| 摘要 |
To provide a heat-resistant austenitic stainless steel having high-temperature strength and sag-resistance capable of resisting working temperatures of not less than 550° C. as well as being low in cost, and a production process thereof. The steel consistent with the present invention contains not more than 0.1 wt % C, less than 1.0 wt % Si, 1.0 wt % to 10.0 wt % Mn, not more than 0.03 wt % P, not more than 0.01 wt % S, 0.01 wt % to 3.0 wt % Cu, 7.0 wt % to 15.0 wt % Ni, 15.0 wt % to 25.0 wt % Cr, 0.5 wt % to 5.0 wt % Mo, not more than 0.03 wt % Al, 0.4 wt % to 0.8 wt % N, and the remainder substantially consisting of Fe and unavoidable impurities.
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