“…The use of higher-strength steels for application, requiring both higher strength and toughness, demands better control of the weld-metal composition; specifically the weld-metal oxygen, nitrogen, and manganese, and other microalloying elements such as boron, titanium, vanadium and niobium (Shackleton 1972, Garland and Kirkwood 1975, Horigome et al 1978, Shiga et al 1977, Still and Roperson 1978. The use of higher-strength steels for application, requiring both higher strength and toughness, demands better control of the weld-metal composition; specifically the weld-metal oxygen, nitrogen, and manganese, and other microalloying elements such as boron, titanium, vanadium and niobium (Shackleton 1972, Garland and Kirkwood 1975, Horigome et al 1978, Shiga et al 1977, Still and Roperson 1978.…”