Girth welded joint of steel pipe
US-2024353033-A1 · Oct 24, 2024 · US
Stainless steel product
US10822679B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10822679-B2 |
| Application number | US-201515513595-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 30, 2015 |
| Priority date | Oct 1, 2014 |
| Publication date | Nov 3, 2020 |
| Grant date | Nov 3, 2020 |
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- Title
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- Abstract
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Abstract
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Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al2O3 inclusions constitute an area fraction of 0.02% or less. This stainless steel product has excellent corrosion resistance to hot concentrated sulfuric acid of approximately 93 to 99% concentration, for example, and also is economically advantageous.
First claim
Opening claim text (preview).
The invention claimed is: 1. A stainless steel product comprising a chemical composition consisting of, by mass, C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0.001 to 0.01%, and balance Fe and impurities, wherein MgO.Al 2 O 3 inclusions constitute an area fraction of 0.010% or more, 0.02% or less. 2. The stainless steel product according to claim 1 , wherein the MgO.Al 2 O 3 inclusions have an average particle size of 5.0 μm or less.
Assignees
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Classifications
Handling in a vacuum · CPC title
Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence) · CPC title
Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle · CPC title
Removing impurities by adding a treating agent · CPC title
containing rare earths, i.e. Sc, Y, Lanthanides · CPC title
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- What does patent US10822679B2 cover?
- Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al2O3 inclusions constitute an area fraction of 0.…
- Who is the assignee on this patent?
- Nippon Steel & Sumitomo Metal Corp, Nippon Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C38/48. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 03 2020 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).