| 摘要 |
A non-magnetic austenitic stainless cast steel having high yield strength at room temperature without losing ductility at liquid nitrogen temperature, permitting easy casting without requiring the solution heat treatment, containing (by mass %) 0.08 percent or less carbon, 0.1 to 1.5 percent silicon, 0.1 to 1.5 percent manganese, 13 to 15 percent nickel, 18 to 19 percent chromium, 2 to 2.5 percent molybdenum, 0.005 to 0.1 percent aluminum, and 0.12 to 0.2 percent nitrogen, with the remainder of the steel being iron and incidental impurities, and having an elongation at liquid nitrogen temperature having 30 percent or more, 0.2% yield strength at room temperature having 240 MPa or more and relative magnetic permeability having 1.10 or less.
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