Ferritic stainless steel sheet superior in heat resistance

Details Ferritic stainless steel sheet superior in heat resistance Ferritic stainless steel sheet superior in heat resistance

2007-12-26

2011-11-22

Silverman, Stanley (Department: 1736)

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

C420S008000, C420S061000, C420S064000, C420S067000, C420S068000

Reexamination Certificate

active

08062584

ABSTRACT:
The present invention provides, as a material superior in heat resistance in a hot environment where the maximum temperature of the exhaust gas becomes 750 to 900° C., ferritic stainless steel sheet superior in heat resistance in a broad temperature region of 750 to 900° C. with long term stability by a smaller amount of addition of Mo than SUS444 containing about 2% of expensive Mo, that is, ferritic stainless steel sheet superior in heat resistance characterized by containing, by mass %, C: 0.01% or less, N: 0.02% or less, Si: 0.05 to 1%, Mn: 0.1 to 2%, Cr: 10 to 30%, Mo: 0.1 to 1%, Cu: 1 to 2%, Nb: 0.2 to 0.7%, Ti: 0.01 to 0.3%, and B: 0.0002 to 0.0050%, having a balance of Fe and unavoidable impurities, and having a 0.2% yield strength at 750° C. of 70 MPa or more.

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