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 3.3 & 4 1971 07 15 Released MD/ET0168QP Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 3 SYN
2、THETIC RUBBER FOR HIGH TEMPERATURE SERVICE SQ-M2D9024-AA NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a synthetic rubber such as Buna-N, adaptable to high temperature service conditions. 2. APPLICATION This material is generally used as oil seals in automatic
3、transmissions and hydraulic systems or as shown on engineering drawing. 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). 3.1 REQUIREMENTS OF SLAB STOC
4、KS 3.1.1 Original Properties Hardness, Shore “A“ 65 - 70 (ASTM D 2240) Tensile Strength, min 10.3 MN/m2(ASTM D 412, Die C) Elongation at Break, min 250% (ASTM D 412, Die C) 3.1.2 Change After Ageing in ASTM Oil No. 1 168 h at 140 +/- 2 C (ASTM D 471) Hardness -10 to +10 Units Tensile Strength, max -
5、20% Elongation at Break, max -60% Volume 0 to -6% Note: Volume change to be determined on typical seals in addition to slab stock from same batch of material. Bend Test No cracks Material shall be bent completely flat against itself.ENGINEERING MATERIAL SPECIFICATIONSQ-M2D9024-AAPrinted copies are u
6、ncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.1.3 Change After Ageing in ASTM Oil No. 3 168 h at 140 +/- 2 C (ASTM D 471) Hardness, max -20 Units Tensile Strength, max -30% Elongation at Break, max -40% Volume +12 to +19% Note: Volume change to be determined on typical seal
7、s in addition to slab stock from same batch of material. Bend Test No cracks Material shall be bent completely flat against itself. 3.1.4 Change After Ageing in Hot Air, 70 h at 120 +/- 2 C (ASTM D 865) Hardness, max +10 Units Tensile Strength, max -15% Elongation at Break, max -35% Bend Test No cra
8、cks Material shall be bent completely flat against itself. 3.1.5 Change After Ageing in Each Approved Automatic Transmission Fluid to Spec. SQ-M2C9007-AA, 168 h at 140 +/- 2 C (ASTM D 471) Hardness -10 to +10 Units Tensile Strength, max -50% Elongation at Break, max -60% Volume +2 to +10% Bend Test
9、No cracks Material shall be bent completely flat against itself. ENGINEERING MATERIAL SPECIFICATIONSQ-M2D9024-AAPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.1.6 Low Temperature Resistance (ASTM D 746, Method B) Nonbrittle after 3 minutes at -25 C Note:
10、Condition samples prior to cold test per following methods: 1) Normal (as received) 2) Immerse samples in ASTM Oil No. 1 (ASTM D 471) for 168 h at 140 +/- 2 C 3) Immerse samples in ASTM Oil No. 3 for 168 h at 140 +/- 2 C (ASTM D 471) 4) Immerse samples in each approved automatic transmission fluid t
11、o specification SQ-M2C9007-AA for 168 h at 140 +/- 2 C (ASTM D 471) 3.1.7 Compression Set, max 35% (ASTM D 395, Method B, 70 h at 120 +/- 2 C) 3.2 REQUIREMENTS OF ACTUAL SEALS (Production shipments) 3.2.1 Change After Ageing in ASTM Oil No. 1, 168 h at 140 +/- 2 C (ASTM D 471) Volume 0 to -6% Note:
12、The weight of seal stock for volume change determination shall be 0.4 gram min in some instances this will require several seals to be used as the test specimen. Bend Test No cracks Material shall be bent completely flat against itself. 3.2.2 Change After Ageing in ASTM Oil No. 3, 168 h at 140 +/- 2 C (ASTM D 471) Volume +12 to +19% Note: The weight of seal stock for volume change determination shall be 0.4 gram minimum. In some instances this will require several small seals to be used as the test specimen. Bend Test No cracks Material shall be bent completely flat against itself.
