Corrosion-resistant steel for chimney/flue use in natural gas-fired or liquefied petroleum gas-fired plants
OwnerMatoko Nagasawa, Kenji Katoh +4inventors
InventorsMatoko Nagasawa, Kenji Katoh, Naoki Saitoh, Masayuki Kodama, Mutsuto Tanaka, Fumiaki Nakamura
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Abstract
Corrosion-resistant steel for chimney/flue use in natural gas-fired or liquefied petroleum gas-fired plants, containing C: 0.005% to 0.030%, Si: 0.18% to 0.50%, Mn: 1.50% to less than 3.00, P: 0.030% or less, S: 0.0050% or less, Cr: 4.0% to 9.0%, Al: 0.20% to 1.50%, and N: 0.020% or less and able to prevent advanced pitting or other localized corrosion and the resultant hole formation and rust aerial dispersal is provided.
Claims6
Corrosion-resistant steel for chimney/flue use in natural gas-fired or liquefied petroleum gas-fired plants, excellent in rust resistance, rust adhesion, and localized corrosion resistance, characterized by containing, by mass %,
- C:
- 0.005% to 0.030%,
- Si:
- 0.18% to 0.50%,
- Mn:
- 1.50% to less than 3.00,
- P:
- 0.030% or less,
- S:
- 0.0050% or less,
- Cr:
- 4.0% to 9.0%,
- Al:
- 0.20% to 1.50%,
- N:
- 0.020% or less, and
- having a balance of Fe and unavoidable impurities.
Dependencies are inferred from the claim text.