Strength at elevated temperature and the heatproof austenite type rustless steel which is superior in resistance iteration oxidation property

摘要

Topic As it possesses the chemical composition composition where the content of Ni and Cr is equal to the 18Cr8Ni austenite type rustless steel, it possesses necessary strength at elevated temperature as a heat exchanger tube, burble of the oxide in iteration oxidation environment without at the same time depending on the addition and finishing of Al and Si, is little, the heatproof austenite type rustless steel which is superior in the resistance iteration oxidation property which thinning is difficult to occur is offered. SolutionsAs for heatproof austenite type rustless steel of this invention, C: 0.05 - 0.2%, Si: 0.1 - 1%, Mn: 0.1 - 2.5%, Cu: 1 - 4%, Ni: 7 - 12%, Cr: 16 - 20%, Nb: 0.1 - 0.6%, Zr: 0.05 - 0.4%, Ce: 0.005 - 0.1%, Ti: 0.1 - 0.6%, B: 0.0005 - 0.005%, N: 0.001 - 0.15%, S: 0.005% or less (0% it is not included) or P: 0.05% or less (it is not included) the husband Various to contain 0%, the remainder consists of the iron and the inevitable impurity. Choice figure It is not