| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide austenitic stainless steel which has oxidation resistance property and high-temperature strength, facilitates manufacturing of raw materials and processing to products by forming and welding, can be used for a large range of fields and exhibits excellent economy. <P>SOLUTION: The austenite stainless steel has a chemical composition including: 0.05-0.20% ofC, less than 1.0% of Si, 2.0% or less of Mn, 0.04% or less of P, 0.01% or less of S, 20.0-30.0% of Cr, 10.0-15.0% of Ni, 0.10-0.42% of N, 0.0010-0.01% of B, 0.01-0.10% of La+Ce, 0.01-0.20% of sol.Al, Fe for balance and impurities. The C concentration at a surface layer in the thickness direction is higher than that at the center in the thickness direction by 0.03% or more, and/or the N concentration at the surface layer in the thickness direction is higher than that at the center in the thickness direction by 0.03% or more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
