1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 29 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 22 Revised Inserted 3.0; Deleted 3.7 & 4 1972 01 28 Released MD/ET0238/QP Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 2 AC
2、RYLIC RUBBER SQ-M2D9025-AA NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an acrylic rubber for high temperature service. 2. APPLICATION This material is generally used as transmission clutch piston seal in automatic transmission. 3. REQUIREMENTS If not otherwis
3、e specified tests are to be carried out on slab stock. 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). 3.1 ORIGINAL PROPERTIES Hardness, Shore “A“ 80 - 90 (ASTM D 22
4、40) Tensile Strength, min 10.3 MN/m2(ASTM D 412) Tensile Stress at 50% Elongation, min 4.3 MN/m2(ASTM D 412) Elongation at Break, min 100% (ASTM D 412) 3.2 CHANGE AFTER AGEING IN HOT AIR 70 h at 150 +/- 2 C (ASTM D 865) Hardness Less than 92 Units Tensile Strength 0 to -15% Elongation at Break 0 to
5、-25% ENGINEERING MATERIAL SPECIFICATIONSQ-M2D9025-AAPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.3 CHANGE AFTER AGING IN AT LEAST TWO APPROVED AUTOMATIC TRANSMISSION FLUIDS TO SPECIFICATION SQ-M2C9007-AA HAVING DIFFERENT ADDITIVE PACKAGES, 168 h at 150
6、+/- 2 C (ASTM D 471) Hardness -10 to +5 Units Tensile Strength 0 to -20% Elongation at Break 0 to -45% Volume +2 to +10% Note: Volume change to be determined on actual seals and slab stock from same batch of material. 3.4 COMPRESSION SET, max 65% (ASTM D 395, Method B, 70 h at 150 +/- 2 C) 3.5 LOW T
7、EMPERATURE RESISTANCE (5 h at -15 + 1 C) Tests are to be carried out on slab stock. Condition samples prior to cold test as follows: 1) As received. 2) Immerse samples in at least two approved automatic transmission fluids to specification SQ-M2C9007-AA having different additive packages, 70 h at 15
8、0 +/- 2 C (ASTM D 471). Test Method: Slab Stock - Bend samples around an also conditioned mandrel having an outside diameter of 25 mm. Materials must pass indicated test without cracking. 3.6 INFRARED SPECTROSCOPY The material shall have an infrared curve which corresponds to the master curve of the original approved sample.
