Steam turbines and other vapor turbines — HTS 8406
Steam turbines and other vapor turbines, and parts thereof
Chapter 84 › Heading 8406
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 8406 is a four-digit product category for steam turbines and other vapor turbines, along with their parts. It generally covers machines that convert the energy of expanding steam or another vapor into rotary motion, as well as identifiable parts designed for those turbines. The heading is broader than the final import classification: it groups related products before the tariff schedule separates them into more specific subheadings.
To reach the correct 8-digit HTSUS code, start with the product’s actual identity and function, then follow the subheadings under heading 8406. The schedule may distinguish complete turbines from parts and may further divide products by characteristics such as turbine type, output or configuration, or the material and design of a part. Do not choose a code based only on a commercial name; review the legal wording, section and chapter notes, and any applicable classification rules.
What to check
- Confirm whether the item is a complete steam or vapor turbine, an accessory, or a part identifiable for use with a turbine.
- Describe the machine’s working medium, operating design, and principal function; keep technical specifications and product literature available.
- For parts, verify whether the part is specifically designed for or principally used with the turbine and whether another heading describes it more specifically.
- Compare every available 8-digit option under heading 8406 and match the wording to the item’s type, construction, and other listed characteristics.
- Check the current HTSUS, relevant notes, and—when the classification is uncertain—ask a customs broker or seek a binding classification decision from CBP.
HTS heading 8406 summary
Steam turbines and other vapor turbines is a 4-digit product category containing 0 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 8406.10 | Turbines for marine propulsion |
| 8406.90 | Parts |
Common questions
What products fall under HTS heading 8406?
Steam turbines and other vapor turbines, and parts thereof. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.