Ferritic stainless steel
US-9487849-B2 · Nov 8, 2016 · US
Ferritic stainless steel
US10975459B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10975459-B2 |
| Application number | US-201615764013-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 20, 2016 |
| Priority date | Sep 29, 2015 |
| Publication date | Apr 13, 2021 |
| Grant date | Apr 13, 2021 |
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Abstract
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Provided is a ferritic stainless steel excellent in oxidation resistance and thermal fatigue resistance. The ferritic stainless steel contains, in mass %, C: 0.020% or less, Si: more than 0.1% and 3.0% or less, Mn: 0.05 to 2.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.3 to 6.0%, N: 0.020% or less, Cr: 12 to 30%, Nb: more than 0.3% and 1.0% or less, Ti: 0.01 to 0.5%, Mo: 0.3 to 6.0%, Co: 0.01 to 3.0%, and Ni: 0.02 to 1.0%, the balance being Fe and unavoidable impurities. Moreover, Si+Al>1.0%, Al—Mn>0%, and Nb—Ti>0% hold.
First claim
Opening claim text (preview).
The invention claimed is: 1. A ferritic stainless steel having a composition consisting of, in mass %, C: 0.020% or less, Si: more than 0.1% and 3.0% or less, Mn: 0.05 to 2.0%, P: 0.050% or less, S: 0.010% or less, Al: more than 2.0% to 6.0% or less, N: 0.020% or less, Cr: 14.0% to 30%, Nb: more than 0.3% and 1.0% or less, Ti: 0.01 to 0.5%, Mo: 0.3 to 6.0%, Co: 0.01 to 3.0%, Ni: 0.02 to 1.0%, and optionally one or two or more selected from B: 0.0002 to 0.0050%, Zr: 0.005 to 1.0%, V: 0.01 to 1.0%, W: 0.01 to 0.39%, Ca: 0.0002 to 0.0050% and Mg: 0.0002 to 0.0050%, with the balance being Fe and unavoidable impurities, wherein the ferritic stainless steel satisfies the following formulas (1) to (3): Si+Al>2.0% (1) Al—Mn>0% (2) Nb—Ti>0% (3), where the Si, Al, Mn, Nb, and Ti in the formulas (1) to (3) represent the contents, in mass %, of the respective elements.
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Classifications
during manufacturing of plates or strips (C21D8/12 takes precedence) · CPC title
Final recrystallisation annealing · CPC title
Very low carbon steels, i.e. having a carbon content of less than 0,01% · CPC title
with more than 1.5% by weight of manganese · CPC title
with more than 1.5% by weight of silicon · CPC title
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- What does patent US10975459B2 cover?
- Provided is a ferritic stainless steel excellent in oxidation resistance and thermal fatigue resistance. The ferritic stainless steel contains, in mass %, C: 0.020% or less, Si: more than 0.1% and 3.0% or less, Mn: 0.05 to 2.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.3 to 6.0%, N: 0.020% or less, Cr: 12 to 30%, Nb: more than 0.3% and 1.0% or less, Ti: 0.01 to 0.5%, Mo: 0.3 to 6.0%, Co: 0.0…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C38/44. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 13 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).