A method of making a steel pipe, comprising: providing a steel composition comprising: 0.04-0.12 wt. % carbon (C); 0.01 to 0.03 wt. % titanium (Ti); 0.0005 to 0.003 wt. % boron (B); less than or equal to 0.008 wt. % nitrogen (N); 0.6 to 1.6 wt. % manganese (Mn); 0.05 to 0.3 wt. % silicon (Si); less than or equal to 0.5 wt. % nickel (Ni); less than or equal to 0.5 wt. % chromium (Cr); less than or equal to 0.5 wt. % molybdenum (Mo); less than or equal to 0.15 wt. % vanadium (V); and less than or equal to 0.05 wt. % niobium (Nb); the concentration of each element being based upon the total weight of the steel composition; wherein 0.0005 to 0.002 wt. % boron is in solid solution for improving hardenability; wherein substantially all of the nitrogen is present in the form TiN particles to avoid the formation of boron nitrides and achieve said boron content in solid solution, and cooling a bar cast from the steel composition, wherein the cooling rate at about the center of the bar is selected such that TiN particles formed in the bar exhibit a mean diameter less than about 50 nm; wherein the steel bar is cooled from casting at a rate greater than 10°C/min at about the center of the bar, forming a pipe from the bar by reheating the steel bar to between 1200 to 1300°C; piercing the reheated bar at temperatures ranging between 1100 to 1200°C; and hot rolling the pierced bar at temperatures ranging between 900-1100°C; followed by cooling the steel pipe in air from hot rolling at a rate less than 1°C /sec; and subsequently austenizing and quenching the hot rolled steel pipe; wherein hot rolling achieves an austenitic grain size of the microstructure of the steel pipe, prior to cooling from hot rolling, within a range between 20 to 50 μm, and wherein the final microstructure of the steel pipe comprises a mixture of bainite and martensite with no more than 30% of martensite if no tempering is performed after quenching and no less than 30% of martensite if tempering is performed after quenching. providing a steel composition comprising: 0.04-0.12 wt. % carbon (C); 0.01 to 0.03 wt. % titanium (Ti); 0.0005 to 0.003 wt. % boron (B); less than or equal to 0.008 wt. % nitrogen (N); 0.6 to 1.6 wt. % manganese (Mn); 0.05 to 0.3 wt. % silicon (Si); less than or equal to 0.5 wt. % nickel (Ni); less than or equal to 0.5 wt. % chromium (Cr); less than or equal to 0.5 wt. % molybdenum (Mo); less than or equal to 0.15 wt. % vanadium (V); and less than or equal to 0.05 wt. % niobium (Nb); the concentration of each element being based upon the total weight of the steel composition; wherein 0.0005 to 0.002 wt. % boron is in solid solution for improving hardenability; wherein substantially all of the nitrogen is present in the form TiN particles to avoid the formation of boron nitrides and achieve said boron content in solid solution, and cooling a bar cast from the steel composition, wherein the cooling rate at about the center of the bar is selected such that TiN particles formed in the bar exhibit a mean diameter less than about 50 nm; wherein the steel bar is cooled from casting at a rate greater than 10°C/min at about the center of the bar, forming a pipe from the bar by reheating the steel bar to between 1200 to 1300°C; piercing the reheated bar at temperatures ranging between 1100 to 1200°C; and hot rolling the pierced bar at temperatures ranging between 900-1100°C; followed by cooling the steel pipe in air from hot rolling at a rate less than 1°C /sec; and subsequently austenizing and quenching the hot rolled steel pipe; wherein hot rolling achieves an austenitic grain size of the microstructure of the steel pipe, prior to cooling from hot rolling, within a range between 20 to 50 μm, and wherein the final microstructure of the steel pipe comprises a mixture of bainite and martensite with no more than 30% of martensite if no tempering is performed after quenching and no less than 30% of martensite if tempering is performed after quenching. <EOS>