| 摘要 |
<p>A low-carbon sulfur-containing free-cutting steel having excellent cuttability which contains 0.02-0.15 mass% C, up to 0.004 mass% Si (excluding 0 mass%), 0.6-3 mass% Mn, 0.02-0.2 mass% P, 0.2-1 mass% S, up to 0.005 mass% Al (excluding 0 mass%), 0.008-0.04 mass% O, and 0.002-0.03 mass% N and in which the average oxygen concentration in the MnS is 0.4 mass% or higher.</p> |
