Core Viewpoint - The hydrogen energy industry, particularly in the storage and transportation segment, is crucial for connecting production and application, with liquid hydrogen storage gaining significant attention due to its technical advantages [3][4]. Summary by Sections Advantages of Liquid Hydrogen Storage - High transportation efficiency with low sensitivity to distance in transportation costs - Wide application scenarios, catering to high-end fields like semiconductors and aerospace, as well as long-distance transport for heavy trucks and ships - Potential for large-scale application, showcasing large storage capacity, fast filling speed, and small footprint when utilized on a large scale [3]. Challenges in Industrialization - Technical challenges include insufficient domestic production rates of core equipment, such as the need for improved adiabatic efficiency in turbine expanders and the current status of vehicle-mounted liquid hydrogen tanks being in the engineering prototype stage - High investment costs for liquid hydrogen plants, with electricity costs accounting for about 70% of total liquefaction costs, limiting expansion into the civilian market - Incomplete standard systems, with existing national standards for liquid hydrogen but lacking comprehensive testing bases and certification systems [4]. Recent Developments in Liquid Hydrogen Sector 1. **Panzhihua Liquid Hydrogen Demonstration Project**: The main equipment for this project, led by the Aerospace Science and Technology Group, has been successfully transported, marking a new era for liquid hydrogen's full industrial chain demonstration in the Sichuan-Chongqing region [4]. 2. **Jiuquan Steel's Special Steel for Liquid Hydrogen Storage**: The S31603 (JLH) austenitic stainless steel plate has passed technical evaluations, suitable for extreme low-temperature environments [5]. 3. **CNOOC Engineering's Low-Temperature Liquid Hydrogen Tank**: This tank has received AIP certification, featuring advanced insulation structures and achieving industry-leading evaporation rates [6]. 4. **20m³ Liquid Hydrogen Tank by Aerospace Six Academy**: Successfully developed with advanced vacuum insulation technology, ensuring safety and efficiency [7]. 5. **Jiangsu Heng Hydrogen's Large-Scale Liquid Hydrogen Storage Project**: This project, with a total investment of 500 million yuan, aims to produce 100 sets of large-scale liquid hydrogen storage and transportation equipment annually [8]. 6. **First Domestic Liquid Hydrogen Production and Storage Demonstration Project**: This project aims to establish a comprehensive solution for liquid hydrogen, enhancing commercialization efforts [9][12]. 7. **Liquid Hydrogen Technology Alliance Formation**: This alliance aims to develop technical specifications and address key challenges in liquid hydrogen technology [13][14]. 8. **Successful Test Flight of a Ton-Class Liquid Hydrogen Drone**: This marks a significant breakthrough in liquid hydrogen applications, validating the feasibility of the liquid hydrogen supply system [15].

Core Viewpoint - The hydrogen energy industry is experiencing rapid growth, driven by the global transition to clean energy and the urgent demand for special steel materials for liquid hydrogen storage [3][4]. Group 1: Company Developments - Hongxing Co., Ltd. has developed a new type of austenitic stainless steel plate (S31603) for ultra-low temperature pressure vessels, which has passed technical evaluation by the China Special Equipment Inspection and Research Institute [2][5]. - The successful development of S31603 (JLH) stainless steel plate fills a technological gap in the northwest region of China and addresses the scarcity of materials for ultra-low temperature applications in the hydrogen energy sector [9]. Group 2: Technical Achievements - The S31603 (JLH) stainless steel plate exhibits excellent plasticity, impact toughness, and fracture toughness at -269°C, with low hydrogen embrittlement sensitivity, meeting the stringent requirements for liquid hydrogen/liquid helium pressure vessels [5][7]. - The material has been certified for a thickness range of 5-60mm and a temperature range of -269 to 100°C, making it suitable for manufacturing ultra-low temperature storage equipment [7]. Group 3: Industry Implications - The advancements in ultra-low temperature materials are expected to promote the domestic production of hydrogen energy technologies and support China's clean energy transition and carbon neutrality goals [9].