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–1·250%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–1·5Mn–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.
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