Austenitic stainless steel material
The austenitic stainless steel material with a balanced chemical composition and stabilized austenite structure addresses the challenge of achieving high strength and hydrogen embrittlement resistance, ensuring effective performance in high-pressure hydrogen environments.
EP4768615A1Pending Publication Date: 2026-07-01NIPPON STEEL CORPORATION
Patent Information
- Authority / Receiving Office
- EP Β· EP
- Patent Type
- Applications
- Current Assignee / Owner
- NIPPON STEEL CORPORATION
- Filing Date
- 2024-08-23
- Publication Date
- 2026-07-01
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Abstract
An austenitic stainless steel material that has high strength and has excellent hydrogen embrittlement resistance in a high-pressure hydrogen gas environment is provided. An austenitic stainless steel material of the present disclosure has a chemical composition consisting of, in mass%, C: 0.100% or less, Si: 1.000% or less, Mn: 8.00 to 20.00%, P: 0.050% or less, S: 0.0050% or less, Cr: 18.00 to 30.00%, Ni: 10.00 to 25.00%, N: 0.700 to 1.000%, V: 0.010 to 0.200%, Nb: 0.010 to 0.300%, Al: 0.200% or less, and O: 0.0100% or less, with the balance being Fe and impurities, in which Fnl defined by Formula (1) in the description is 18.0 or more when the content of Ni is less than 17.00% and is 22.0 or more when the content of Ni is 17.00% or more.
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