1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 25 N-STATUS No replacement named C. Mracna, NA 2004 07 21 Revised Para 3.0 inserted; para 3.9, 3.10 & 4 deleted 1975 01 09 Released (was ES-C8AP-7A548-A) CP5#768454 Printed copies are uncontrolled Copyright 2010, Ford Global Technologi
2、es, LLC Page 1 of 2 POLYACRYLATE RUBBER, HIGH TEMPERATURE - OIL ESP-M2D254-A SEAL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The polyacrylate material defined by this specification has good high temperature properties. 2. APPLICATION This specification was released originally for material used in transm
3、ission oil seals. 3. REQUIREMENTS These tests are to be conducted on ASTM slabs and buttons and/or actual seals. 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
4、ORIGINAL PROPERTIES Tensile Strength, min 1,400 psi (ASTM D 412) (9.7 MPa) Elongation, min 100% Hardness - Micro 70 - 80 IRHD (ISO 48/ASTM D 1415) 3.2 HEAT AGING (ASTM D 573, 70 h at 177 +/- 3 C) Volume Change -3 to 0% Hardness Change, max +15 IRHD Tensile Strength Change, max -45% 3.3 IMMERSION IN
5、ASTM NO. 1 OIL (ASTM D 471, aluminum block, 70 h at 149 +/- 1 C) Volume Change +/- 3% Hardness Change, max +5 IRHD Tensile Strength Change, max -5% 3.4 IMMERSION IN ASTM NO. 3 OIL (ASTM D 471, aluminum block, 70 h at 149 +/- 1 C) Volume Change, max +30% Hardness Change, max -25 IRHD Tensile Strength
6、 Change, max -30% ENGINEERING MATERIAL SPECIFICATIONESP-M2D254-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 3.5 IMMERSION IN TWO APPROVED ATFS, EACH CONTAINING A DIFFERENT ADDITIVE PACKAGE (ASTM D 471, aluminum block, 168 h at 163 +/- 3 C) Volume Change
7、 max +12% Hardness Change, max +10 IRHD Tensile Strength Change -35 to +10% 3.6 MODULUS OF ELASTICITY AT -18 C 210,000 psi (ASTM D 1053) (1.45 GPa) 3.7 COMPRESSION SET, max 3.7.1 Slab Stock 55% (ASTM D 395, Method “B“, plied, 70 h at 167 +/- 3 C) 3.7.2 Seals 45% (ASTM D 1414, Method “B“, 70 h at 14
8、9 +/- 1C) 3.8 ADIPIC ACID, by weight, max 0.1% (FLTM AP 1-1) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Test procedure will qualify the actual seals for use at -40 C. 5.2 When actual seal is a
9、n “O“ ring or other non-rectangular cross section 60% compression set is acceptable. 5.3 Use a 3.5 in (89 mm) long seal segment and pull at 10 in (254 mm)/min for tensile strength. 5.4 When ASTM slabs are tested, durometer “A“ hardness (ASTM D 2240) may be used in place of microhardness (ISO 48/ASTM D 1415).
