Cast Iron. ORE Blast Furnace PIG IRON CUPOLA FURNACE CAST IRON. White CI. Malleabilize. Grey CI. CAST IRONS. Stress concentration at flake tips avoided. Ductile CI. Malleable CI. Good castability C > 2.4%. Alloy CI. Gray Cast Iron.
Stress concentration at flake tips avoided
Good castability C > 2.4%
Malleable iron: dark graphite rosettes (temper carbon) in an –ferrite matrix
(ii) A pearlitic M.C.I. has pearlite matrix
(iii) An alloy M.C.I. contains chromium and nickel and possess high strength and low corrosion resistance.
4) M.C.I. possess high yield strength.
5) High young’s modulus and low coefficient of Thermal expansion.
Malleable Iron alloys.
Partially Malleabilized Iron Incomplete Ferritizing Anneal
Fully Malleabilized Iron Complete Ferritizing Anneal
7) Can be used from – 60 to 1200°F
8) Solidification range of 2550-2065°F
9) Low moderate cost.
10)M.C.I. contains 2-3% C, 0.6 -1.3% Si, 0.2 -0.6% Mn, 0.15% P and 0.10% S.
Nodular (ductile) iron: the dark graphite nodules are surrounded by an -ferrite matrix.
White iron: the light cementite regions are surrounded by pearlite, which has the ferrite–cementite layered structure.