NOVELTY - A refractory material (2) is constructed to ladle (1) and has raw material containing coarse aggregate having 1 mm or more alumina particle, and fine aggregate having less than 1 mm alumina particle. The coarse aggregate has the mass ratio of 40-60% with respect to total weight of the raw material. The pre-refinement process is carried out to refine steel. The refinement process is carried out to refine the molten steel (20) in the ladle, to obtain steel.    USE - Manufacture of steel used for saw wire for e.g. cutting blade for cut-processing silicon solar battery, and semiconductor silicon wafer.    ADVANTAGE - The method enables manufacture of steel with excellent strength, durability, and suppress gap, and infiltration, and provides saw wire in which the frequency of disconnection is less during wire drawing.    DETAILED DESCRIPTION - A refractory material is constructed to ladle and has raw material containing coarse aggregate having 1 mm or more alumina particle, and fine aggregate having less than 1 mm alumina particle. The coarse aggregate has the mass ratio of 40-60% with respect to total weight of the raw material. The volume ratio of coarse aggregate having crystal diameter of 100 mm or less is 3% or less. The volume ratio of fine aggregate having 20-60 mm or less of crystal diameter is 5% or less and 10 mm or less of crystal diameter is 40% or less. The pre-refinement process is carried out to refine steel. The refinement process is carried out to refine the molten steel in the ladle, to obtain steel. When amount of stirring molten metal is set to 65-85 KJ/ton, sol aluminum is 8 ppm or less, the slag composition of pre-refinement process comprises 0.5-1.2 %mass carbon/sulfur, 5-15 mass% aluminum oxide, and 2-15 %mass magnesium oxide, and the output unit of slag is 5-15 Kg/ton. When amount of stirring molten metal is set to 5-15 KJ/ton, sol aluminum is 2 ppm or less, the slag composition of pre-refinement process comprises 0.5-1.2 %mass carbon/sulfur, 5-15 mass% aluminum oxide, and 2-15 %mass magnesium oxide, and the output unit of slag is 5-15 Kg/ton.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of refinement process of steel for saw wires. (Drawing includes non-English language text)    Ladle (1)    Refractory material (2)    Shell (3)    Molten steel (20)    Secondary-refining installation (21)    Electrode type heating apparatus (22)    Plug for bottom blow (23)