Manhole Cover Material Comparison
Ductile, spheroidal graphite cast iron is a type of graphite-rich iron which has much more impact and fatigue resistance, due to its nodular graphite inclusions
Grey, flake graphite cast iron is a type of cast iron that has a graphitic mictrostructure.
CHARACTERISTICS
DUCTILE IRON
GREY IRON
Castability
Ease of Machining
Vibration Damping
Surface Hardenability
Modulus of Elasticity
Impact Resistance
Corrosion Resistance
Strength / Weight
Wear Resistance
Cost of Manufacture
