Harmonized Tariff Schedule of the United States · HTS code · HS 7304.59
7304.59.20: Other seamless alloy steel tubes: Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
Other seamless alloy steel tubes
Not declarable on its own: use one of its 7 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 7304 Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel:
- Other, of circular cross section, of other alloy steel:
- 7304.59 Other:
- Other:
- 7304.59.20 Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 27 September 2024
- Legal act
- HTSUS 9903.91.01
Subdivisions
- 7304.59.20 Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters Free
- 7304.59.20.30 Of heat-resisting steel kg
- 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
Same subheading in other tariffs
7304.59 Other, of circular cross-section, of other alloy steel: other
UK Free Third-country duty 6 tariff lines 
EU Free Third-country duty 4 tariff lines 
Türkiye Free Third-country duty 7 tariff lines 
Canada Free General (MFN) 37 tariff lines 
Mexico 35% General (MFN) 18 tariff lines 
Brazil 14.4% – 16% General (MFN) 2 tariff lines · average 15.2% 
Argentina 16% General (MFN) 4 tariff lines 
Peru Free General (MFN) 1 tariff line 
New Zealand Free – 5% General (MFN) 7 tariff lines · average 3.6% 
Japan Free General (MFN) 2 tariff lines 
Taiwan Free General (MFN) 2 tariff lines 
GCC 5% General (MFN) 1 tariff line 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 2 tariff lines 
North Macedonia Free General (MFN) 4 tariff lines 
Nigeria 10% – 20% General (MFN) 2 tariff lines · average 15% USA lines: 7304.59
- 7304.59.10Suitable for use in the manufacture of ball or roller bearings
- 7304.59.20Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
- 7304.59.60Other, of circular cross section, of other alloy steel: other, of heat-resisting steel
- 7304.59.80Other, of circular cross section, of other alloy steel: other
Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
Legal notes
HTS code 7304.59.20 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 7304.59 (other, of circular cross-section, of other alloy steel: other).
The general duty is free.
7 statistical sub-lines below it are used in the declaration.
For the same subheading, the UK duty is free, the EU duty is free, the Türkiye duty is free, the Canada duty is free, the Mexico duty is 35%, the Brazil duty is 14.4%–16%, the Argentina duty is 16%, the Peru duty is free, the New Zealand duty is 0%–5%, the Japan duty is free, the Taiwan duty is free, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 10%–20%.
The United States imported goods of subheading 7304.59 worth US$243m in 2024; the largest supplier was China.
Questions and answers
What is the USA import duty for HTS code 7304.59.20?
The general duty in the Harmonized Tariff Schedule of the United States is free. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 7304.59 as a whole, the largest supplier in 2024 was China (US$39m), followed by Austria.