Vanadium - Transforming Possibilities

Effect of vanadium, nitrogen, and aluminium onthe mechanical properties of reinforcing bar steels

Abstract:

A systematic study has been made of the effects of vanadium, nitrogen, and aluminium on the properties of 18 and 30 mm rolled bars, having a base composition of 0.24%C-1.25%Mn-0.475%Si, as used for high-strength reinforcing bars. It has been shown that additions of vanadium up to 0.18% can increase the yield strength by 207-256 N/mm2, depending on the diameter and the level of other elements, without impairing the bend and rebend properties. The effect of vanadium on a 0.13C-l.5Mn-0.45Si steel has also been studied. Variations in finish-rolling temperature had very little effect on the properties. The weldability of a limited number of steels was shown to be equal to that of C-Mn steels. The properties of a number of commercial steel reinforcing bars having similar compositions are also included for comparison.