1, EAF=LF+ESR+Forge+Anneal+UT+Peeling/Turnning/Milling 2, Size: Round bar: diameter 50-380mm'; Length:2-5m Flat bar: Width:100-600mm; Thickness:30-300mm Length:1.5-3.5m 3, Chemical composition: C Si Mn Cr Mo V P S 0.32-0.45 0.80-1.20 0.20-0.50 4.75-5.50 1.10-1.75 0.08-1.20