1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 29 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 14 Revised Inserted 3.0; Deleted 3.9, 3.10 & 4 1978 12 06 Released was ESEA-M2D1010-A SM/ER2212 TC Printed copies are uncontrolled Copyright 2009, Ford Global Technol
2、ogies, LLC Page 1 of 2 RUBBER - STEERING RACK BOOT SA-M2D9124-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polychloroprene rubber of good ageing quality and moderate oil resistance. 2. APPLICATION Parts molded of this material include the convoluted boots
3、used to seal steering racks. 3. REQUIREMENTS (Test slabs or parts as indicated) 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 HARDNESS (slab and parts) IRHD 40
4、 - 50 (ISO R 48) 3.2 TENSILE STRENGTH (slab and parts) N/mm2, min 6.9 (ISO R 37 Type 1 Die) 3.3 ELONGATION AT BREAK (slab and parts), % min 350 (ISO R 37 Type 1 Die) 3.4 TENSION SET (test slab) 175% elongation, % max 10 (ISO 2285) 3.5 COMPRESSION SET (ISO R 815, 22 h at 70 C, 25% deflection, 10 minu
5、tes recovery) 3.5.1 On parts, % max 50 3.5.2 On test slabs, % max 30 3.6 OIL IMMERSION (On samples cut from slabs) (ISO R 1817) 3.6.1 In ASTM No 1 Oil 72 h at 70 +/- 2 C Volume change % -20 to 0 3.6.2 In ASTM No 3 Oil 72 h at 70 +/- 2 C Volume change % 0 to +75 ENGINEERING MATERIAL SPECIFICATIONSA-M
6、2D9124-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.7 OZONE RESISTANCE (slabs & parts) Rating 0 (FLTM BP 101-01) 3.8 COLD FLEX TEST The molded boot shall be assembled on a jig so that it can be compressed axially after 16 - 24 hours soak at -50 C. The maximum load to compress the part by 38 mm in less than 10 seconds shall be 44.5 N.
