1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 20 N-STATUS No Replacement Named C. Mracna, NA 2004 07 23 Revised Para 3.0 inserted; para 3.4 & 4 deleted 1974 10 09 Released CW10-711072 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 4 NITRILE
2、 BUTADIENE RUBBER, HIGH HEAT RESISTANT ESW-M2D247-A - OIL SEALS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by this specification are nitrile butadiene rubbers compounded specially for heat resistance significantly higher than that of conventional NBR compounds, without sacrificing
3、other desirable properties. 2. APPLICATION This specification was released originally for material used in miscellaneous oil seal and gasketing applications for continuous automotive service at temperatures up to 135 C with occasional temperatures as high as 150 C. Type I was released originally for
4、 static pressure seals and Type II was released originally for rotational shaft seals. The Type III material was compounded with an internal lubricant for ease of assembly. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Co
5、mpanys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 RAW MATERIAL 3.1.1 Oscillating Disk Rheometer or Shearing Disk Viscometer (ASTM D 2084 or ASTM D 1646 respectively) The compound must have a curve or viscosity and scorch data that corresponds to original material approved f
6、or use that is on file in the suppliers quality control office and the affected product engineering materials office. Utilizing the established operating parameters, the following ranges must be maintained: Rheometer: Type I Type II Type III ML- Minimum Torque, N-m +/- 0.4 +/- 0.4 +/- 0.4 MHF- Maxim
7、um Torque, N-m +/- 0.9 +/- 0.9 +/- 0.9 tS2- Scorch Time for 0.2 +/- 1.0 +/- 3.0 +/- 1.0, -0.5 N-m Rise Above Minimum Torque, minutes ENGINEERING MATERIAL SPECIFICATIONESW-M2D247-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 4 Type I Type II Type III Viscom
8、eter Minimum Viscosity (Mooney) +/- 8 t2.5- Scorch Time at a 2.5 +/- 0.75 min. point rise 3.2 PART 3.2.1 Specific Gravity +/- 0.03 1.30 - 1.36 1.18 +/- 0.03 (ASTM D 792) Each supplier must establish values for their compound prior to source approval and be able to maintain these values within the gi
9、ven tolerance. 3.2.2 Hardness - Micro, IRHD 65 - 75 75 - 85 68 - 78 (ASTM D 1415) 3.2.3 Thermal Analysis and Pyrolytic Chromatography Ford Motor Company, at its option, may conduct pyrolytic gas chromatography, thermogravimetric analysis and differential thermal analysis of material/parts supplied t
10、o this specification. The spectra established for initial approval shall constitute the reference standard and shall be kept on file at designated materials laboratory. All samples shall produce spectra that correspond to the reference standard when tested under the same conditions as those specifie
11、d on the master spectrum. The infrared spectra of the toluene extractables of the Type III material must be distinguishable from the Type I and Type II spectra. 3.2.4 Additional Requirements Any requirements applicable to specific parts shall be specified on the engineering drawings or in a separate
12、 engineering specification identified on the drawing. 3.3 INITIAL QUALIFICATION These tests are to be conducted on slab stock by all material suppliers prior to source approval and at least once every 6 months. 3.3.1 Original Properties Type I Type II Type III Hardness, Durometer “A“ 65 - 75 75 - 85
13、 68 - 78 (ASTM D 2240) Tensile Strength, MPa, min 13.8 13.8 13.8 (ASTM D 412, Die “C“) Elongation, % min 175 225 175 (ASTM D 412, Die “C“) Modulus at 100% 6.6 5.2 6.6 Elongation, MPa, min (ASTM D 412, Die “C“) ENGINEERING MATERIAL SPECIFICATIONESW-M2D247-A Printed copies are uncontrolled Copyright 2
14、009, Ford Global Technologies, LLC Page 3 of 4 Type I Type II Type III 3.3.2 Heat Aged (ASTM D 865, aluminum block, 168 h at 150 +/- 2 C) Hardness Durometer +5 to +15 0 to +10 +5 to +20 “A“ Change Tensile Strength -15 -40 -75 Change, % max Elongation Change, -70 -70 -90 % max 3.3.3 Immersion in ASTM
15、 No. 1 Oil (ASTM D 471, aluminum block, 150 +/- 2 C, 70 h for Type I and Type III, 168 h for Type II) Hardness Durometer “A“ Change 0 to +10 0 to +10 0 to +10 Tensile Strength Change, % max -15 -15 -25 Elongation Change, % max -35 -20 -35 Volume Change, % 0 to -10 0 to -10 0 to -10 3.3.4 Immersion i
16、n ASTM No. 3 Oil (ASTM D 471, aluminum block, 150 +/- 2 C, 70 h for Type I and Type III, 168 h for Type II) Hardness Durometer “A“ Change -10 to 0 -15 to -5 -15 to 0 Tensile Strength Change, % max -30 -30 -40 Elongation Change, % max -35 -20 -40 Volume Change, % 0 to +20 0 to +20 0 to +25 3.3.5 Imme
17、rsion in Automatic Transmission Fluid, ESP-M2C138-CJ (ASTM D 471, aluminum block, 150 +/- 2 C, 70 h for Type I and Type III, 168 for Type II) Hardness Durometer “A“ Change +/- 5 +/- 5 +/- 5 Tensile Strength Change, % max -50 -50 -50 Elongation Change, % max -50 -50 -50 Volume Change, % 0 to +10 0 to
18、 +10 0 to +10 ENGINEERING MATERIAL SPECIFICATIONESW-M2D247-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 Type I Type II Type III 3.3.6 Low Temperature Pass Pass Pass Brittleness (ASTM D 746, Procedure “B“ non-brittle after 3 min at 32 C) 3.3.7 Low Temper
19、ature Retraction (TR-10) (ASTM D 1329) Each supplier must establish values for their compound prior to source approval and be able to maintain these values within the given ranges. Unaged Material +/- 1 +/- 1 +/- 1 (as received), C After Oil Aging per +/- 2 +/- 2 +/- 2 Para 3.3.3, C 3.3.8 Compression Set, % max 40 50 40 (ASTM D 395, Method “B“, plied, 70 h at 150 +/- 2 C)
