Austenitic stainless steel material, method for manufacturing the same, and hydrogen-using apparatus
By controlling the chemical composition and processing technology of austenitic stainless steel, a large-angle grain boundary structure is formed, solving the problem of balancing hydrogen embrittlement resistance and economy after cold working, and realizing a high-strength and low-cost material for hydrogen equipment.
CN117413082BActive Publication Date: 2026-06-02NIPPON STEEL STAINLESS STEEL CORP
6 Cites 0 Cited by
Patent Information
- Application Number
- CN202280038982.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2021-06-03
- Filing Date
- 2022-06-02
- Publication Date
- 2026-06-02
- Estimated Expiration
- 2042-06-02
AI Technical Summary
Technical Problem
Existing austenitic stainless steel materials cannot achieve a balance between resistance to hydrogen embrittlement and economy after cold working, and the high Cr and N content leads to high costs.
Method used
By controlling the chemical composition and metal structure, the content of elements such as Mn 6.0–20.0%, Ni 4.0–12.0%, and N 0.01–0.30% is ensured, and a large-angle grain boundary structure is formed through solid solution treatment and cold working, thereby improving the resistance to hydrogen embrittlement and the economy.
Benefits of technology
It achieves both high strength and resistance to hydrogen embrittlement in a high-pressure hydrogen environment, while reducing manufacturing costs, making it suitable for hydrogen-related devices.
✦ Generated by Eureka AI based on patent content.
Abstract
An austenitic stainless steel material, wherein a chemical composition of the austenitic stainless steel material is C: 0.20% or less, Si: 2.0% or less, Mn: 6.0 to 20.0%, P: 0.060% or less, S: 0.0080% or less, Cr: 10.0 to 18.0%, Ni: 4.0 to 12.0%, N: 0.01 to 0.30%, Cu: 4.0% or less, Mo: 3.0% or less, arbitrary elements, balance: Fe and impurities, A value is 30.0 to 60.0, and in a metal structure of a surface layer, a proportion of large-angle grain boundaries Gs satisfies [0.1 < Gs < 0.6].
Need to check novelty before this filing date? Find Prior Art