초록 ▼

The present invention relates to the austenitic steel having improved resistance to oxidation at the high temperature, comprising not more than 0.10% C, 0.1-5.0% Si, not more than 3% Mn, 7-45% Ni, 15-30% Cr and sulfur content being restricted to not more than 0.003%. According to the present inventi

The present invention relates to the austenitic steel having improved resistance to oxidation at the high temperature, comprising not more than 0.10% C, 0.1-5.0% Si, not more than 3% Mn, 7-45% Ni, 15-30% Cr and sulfur content being restricted to not more than 0.003%. According to the present invention, by limiting the sulfur content in the austenitic steel to not more than 0.003%, preferably to not more than 0.0015%, the heat-resisting steel material which can show improved resistance to oxidation under severe conditions including repeated heating to high temperatures and cooling to room temperature is provided.

대표청구항 ▼

An austenitic steel, said austenitic steel having improved resistance to oxidation at temperatures above 700°C. and consisting essentially of the following alloying elements: C: not greater than 0.10% Si: more than 1%, but not greater than 5.0% Mn: not greater than 3.0% Ni: 7-15% Cr: 15-20%, the amo

An austenitic steel, said austenitic steel having improved resistance to oxidation at temperatures above 700°C. and consisting essentially of the following alloying elements: C: not greater than 0.10% Si: more than 1%, but not greater than 5.0% Mn: not greater than 3.0% Ni: 7-15% Cr: 15-20%, the amounts of said alloying elements being adjusted to result in an austenitic microstructure, and a balance of iron and impurities of which sulfur is restricted to not greater than 0.003%.