The strength, hardness, plasticity and toughness of 45 steel, T8 steel and T12 steel were compared under annealing condition. I hope you can answer my question as soon as possible!

The strength, hardness, plasticity and toughness of 45 steel, T8 steel and T12 steel were compared under annealing condition. I hope you can answer my question as soon as possible!

T8 steel grade, because it is tool steel, comprehensive mechanical properties requirements are OK,45# steel needless to say, its mechanical properties are very general, T12 seems to be used on the scalpel, very sharp, high hardness, of course toughness is poor, brother next time to reward oh!

T8 steel grade, because it is tool steel, the comprehensive mechanical property requirements are OK,45# steel needless to say, its mechanical property is very general, T12 seems to be used on the scalpel, very sharp, high hardness, of course toughness is poor, brother next time to reward oh!

The higher the carbon content, the higher the strength and hardness of the steel, the plasticity and toughness of the steel, especially after heat treatment

Relatively speaking, even higher is cast iron, within the allowable value of steel, correct!