NODULAR CAST IRON

NODULAR CAST IRON

Introduction:-

In this type the graphite flakes appear as rounded particles or nodules or spheroids. It is also called as spheriodal graphite cast iron (SG Iron) or ductile cast iron. These spheriodising elements when added to melt eliminate sulphur and oxygen (from the melt), which changes solidification characteristics and possible account for the nodulisation.

Properties:

• It posses very good machinability Soft annealed grades of this type can be turned at very high speeds and feeds.
• It has damping capacity intermediate between cast iron and steel.
• It possesses excellent castability.
• It possesses high strength, ductility, modulus of elasticity and good fatigue strength.

Uses:

1. Used in IC engines, for making crankshafts, rocker arms, clutches, gears.
2. Power transmission equipments.
3. Valve and fitting, pipes, pumps and compressors.
4. Earth moving machinery for wheels, gears, rope drums.
5. For castings requiring corrosion and wear resistance.