Of heat-resisting steel
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other, of circular cross section, of other alloy steel: > Other: > Other: > Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters > Of heat-resisting steel
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.59.20.30
RA333 Furnace Tube
Seamless RA333 heat-resisting steel tube for refining furnaces, enduring carburizing atmospheres and temperatures up to 1800°F. Used in petrochemical heat exchangers. 7304.59.20.30 applies for its alloy steel composition, seamless circular form, and furnace suitability.
310 Stainless Boiler Tube
Seamless 310 stainless steel tube certified heat-resisting for boiler tubes in high-temperature service. Resists scaling in superheaters and feedwater heaters. Fits HTS 7304.59.20.30 as other alloy steel (heat-resisting), seamless, circular, boiler-suitable.
Alloy 20 Feedwater Heater Tube
Seamless Alloy 20 tube for feedwater heaters in power plants, corrosion-resistant in chloride environments at elevated temperatures. Suitable for heat exchangers. Classified 7304.59.20.30 for heat-resisting properties, seamless construction, and specified equipment use.
253MA Heat Exchanger Tube
Seamless 253MA austenitic steel tube for heat exchangers in boilers, with nitrogen-enhanced heat resistance up to 2000°F. Used in refining applications. 7304.59.20.30 due to heat-resisting alloy, circular seamless profile, heat exchanger suitability.
AL-6XN Condenser Tube
Seamless AL-6XN super-austenitic tube for seawater condensers and heat exchangers, offering pitting resistance at high temperatures. For power and refining. Meets 7304.59.20.30 as heat-resisting seamless alloy steel tube for condensers.
Haynes 230 Superheater Tube
Seamless Haynes 230 nickel-chromium alloy tube for gas turbine superheaters and industrial boilers. Exceptional high-temperature strength. 7304.59.20.30 classification for heat-resisting steel, seamless, circular, superheater use.
Hastelloy C-276 Heat Exchanger Tube
Seamless Hastelloy C-276 tube engineered for corrosive heat exchanger environments in chemical processing plants. It resists high temperatures and aggressive media in condensers and refining furnaces. Fits 7304.59.20.30 as a seamless, circular cross-section tube of heat-resisting alloy steel suitable for heat exchangers.
Alloy 625 Superheater Tube
Seamless Alloy 625 tube for superheaters in power generation boilers, offering exceptional oxidation resistance at elevated temperatures. Used in feedwater heaters and refining furnaces. Classified in 7304.59.20.30 for its heat-resisting steel composition, seamless circular profile, and boiler/superheater suitability.
Inconel 600 Condenser Tube
Seamless Inconel 600 tube for condensers in steam power plants, providing superior resistance to steam and high-heat corrosion. Ideal for heat exchangers in refining operations. Meets 7304.59.20.30 criteria as heat-resisting alloy steel, seamless, circular, and designed for condensers.
Incoloy 800 Boiler Tube
Seamless tube made from Incoloy 800 alloy steel, designed for high-temperature applications in industrial boilers. Its heat-resisting properties allow it to withstand extreme temperatures and corrosive environments in superheaters and steam generators. Classified under 7304.59.20.30 due to its seamless construction, circular cross-section, and suitability for boilers made of heat-resisting steel.