AUSTENITE STEEL, AND AUSTENITE STEEL CASTING USING SAME

摘要

Provided herein are an austenite steel that satisfies desirable strength and desirable castability at the same time,and an austenite steel casting using same. The austenite steel according to an embodiment of the present invention contains Ni: 25 to 50%, Nb: 3.8 to 6.0%, Zr: 0.5% or less, B: 0.001 to 0.05%, Cr: 12 to 25%, Ti: 1.6% or less, Mo: 4.8% or less, and W: 5.2% or less in mass%, and the balance Fe and unavoidable impurities, wherein the parameter Ps represented by the following formula (1) satisfies Ps  38, Ps = 8.3[Nb]- 7.5[Ti]+2.4[Mo]+3.5[W] ... formula (1), where [Nb], [Ti], [Mo], and [W] represent the contents of Nb, Ti, Mo, and W, respectively, in mass%.