POSCO Holdings Inc.
STEEL PLATE FOR HIGH TEMPERATURE APPLICATIONS HAVING EXCELLENT STRENGTH AT HIGH TEMPERATURE AND METHOD FOR MANUFACTURING THE SAME

Abstract:

Provided are a steel plate for high temperature applications having excellent strength at a high temperature and a method for manufacturing same. The steel plate for high temperature applications having excellent post-weld heat treatment resistance, according to the present invention, comprises by weight percent: C:0.05-0.25%; Mn:0.1-1.0%; Si:0.1-0.8%; Cr:1-3%; Cu:0.05-0.3%; Mo:0.5-1.5%; Ni:0.05-0.5%; Al:0.005-0.1%; and at least one of Ir:0.005-0.10% and Rh:0.005-0.10%, the balance being Fe and inevitable impurities.