1 2 • • 3 4 70 70 80 80 90 90 2000 2000 0 0 50 50 100 100 0 0 100 100 200 200 Kg/t Kg/t- -p p 0 0 1.0 1.0 1.5 1.5 Kl Kl 0 0 400 400 500 500 Mcal/t Mcal/t- -s s 300 300 200 200 100 100 CDQ CDQ TRT TRT 0 0 40 40 50 50 30 30 20 20 10 10 1970 1970 1975 1975 1980 1980 1985 1985 1990 1990 1995 1995 2000 2000 2005 2005 CC Continuous Casting North American Program ULCOS Eurofer Korean Program,POSCO South