Why only 6.67% of carbon is added in IRON CARBON DIAGRAM.

Question

Accepted Answer

6.67% carbon is added in the Iron Carbon Diagram to achieve the desired properties of steel.

The addition of 6.67% carbon allows for the formation of a eutectoid composition, which results in the formation of pearlite.
Pearlite provides a desirable combination of strength and ductility in steel.
Higher carbon content can lead to the formation of brittle phases like cementite, reducing the mechanical properties of the steel.
Lower carbon content results in a ferrite-pearlite microstructure, which may not possess the desired strength and hardness.
The 6.67% carbon content is a balance between achieving the desired properties and avoiding the formation of undesirable phases.

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