POSCO Holdings Inc.
CHROMIUM STEEL SHEET HAVING EXCELLENT CREEP STRENGTH AND HIGH TEMPERATURE DUCTILITY AND METHOD OF MANUFACTURING SAME

Abstract:

Provided are a chromium steel sheet having excellent creep strength and high-temperature ductility, and a method for manufacturing same. The present invention relates to a chromium steel sheet having excellent creep strength and high-temperature ductility comprising, in percentage by weight: C: 0.04 to 0.15%; Si: 0.5% or less (excluding 0%); Mn: 0.1 to 0.6%; S: 0.01% or less (excluding 0%); P: 0.03% or less (excluding 0%); Cr: 1.9 to 2.6%, Mo: 0.05 to 1.5%; W: 1.4 to 2.0%, V: 0.4 to 1.0%; Ni: 0.4% or less (excluding 0%); Nb: 0.10% or less (excluding 0%); Ti: 0.10% or less (excluding 0%); N: 0.015% or less (excluding 0%); Al: 0.06% or less (excluding 0%); B: 0.007% or less (excluding 0%); and the balance being Fe and inevitable impurities.