# United States tariff line 7304.31.60.10: Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters

> In the United States tariff, line 7304.31.60.10 covers other, of circular cross section, of iron or nonalloy steel, cold-drawn or cold-rolled (cold-reduced), suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 7304.31 in heading 73.04 (chapter 73).

Source: https://border.bot/countries/united-states/hs-codes/7304316010
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 73](https://border.bot/countries/united-states/hs-codes/73) / [7304.31](https://border.bot/countries/united-states/hs-codes/730431) / [7304.31.60.10](https://border.bot/countries/united-states/hs-codes/7304316010)

## Key facts

- Tariff line: 7304.31.60.10
- Covers: Other, of circular cross section, of iron or nonalloy steel, cold-drawn or cold-rolled (cold-reduced), suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [7304.31](https://border.bot/hs-codes/730431)

## What this line covers

In the United States tariff, line 7304.31.60.10 covers other, of circular cross section, of iron or nonalloy steel, cold-drawn or cold-rolled (cold-reduced), suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters.

Its legal text is “Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters”, read under “Other, of circular cross section, of iron or nonalloy steel”, “Cold-drawn or cold-rolled (cold-reduced)” and “Other”.

## How it is structured

It falls under HS subheading 7304.31 in heading 73.04 (chapter 73). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 73: Articles of iron or steel
- Heading 73.04: Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel
- Subheading 7304.31: Other, of circular cross section, of iron or nonalloy steel
- Within the subheading: Cold-drawn or cold-rolled (cold-reduced)
- Within the subheading: Other
- Line 7304.31.60.10: Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 7304.31.60.

## In other countries

No other national tariff on border.bot has live lines under 7304.31 yet.

- [The Harmonized System text for 7304.31](https://border.bot/hs-codes/730431)

## Other lines under 7304.31

- [7304.31.30.00](https://border.bot/countries/united-states/hs-codes/7304313000) Hollow bars
- [7304.31.60.50](https://border.bot/countries/united-states/hs-codes/7304316050) Other

- Previous line: [7304.31.30.00](https://border.bot/countries/united-states/hs-codes/7304313000) Hollow bars
- Next line: [7304.31.60.50](https://border.bot/countries/united-states/hs-codes/7304316050) Other

## Frequently asked questions

### What does tariff line 7304.31.60.10 cover in the United States tariff?

In the United States tariff, line 7304.31.60.10 covers other, of circular cross section, of iron or nonalloy steel, cold-drawn or cold-rolled (cold-reduced), suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters.

### What is the general (MFN) duty on 7304.31.60.10 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 7304.31.60.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/7304316010.json