A specialty functional material engineered for nuclear safety operating conditions. Produced from low-carbon austenitic stainless steels such as 316L and 304L via clean melting and multi-pass cold rolling, it features low impurity content, uniform grain structure, and good resistance to irradiation swelling and stress corrosion cracking. Its reduced gauge (typically ≤0.1 mm) supports the fabrication of precision components including nuclear fuel cladding, control rod guide tubes, heat exchanger fins, and sealing gaskets. It maintains structural integrity and sealing reliability under high temperature, high pressure, and intense radiation, serving as an important foundational material for nuclear equipment R&D.