1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 09 24 Revised Updated and renumbered 1992 09 01 NC00E10079779030 Revised if used as lot control, a min of 1 every 8 h. 3.5 MICROSTRUCTURE (ASTM A 247) The described microstructure shall be evaluated in
2、accordance with the above standard. Graphite Type A predominant with Type B not to exceed 40 %. Types D and E not to exceed 10 %. Type C not to exceed 5 %. Graphite flake size: 3 - 5. Matrix Fine lamellar pearlite with max of 5 % ferrite and not more than 1 % carbides. ENGINEERING MATERIAL SPECIFICA
3、TION ESA-M1A43-B Page 3 of 3 Copyright 2002, Ford Global Technologies, Inc. 3.6 COMPOSITE-TYPE CASTINGS Chill areas at the junction of the cast iron and steel are undesirable and should be avoided or minimized as much as possible. The iron should fill solidly around the locking flanges on the steel drum back and must meet the contact specification shown on the released drawing after machining.
