HS code · 6-digit subheading

HS Code 8455.90 – Metal-rolling mills; parts thereof

HS code 8455.90 is the 6-digit subheading for metal-rolling mills, parts thereof. It is used for mill stands, gearboxes, bearings, chocks and guides.

What HS 8455.90 covers

This category encompasses all other parts and accessories for metal-rolling mills, excluding the specialized rolls covered under 845530. It includes a vast array of components from gearboxes, bearings, chocks, and guides to control systems, hydraulic units, and cooling systems. The trade in these parts is crucial for the maintenance, repair, and upgrade of existing rolling mill infrastructure worldwide, ensuring continuous operation in steel, aluminum, and other metal industries. Importers are typically metal producers, maintenance contractors, and engineering firms, while exporters are specialized engineering firms and original equipment manufacturers (OEMs). The market is driven by the need for operational efficiency, technological upgrades, and extending the lifespan of expensive mill equipment. Accurate classification is vital for managing supply chains and ensuring the smooth operation of global metal production facilities.

Covers
  • Mill stands
  • Gearboxes
  • Bearings
  • Chocks
  • Guides
  • Hydraulic cylinders
  • Cooling systems
  • Lubrication systems
  • Control panels
Examples
  • SKF bearings for mills
  • Siemens mill automation
  • Rexroth hydraulic systems
  • Danieli spare parts
  • Primetals Technologies components

Codes often confused with 8455.90

Common mistake. Can be confused with 845530 if the parts are not clearly rolls, or with general industrial machinery parts (e.g., 8483 for transmission components) if not specifically designed for rolling mills.

8455.30Metal-rolling mills; rolls thereof84.83Transmission shafts (including cam and crank) and cranks; bearing housings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers; flywheels and pulleys; clutches and shaft couplings

Top exporters and importers of HS code 845590, 2025

In 2025, the largest exporter of HS code 845590 in UN Comtrade data was China, with 36% of world exports; the largest importer in UN Comtrade data was the United States, with 17% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 China $967M
  2. 2 Italy $596M
  3. 3 Germany $216M

World total: $2.7B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $431M
  2. 2 India $279M
  3. 3 Russia* ~$213M

World total: $2.5B Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM code for 8455.90

Brazil does not split HS 8455.90: its NCM code is 8455.90.00.

  1. 8455.90.00 Other parts of metal-rolling millsOutras partes

All Brazil NCM codes in heading 84.55 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 8455.90

What is HS code 845590?

HS code 845590 is a 6-digit subheading in the Harmonized System that covers: Metal-rolling mills; parts thereof. This category encompasses all other parts and accessories for metal-rolling mills, excluding the specialized rolls covered under 845530. It includes a vast array of components from gearboxes, bearings, chocks, and guides to control systems, hydraulic units, and cooling systems. The trade in these parts is crucial for the maintenance, repair, and upgrade of existing rolling mill infrastructure worldwide, ensuring continuous operation in steel, aluminum, and other metal industries. Importers are typically metal producers, maintenance contractors, and engineering firms, while exporters are specialized engineering firms and original equipment manufacturers (OEMs). The market is driven by the need for operational efficiency, technological upgrades, and extending the lifespan of expensive mill equipment. Accurate classification is vital for managing supply chains and ensuring the smooth operation of global metal production facilities.

What products fall under HS code 845590?

Mill stands, gearboxes, bearings, chocks, guides, hydraulic cylinders, cooling systems, lubrication systems, control panels

What are common misclassifications for HS code 845590?

Can be confused with 845530 if the parts are not clearly rolls, or with general industrial machinery parts (e.g., 8483 for transmission components) if not specifically designed for rolling mills.

Which countries are the top exporters of goods under HS code 845590?

In 2025, the top exporters of HS code 845590 in UN Comtrade data were China ($967M, 36% of world exports), Italy ($596M) and Germany ($216M). World exports came to about $2.7B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of goods under HS code 845590?

In 2025, the top importers of HS code 845590 in UN Comtrade data were the United States ($431M, 17% of world imports), India ($279M) and Russia (about $213M). World imports came to about $2.5B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

How is HS code 845590 structured?

HS code 845590 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (55) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 845590?

In Brazil, HS code 845590 is NCM 8455.90.00. The last two digits are 00 because Brazil does not split this HS code further.