What special materials are used to build a nuclear submarine?

Nuclear submarines are constructed using specialized materials to withstand extreme pressures and provide durability. High-strength steel, often in the form of HY-80 or HY-100, is commonly used for the hull to ensure resilience against deep-sea conditions. Additionally, special alloys and composites are utilized for components like the reactor and propulsion systems, while radiation-shielding materials, such as lead or polyethylene, help protect the crew from nuclear radiation. Advanced insulation materials are also employed to minimize noise and maintain thermal efficiency.