Steel of Turbine blade B50A947 A4

By 50 t, 3 LF electric arc furnace smelting furnace t electrode, electroslag remelting, insulation, annealing, 800 650 * 4 mill production process leaves Phi 180 steel refining, casting (%: 0 06 ~ 0 15C, 0 25 ~ 0 80M 11 25 ~ 13 n, 00C R, M o = 0 30, 60N