Chapter 73: Articles of iron or steel

HTS heading 7304: Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel

171 numbered lines under heading 7304, including 139 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.

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HTS heading 7304
HTS code	Description	Unit	General	Column 2
7304	Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel:
	Line pipe of a kind used for oil or gas pipelines:
7304.11.00	Of stainless steel		Free	35%
7304.11.00.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.11.00.50	Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm	kg
7304.11.00.80	Having an outside diameter exceeding 406.4 mm	kg
7304.19	Other:
7304.19.10	Of iron or nonalloy steelNote: See 9903.90.09.		Free	25%
7304.19.10.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.19.10.30	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm:
7304.19.10.45	Having a wall thickness less than 12.7 mm	kg
7304.19.10.60	Having a wall thickness of 12.7 mm or more	kg
7304.19.10.80	Having an outside diameter exceeding 406.4 mm	kg
7304.19.50	Of other alloy steel		Free	35%
7304.19.50.20	Having an outside diameter not exceeding 114.3 mm	kg
7304.19.50.50	Having an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm	kg
7304.19.50.80	Having an outside diameter exceeding 406.4 mm	kg
	Casing, tubing and drill pipe, of a kind used in drilling for oil or gas:
7304.22.00	Drill pipe of stainless steel		Free	35%
	Having an outside diameter not exceeding 168.3 mm:
7304.22.00.30	Having a wall thickness not exceeding 9.5 mm	kg
7304.22.00.45	Having a wall thickness exceeding 9.5 mm	kg
7304.22.00.60	Having an outside diameter exceeding 168.3 mm	kg
7304.23	Other drill pipe:
7304.23.30.00	Of iron or nonalloy steel	kg	Free	25%
7304.23.60	Of alloy steel		Free	35%
	Having an outside diameter not exceeding 168.3 mm:
7304.23.60.30	Having a wall thickness not exceeding 9.5 mm	kg
7304.23.60.45	Having a wall thickness exceeding 9.5 mm	kg
7304.23.60.60	Having an outside diameter exceeding 168.3 mm	kg
7304.24	Other, of stainless steel:
	Casing:
7304.24.30	Threaded or coupled		Free	28%
	Having an outside diameter less than 215.9 mm:
7304.24.30.10	Having a wall thickness less than 12.7 mm	kg
7304.24.30.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.24.30.30	Having a wall thickness less than 12.7 mm	kg
7304.24.30.40	Having a wall thickness of 12.7 mm or more	kg
7304.24.30.45	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm	kg
7304.24.30.80	Having an outside diameter exceeding 406.4 mm	kg
7304.24.40	OtherNote: See 9903.90.09.		Free	8.5%
	Having an outside diameter less than 215.9 mm:
7304.24.40.10	Having a wall thickness less than 12.7 mm	kg
7304.24.40.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.24.40.30	Having a wall thickness less than 12.7 mm	kg
7304.24.40.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.24.40.50	Having a wall thickness less than 12.7 mm	kg
7304.24.40.60	Having a wall thickness of 12.7 mm or more	kg
7304.24.40.80	Having an outside diameter exceeding 406.4 mm	kg
7304.24.60	Tubing		Free	35%
	Having an outside diameter not exceeding 114.3 mm:
7304.24.60.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.24.60.30	Having a wall thickness exceeding 9.5 mm	kg
7304.24.60.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.24.60.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.24.60.75	Having an outside diameter exceeding 406.4 mm	kg
7304.29	Other:
	Casing:
	Of iron or nonalloy steel:
7304.29.10	Threaded or coupledNote: See 9903.90.09.		Free	20%
	Having an outside diameter less than 215.9 mm:
7304.29.10.10	Having a wall thickness less than 12.7 mm	kg
7304.29.10.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.10.30	Having a wall thickness less than 12.7 mm	kg
7304.29.10.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.10.50	Having a wall thickness less than 12.7 mm	kg
7304.29.10.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.10.80	Having an outside diameter exceeding 406.4 mm	kg
7304.29.20	OtherNote: See 9903.90.09.		Free	1%
	Having an outside diameter less than 215.9 mm:
7304.29.20.10	Having a wall thickness less than 12.7 mm	kg
7304.29.20.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.20.30	Having a wall thickness less than 12.7 mm	kg
7304.29.20.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.20.50	Having a wall thickness less than 12.7 mm	kg
7304.29.20.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.20.80	Having an outside diameter exceeding 406.4 mm	kg
	Of other alloy steel:
7304.29.31	Threaded or coupledNote: See 9903.90.09.		Free	28%
	Having an outside diameter less than 215.9 mm:
7304.29.31.10	Having a wall thickness less than 12.7 mm	kg
7304.29.31.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.31.30	Having a wall thickness less than 12.7 mm	kg
7304.29.31.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.31.50	Having a wall thickness less than 12.7 mm	kg
7304.29.31.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.31.80	Having an outside diameter exceeding 406.4 mm	kg
7304.29.41	OtherNote: See 9903.90.09.		Free	8.5%
	Having an outside diameter less than 215.9 mm:
7304.29.41.10	Having a wall thickness less than 12.7 mm	kg
7304.29.41.20	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter of 215.9 mm or more but not exceeding 285.8 mm:
7304.29.41.30	Having a wall thickness less than 12.7 mm	kg
7304.29.41.40	Having a wall thickness of 12.7 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.29.41.50	Having a wall thickness less than 12.7 mm	kg
7304.29.41.60	Having a wall thickness of 12.7 mm or more	kg
7304.29.41.80	Having an outside diameter exceeding 406.4 mm	kg
	Tubing:
7304.29.50	Of iron or nonalloy steelNote: See 9903.90.09.		Free	25%
	Having an outside diameter not exceeding 114.3 mm:
7304.29.50.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.29.50.30	Having a wall thickness exceeding 9.5 mm	kg
