JIS G3461 carbon steel tubes are seamless pipes used in boilers and heat exchangers, offering high strength, thermal stability, and reliable
JIS G3461 is a Japanese Industrial Standard that specifies carbon steel tubes primarily used for high‑temperature heat exchange applications such as boiler tubes, heat exchanger tubes, condenser tubes, smoke tubes, superheater tubes, and air preheater tubes in boiler and industrial systems. These tubes are typically made in seamless and electric resistance welded (ERW) forms and are available in grades like STB340, STB410, and STB510, each offering distinct mechanical strength levels to suit various operating demands. JIS G3461 tubes deliver good weldability, reliable performance at elevated temperatures, and efficient heat transfer, making them suitable for industrial boilers, petrochemical heat exchangers, and other thermal systems. However, they are not recommended for low‑temperature services.