| 摘要 |
This invention provides a forging steel excellent in forgeability, which forging steel consists of, in mass%, C: 0.001 to less than 0.05%, Si: 1.30% or less, Mn: 0.01 to 4.0%, Cr: 5.0% or less, P: 0.2% or less, S: 0.35% or less, Al: 0.019 to 2.0%, N: 0.03% or less, one or both (including 0%), and a balance of iron and unavoidable impurities; wherein Di given by the following Equation (1) is 60 or greater: Di= 5.41 x Di(Si) x Di(Mn) x Di(Cr) x Di(Mo) x Di(Ni) x Di(Al) |
