Steel material for high-pressure hydrogen gas environment, steel structure for high-pressure hydrogen gas environment, and methods for producing steel material for high-pressure hydrogen gas environment
US12351896B2 · kind B2 · utility
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Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | May 7, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A steel material and methods for producing the same. The steel material exhibits excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment and is, therefore, suitable for use in hydrogen storage tanks, hydrogen line pipes, and the like. The steel material has a specified chemical composition, a tensile strength of 560 MPa or higher, and a fracture toughness value KIH exhibited by the steel material in a high-pressure hydrogen gas atmosphere is 40 MPa·m1/2 or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.