1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions Rev 03 2011 12 15 N Status No Usage S. Ryzyi, 2002 09 24 Revised Updated and Renumbered 1963 03 22 CF6-115454-1 Released Controlled document at www.MATS Page 1 of 2 Copyright 2011, Ford Global Technologies,
2、Inc. GRAY CAST IRON - GRADE EA ESF-M1A91-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an alloy gray cast iron. 2. APPLICATION This specification was released originally for material used for the distributor driven gear. 3. REQUIREMENTS 3.1 STANDARD REQUIREME
3、NTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION (Cast Part Check Analysis) Total Carbon 3.20 - 3.70 Silicon 2.30 - 2.80 Carbon Equivalent* 4.2 max Manganese 0.55
4、- 0.95 Chromium 0.90 - 1.30 Molybdenum 0.45 - 0.75 Nickel 0.50 max Phosphorus 0.150 max Sulfur 0.150 max *The carbon equivalent is calculated as % carbon plus 1/3 of the % silicon minus 1/3 of the (% chromium - 0.10). 3.3 HARDNESS (Attribute data only) 3.3.1 Brinell 235 293 (casting) (ASTM E 10) 3.3
5、.2 Rockwell G 80 min (machined part) (ASTM E 18) (See Engineering drawing for measurement location.) ENGINEERING MATERIAL SPECIFICATION ESF-M1A91-A Page 2 of 2 3.4 MICROSTRUCTURE (ASTM E 562) The microstructure in the tooth area of the machined part at the neck end must consist of flake graphite and pearlite with a maximum of 2% ferrite and 3 to 7% carbides based on an average of 3 readings.
