Martensitic stainless steel material
US12428712B2 · kind B2 · utility
0Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2021 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Oct 1, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A martensitic stainless steel material according to the present disclosure contains, in mass %, C: 0.030% or less, Ni: 5.05 to 7.50%, Cr: 10.00 to 14.00%, and Mo: 1.50 to 3.50%, and has a yield strength of 758 MPa or more, and on two line segments LS of 1000 μm extending in a wall thickness direction with arbitrary two points as a center located at positions at a depth of 2 mm from the inner surface, a degree of Cr segregation ΔCr defined by Formula (1) and a degree of Mo segregation ΔMo defined by Formula (2) satisfy Formula (3): ΔCr=([Cr*]max−[Cr*]min)/[Cr*]ave (1)ΔMo=([Mo*]max−[Mo*]min)/[Mo*]ave (2)ΔCr+ΔMo≤0.59 (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.