Affect factors for toughness of steel

Toughness of steel refers to the ability of steel to withstand shock or vibration loads. The measure is called the impact toughness value.

Affecting factors for toughness of steel is as follows
(1) Chemical composition
(2) Smelting, pouring, rolling process and treatment
(3) Hardening of steel
(4) Complex stress
(5) Stress concentration
(6) Residual stress
(7) Temperature
(8) Repeated load action.