What elements decrease notch impact toughness and ductilityS

What elements decrease notch impact toughness and ductility?

Solution

The two elements that decrease notch impact toughness and ductility of steels are as follows :

1) Sulphur decreases notch impact toughness, reduces weldability and decreases ductility. It generally appears as sulphide inclusions in the steel which decreases its strength.

2) Phosphorus increases strength and hardness but decreases ductility and notch impact toughness of steel.