7304.29.50.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.29.50.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.29.50.75	Having an outside diameter exceeding 406.4 mm	kg
7304.29.61	Of other alloy steel		Free	35%
	Having an outside diameter not exceeding 114.3 mm:
7304.29.61.15	Having a wall thickness not exceeding 9.5 mm	kg
7304.29.61.30	Having a wall thickness exceeding 9.5 mm	kg
7304.29.61.45	Having an outside diameter exceeding 114.3 mm but less than 215.9 mm	kg
7304.29.61.60	Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm	kg
7304.29.61.75	Having an outside diameter exceeding 406.4 mm	kg
	Other, of circular cross section, of iron or nonalloy steel:
7304.31	Cold-drawn or cold-rolled (cold-reduced):
7304.31.30.00	Hollow bars	kg	Free	22%
7304.31.60	OtherNote: See 9903.90.09.		Free	25%
7304.31.60.10	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.31.60.50	Other	kg
7304.39.00	OtherNote: See 9903.90.09.		Free	25%
	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters:
7304.39.00.02	Having an outside diameter less than 38.1 mm	kg
7304.39.00.04	Having an outside diameter of 38.1 mm or more but less than 190.5 mm	kg
7304.39.00.06	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm	kg
7304.39.00.08	Having an outside diameter exceeding 285.8 mm	kg
	Other:
7304.39.00.16	Galvanized, having an outside diameter not exceeding 114.3 mm	kg
	Other:
7304.39.00.20	Having an outside diameter less than 38.1 mm	kg
	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm:
7304.39.00.24	Having a wall thickness less than 6.4 mm	kg
7304.39.00.28	Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm	kg
7304.39.00.32	Having a wall thickness exceeding 12.7 mm	kg
	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm:
7304.39.00.36	Having a wall thickness less than 12.7 mm	kg
7304.39.00.40	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.44	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm:
7304.39.00.48	Having a wall thickness less than 12.7 mm	kg
7304.39.00.52	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.56	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.39.00.62	Having a wall thickness less than 12.7 mm	kg
7304.39.00.68	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.39.00.72	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 406.4 mm:
7304.39.00.76	Having a wall thickness less than 19 mm	kg
7304.39.00.80	Having a wall thickness of 19 mm or more	kg
	Other, of circular cross section, of stainless steel:
7304.41	Cold-drawn or cold-rolled (cold-reduced):
7304.41.30	Of an external diameter of less than 19 mm		Free	36%
7304.41.30.05	Of high-nickel alloy steel	kg
	Other:
7304.41.30.15	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.41.30.45	Other	kg
7304.41.60	Other		Free	36%
7304.41.60.05	Of high-nickel alloy steel	kg
	Other:
7304.41.60.15	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.41.60.45	Other	kg
7304.49.00	Other		Free	36%
7304.49.00.05	Of high-nickel alloy steel	kg
	Other:
7304.49.00.15	Hollow bars	kg
	Other:
7304.49.00.45	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters	kg
7304.49.00.60	Other	kg
	Other, of circular cross section, of other alloy steel:
7304.51	Cold-drawn or cold-rolled (cold-reduced):
7304.51.10.00	Suitable for use in the manufacture of ball or roller bearings	kg	Free	34%
7304.51.50	Other		Free	35%
7304.51.50.05	Of high-nickel alloy steel	kg
	Other:
	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters:
7304.51.50.15	Of heat-resisting steel	kg
7304.51.50.45	Other	kg
7304.51.50.60	Other	kg
7304.59	Other:
7304.59.10.00	Suitable for use in the manufacture of ball or roller bearings	kg	Free	34%
	Other:
7304.59.20	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters		Free	35%
7304.59.20.30	Of heat-resisting steel	kg
	Other:
7304.59.20.40	Having an outside diameter less than 38.1 mm	kg
7304.59.20.45	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm	kg
7304.59.20.55	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm	kg
7304.59.20.60	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm	kg
7304.59.20.70	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm	kg
7304.59.20.80	Having an outside diameter exceeding 406.4 mm	kg
	Other:
7304.59.60.00	Of heat-resisting steel	kg	Free	36%
7304.59.80	Other		Free	35%
7304.59.80.10	Having an outside diameter less than 38.1 mm	kg
	Having an outside diameter of 38.1 mm or more but not exceeding 114.3 mm:
7304.59.80.15	Having a wall thickness less than 6.4 mm	kg
7304.59.80.20	Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm	kg
7304.59.80.25	Having a wall thickness exceeding 12.7 mm	kg
	Having an outside diameter exceeding 114.3 mm but less than 190.5 mm:
7304.59.80.30	Having a wall thickness less than 12.7 mm	kg
7304.59.80.35	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.40	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm:
7304.59.80.45	Having a wall thickness less than 12.7 mm	kg
7304.59.80.50	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.55	Having a wall thickness of 19 mm or more	kg
	Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm:
7304.59.80.60	Having a wall thickness less than 12.7 mm	kg
7304.59.80.65	Having a wall thickness of 12.7 mm or more but less than 19 mm	kg
7304.59.80.70	Having a wall thickness of 19 mm or more	kg
7304.59.80.80	Having an outside diameter exceeding 406.4 mm	kg
7304.90	Other:
	Having a wall thickness of 4 mm or more:
7304.90.10.00	Of iron or nonalloy steel	kg	Free	1%
7304.90.30.00	Of alloy steel	kg	Free	8.5%
	Having a wall thickness of less than 4 mm:
7304.90.50.00	Of iron or nonalloy steel	kg	Free	25%
7304.90.70.00	Of alloy steel	kg	Free	35%

Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.

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Source: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.