The national standard "GB/T 44148.3-2024 Steel Forging, Rolling or Forging Steel Bars for Pressure Equipment, Part 3: Low Temperature Toughness Nickel Steel" specifies the technical requirements for low temperature toughness nickel steel, including order content, size, shape, weight and technical requirements, etc. It is suitable for hot-rolled and forged bars with a diameter not greater than 50mm to ensure the toughness and Reliability of the material under low temperature conditions. The standard details the test methods, inspection rules and requirements for Encasement, marking and mass certificate, which are essential to guarantee the safe operation and performance of pressure equipment. The standard will be implemented on January 1, 2025.