c
5、m3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 64 - 78 (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 6.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elonga
6、tion at Break, min 150% (Test Method according to para 3.4.5) 3.4.7 Modulus at 50% Elongation 3.0 - 8.0 MPa (Test Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D425-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 5 3.4.8 Tear Strengt
7、h, min 10 kN/m (ISO 34, Method B, procedure a/ ASTM D 624, Die C) 3.4.9 Brittleness Point, max +2 C (ISO 812, Type B specimen/ASTM D 2137, Method A) 3.4.10 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 50% (ISO 815/ASTM D 395, Method B, except 25% compressi
8、on, plied-up Type 1 specimens, 22 h at 150 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) 3.5.1 Hardness Change 0 to +12 3.5.2 Tensile Strength Change, max +30% 3.5.3 Elongation Change, max -60% 3.5.4 Visual Evaluation No surface tackiness or cracks when
9、folded flat against itself. 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 150 +/- 2 C) 3.6.1 Hardness Change +4 to +12 3.6.2 Tensile Strength Change, max -30% 3.6.3 Elongation Change, max -65% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against i
10、tself. 3.7 IMMERSION IN OIL No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.7.1 Hardness Change -1 to +5 3.7.2 Tensile Strength Change, max -25% 3.7.3 Elongation Change, max -30% 3.7.4 Volume Change -3 to +3% ENGINEERING MATERIAL SPECIFICATIONWSK-M2D425-APrinted copies are uncontrolled Copyright
11、2009, Ford Global Technologies, LLC Page 3 of 5 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -15 to -5 3.8.2 Tensile Strength Change, max -45% 3.8.3 Elongation Chang
12、e, max -10% 3.8.4 Volume Change +4 to +15% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN APPROVED TRANSMISSION FLUID OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) 3.9.1 Hardness Change -10 to +10 3.9.2 Te
13、nsile Strength Change, max -60% 3.9.3 Elongation Change, max -80% 3.9.4 Volume Change 0 to +10% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN APPROVED REAR AXLE OIL OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see pa
14、ra 5.1) 3.10.1 Hardness Change -4 to +8 3.10.2 Tensile Strength Change, max -15% 3.10.3 Elongation Change, max -25% 3.10.4 Volume Change -3 to +7% 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11 ASH CONTENT 0.1 - 1.0% (ASTM D 297 or TGA) ENGINEERING MATE
15、RIAL SPECIFICATIONWSK-M2D425-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 5 3.12 FINISHED PARTS 3.12.1 Hardness 64 - 78 (ISO 48, micro/ASTM D 1415, micro) Test Method: Prepare and mount specimens according to FLTM BP 106-04. The hardness shall be measured
16、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 shall be
17、 taken on each half part and be reported. The original and the changed hardness shall be measured on one and the same part. 3.12.2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) Hardness Change +2 to +10 Visual Evaluation No surface tackiness or cracks when folded fla
18、t against itself. 3.12.3 Immersion in Oil No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -4 to +2 Volume Change -3 to +3% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.12.4 Immersio
19、n in Oil No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -15 to -5 Volume Change +10 to +25% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.12.5 Immersion in Approved Transmission Flu
20、id of Affected Model Year (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) Hardness Change 0 to +12 Volume Change 0 to +12% ENGINEERING MATERIAL SPECIFICATIONWSK-M2D425-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of 5 Test Method: 0.5 g minimum we
21、ight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.12.6 Immersion in Approved Rear Axle Oil of Affected Model Year (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) Hardness Change 0 to +25 Volume Change 0 to +15% Test Meth
22、od: 0.5 g minimum weight, multiple specimens allowed. 3.12.7 Density 1.36 - 1.40 g/cm3(ISO 1183, Method A/ASTM D 297) 3.12.8 Ash Content 0.1 - 1.0% (ASTM D 297 or TGA) 3.12.9 Tensile Permanent Set, max 30% (FLTM BP 116-01, 50% elongation, 22 +/- 2 h at 100 +/- 2 C) % Set = d3-d1 / d2-d1 x 100 d1 = i
23、nside diameter, original d2 = inside diameter, elongated state d3 = inside diameter, after test 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 ot
24、her materials required for use in this specification contact: Materials Laboratory GB-13/100 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
