The role of nickel in steel

(1)The strength of the steel can be improved without significantly reducing its toughness.

(2) the brittle transition temperature of the steel can be reduced, and the low temperature toughness       of the steel can be improved.

(3) improving the machinability and weldability of steel

(4) can improve the corrosion resistance of steel, not only acid resistance, but also alkali and            atmospheric corrosion resistance.

The role of Molybdenum in Steel

(1)Improve the thermal strength of steel

(2)the effect of resistance to hydrogen erosion.

(3) improving the hardenability of steel