FERRITIC STAINLESS STEEL SHEET HAVING SUPERIOR THERMAL FATIGUE RESISTANCE FOR COMPONENT OF AUTOMOTIVE EXHAUST SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet having superior thermal fatigue resistance for a component of an automotive exhaust system.;SOLUTION: The ferritic stainless steel sheet having the superior thermal fatigue resistance for the component of the automotive exhaust system comprises, by mass%, 0.02% or less C, 1.5% or less Si, 1.5% or less Mn, 0.04% or less P, 0.03% or less S, 0.2 to 2.5% Al, 0.02% or less N, 13 to 25% Cr, 0.5% or less Ni, 0.5% or less V, more than 0.5 to 1.0% Nb, 3×([%C]+[%N]) to 0.25% Ti, and the balance Fe with unavoidable impurities. The steel sheet may further contain, by mass%, 0.0003 to 0.0050% B, 0.3 to 2.5% Mo and 0.1 to 2.0% Cu.;COPYRIGHT: (C)2009,JPO&INPIT