If carbon content of steel is increased, which of the following parameter of steel will be reduced ? 

Explanation:

Carbon steel is an alloy of iron and carbon.

As the carbon content increases:

1. The ultimate strength of steel increases.
2. The elongation before fracture decreases.
3. The ductility of the metal decreases and Greater hardness is obtained.
4. Increasing carbon also reduces the weldability, especially above 0.25% carbon.
5. Plasticity and ductility are similar.

Generally, carbon is the most important commercial steel alloy. Increasing carbon content increases hardness and strength and improves hardenability.