Chapter 73: Articles of iron or steel

HTS heading 7306: Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel

92 numbered lines under heading 7306, including 68 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 7306
HTS code	Description	Unit	General	Column 2
7306	Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel:
	Line pipe of a kind used for oil or gas pipelines:
7306.11.00	Welded, of stainless steel		Free	10%
7306.11.00.10	With an outside diameter not exceeding 114.3 mm	kg
7306.11.00.50	With an outside diameter exceeding 114.3 mm	kg
7306.19	Other:
7306.19.10	Of iron or nonalloy steel		Free	5.5%
7306.19.10.10	With an outside diameter not exceeding 114.3 mm	kg
7306.19.10.50	With an outside diameter exceeding 114.3 mm	kg
7306.19.51	Of alloy steel		Free	10%
7306.19.51.10	With an outside diameter not exceeding 114.3 mm	kg
7306.19.51.50	With an outside diameter exceeding 114.3 mm	kg
	Casing and tubing of a kind used in drilling for oil or gas:
7306.21	Welded of stainless steel:
	Casing:
7306.21.30.00	Threaded or coupled	kg	Free	28%
7306.21.40.00	Other	kg	Free	8.5%
7306.21.80	Tubing		Free	10%
7306.21.80.10	Imported with coupling	kg
7306.21.80.50	Other	kg
7306.29	Other:
	Casing:
	Of iron or nonalloy steel:
7306.29.10	Threaded or coupled		Free	20%
7306.29.10.30	Imported with coupling	kg
7306.29.10.90	Other	kg
7306.29.20.00	OtherNote: See 9903.90.09.	kg	Free	1%
	Other:
7306.29.31.00	Threaded or coupled	kg	Free	28%
7306.29.41.00	Other	kg	Free	8.5%
	Tubing:
7306.29.60	Of iron or nonalloy steelNote: See 9903.90.09.		Free	5.5%
7306.29.60.10	Imported with coupling	kg
7306.29.60.50	Other	kg
7306.29.81	Other		Free	10%
7306.29.81.10	Imported with coupling	kg
7306.29.81.50	Other	kg
7306.30	Other, welded, of circular cross section, of iron or nonalloy steel:
7306.30.10	Having a wall thickness of less than 1.65 mm		Free	25%
7306.30.10.10	Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit	kg
7306.30.10.90	Other	kg
	Having a wall thickness of 1.65 mm or more:
7306.30.30.00	Tapered steel pipes and tubes principally used as parts of illuminating articles	kg	Free	45%
7306.30.50	OtherNote: See 9903.90.09.		Free	5.5%
7306.30.50.10	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn	kg
7306.30.50.15	Other, cold-drawn	kg
7306.30.50.20	Other, cold-rolled (cold-reduced) with a wall thickness not exceeding 2.54 mm	kg
	Other:
	With an outside diameter not exceeding 114.3 mm:
	Galvanized:
	Imported with coupling:
7306.30.50.26	With an outside diameter not exceeding 50.8 mm	kg
7306.30.50.27	With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm	kg
7306.30.50.28	Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit	kg
	Other:
7306.30.50.31	With an outside diameter not exceeding 50.8 mm	kg
7306.30.50.33	With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm	kg
	Other:
7306.30.50.35	Tube and pipe hollows for redrawing	kg
	Imported with coupling:
7306.30.50.41	With an outside diameter not exceeding 50.8 mm	kg
7306.30.50.43	With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm	kg
	Other:
7306.30.50.56	With an outside diameter not exceeding 50.8 mm	kg
7306.30.50.57	With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm	kg
	With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm:
7306.30.50.85	Galvanized	kg
7306.30.50.90	Other	kg
7306.40	Other, welded, of circular cross section, of stainless steel:
7306.40.10	Having a wall thickness of less than 1.65 mm		Free	36%
	Containing more than 0.5 percent by weight of nickel:
7306.40.10.10	Containing more than 1.5 percent but less than 5 percent by weight of molybdenum	kg
7306.40.10.15	Other	kg
7306.40.10.90	Other	kg
7306.40.50	Having a wall thickness of 1.65 mm or more		Free	11%
7306.40.50.05	Of high-nickel alloy steel	kg
	Other:
7306.40.50.15	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn	kg
	Other, cold-drawn or cold-rolled (cold- reduced):
7306.40.50.40	Containing more than 0.5 percent but less than 24 percent by weight of nickel	kg
	Other:
7306.40.50.42	Containing less than 15 percent by weight of chromium	kg
7306.40.50.44	Other	kg
	Other:
	With an outside diameter not exceeding 114.3 mm:
	Containing more than 0.5 percent but less than 24 percent by weight of nickel:
7306.40.50.62	Containing more than 1.5 percent but less than 5 percent by weight of molybdenum	kg
7306.40.50.64	Other	kg
7306.40.50.80	Other	kg
	With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm:
7306.40.50.85	Containing more than 0.5 percent but less than 24 percent by weight of nickel	kg
7306.40.50.90	Other	kg
7306.50	Other, welded, of circular cross section, of other alloy steel:
7306.50.10.00	Having a wall thickness of less than 1.65 mm	kg	Free	35%
	Having a wall thickness of 1.65 mm or more:
7306.50.30.00	Tapered pipes and tubes of steel principally used as parts of illuminating articles	kg	Free	45%
7306.50.50	Other		Free	10%
7306.50.50.10	Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn	kg
7306.50.50.30	Other, cold-drawn or cold-rolled (cold- reduced)	kg
	Other:
7306.50.50.50	With an outside diameter not exceeding 114.3 mm	kg
7306.50.50.70	With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm	kg
	Other, welded, of noncircular cross section:
7306.61	Of square or rectangular cross section:
	Having a wall thickness of 4 mm or more:
7306.61.10.00	Of iron or nonalloy steel	kg	Free	1%
7306.61.30.00	Of alloy steel	kg	Free	28%
	Having a wall thickness of less than 4 mm:
7306.61.50.00	Of iron or nonalloy steel	kg	Free	25%
7306.61.70	Of alloy steel		Free	35%
7306.61.70.30	Of stainless steel	kg
7306.61.70.60	Other	kg
7306.69	Of other noncircular cross section:
	Having a wall thickness of 4 mm or more:
7306.69.10.00	Of iron or nonalloy steel	kg	Free	1%
7306.69.30.00	Of alloy steel	kg	Free	28%
	Having a wall thickness of less than 4 mm:
7306.69.50.00	Of iron or nonalloy steel	kg	Free	25%
7306.69.70	Of alloy steel		Free	35%
7306.69.70.30	Of stainless steel	kg
7306.69.70.60	Other	kg
7306.90	Other:
7306.90.10.00	Of iron or nonalloy steel	kg	Free	5.5%
7306.90.50.00	Of alloy steel	kg	Free	10%

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.