HS code · 2-digit chapter
HS Code 84 – Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof
What HS 84 covers
HS Chapter 84, titled 'Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof,' is one of the most extensive and complex chapters in the Harmonized System, encompassing a vast array of industrial, commercial, and domestic mechanical equipment. This chapter is fundamental to global manufacturing, infrastructure development, and technological advancement. Its scope includes engines, pumps, compressors, heating and cooling apparatus, lifting and handling equipment, agricultural machinery, machine tools, automatic data processing machines (computers), and various other mechanical appliances designed for specific functions. The boundaries are crucial: it generally covers machines where the primary function is mechanical, differentiating them from primarily electrical machines (Chapter 85), vehicles (Chapter 87), or specialized optical/medical instruments (Chapter 90). The classification of 'parts thereof' is particularly intricate, requiring careful analysis to determine if a part is identifiable solely for use with a specific machine within the chapter or is a general-purpose component. Correct classification under Chapter 84 is paramount for trade compliance, directly impacting applicable duty rates, eligibility for trade agreement benefits, and adherence to import/export controls, especially for dual-use technologies or nuclear-related items. Misclassification can lead to severe penalties, supply chain disruptions, and loss of competitive advantage. Historically, trade in Chapter 84 goods has underpinned industrial revolutions and continues to drive global economic growth, reflecting advancements in automation, energy efficiency, and digital transformation. Major headings range from nuclear reactors (8401) and internal combustion engines (8407) to pumps (8413), air conditioning machines (8415), industrial robots (8479), and semiconductor manufacturing equipment (8486).
- Covers
- Internal combustion piston engines
- Centrifugal pumps
- Industrial air compressors
- Household refrigerators
- Dishwashers
- Washing machines
- Filtering machinery for beverages
- Forklifts
- Excavators
- Combine harvesters
- Industrial printing presses
- 3D printers
- CNC milling machines
- Automatic data processing machines (laptops, servers, tablet PCs)
- Industrial robots
- Automated packaging machines
- Semiconductor manufacturing equipment
- Steam turbines
- Nuclear reactor fuel elements
- Hydraulic presses
- Injection molding machines
- Textile looms
- Paper-making machines
- Industrial ovens
- Heat exchangers
- Wind turbine mechanical parts
- Coffee makers (industrial).
- Examples
A German company exports high-precision CNC milling machines (8457.10) to a new automotive manufacturing plant in the United States, leveraging the transatlantic trade routes and often requiring specialized freight services due to size and weight. A Chinese manufacturer ships thousands of automatic data processing machines (laptops, 8471.30) to various distributors across Europe, utilizing efficient sea freight routes and navigating EU customs regulations. An American agricultural equipment producer exports advanced combine harvesters (8433.51) to farmers in Brazil, a trade route often involving specific financing arrangements and agricultural technology transfer programs. A Japanese multinational corporation exports sophisticated semiconductor lithography equipment (8486.20) to a new fabrication facility in Taiwan, a high-value, high-tech trade flow critical for the global electronics supply chain and subject to stringent export controls. A Danish firm provides large-scale industrial wind turbine gearboxes (8483.40) to a wind farm project in Australia, necessitating complex logistics for oversized cargo and adherence to local energy infrastructure development policies.
Headings in chapter 84 86
Codes often confused with 84
Common mistake. Common classification errors in Chapter 84 often involve distinguishing between primarily mechanical and primarily electrical functions. For instance, an electric water heater for industrial use might be mistakenly classified under 8419 (machinery for treating materials by temperature change) instead of 8516 (electric instantaneous or storage water heaters) if the heating element is the dominant feature. Another frequent mistake is confusing a specialized machine in Chapter 84 with a 'machine having individual functions' under 8479, or even a general electrical apparatus in Chapter 85. For example, an ultrasonic cleaning machine might be erroneously placed in 8479 when its primary function is better described by a more specific heading or if its main operating principle is electrical (e.g., 8543 for electrical machines having individual functions). Lastly, parts classification can be tricky: a part identifiable solely for a machine in Chapter 84 belongs there, but a general-purpose electrical component (e.g., a motor) might fall under Chapter 85, leading to misclassification if its primary use is not specific to an 84 machine.
Top exporters and importers of HS code 84, 2025
In 2025, the largest exporter of HS code 84 in UN Comtrade data was China, with 18% of world exports; the largest importer in UN Comtrade data was the United States, with 20% 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 China $603.8B 18% of world exports
- 2 Taiwan* ~$286.7B 8.6% of world exports · partner records ↗
- 3 Germany $285.7B 8.6% of world exports
World total: $3.32T Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $665.1B 20% of world imports
- 2 China $251.2B 7.5% of world imports
- 3 Germany $190.1B 5.7% of world imports
World total: $3.35T 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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.
Questions about HS 84
What is HS code 84?
HS code 84 is a 2-digit chapter in the Harmonized System that covers: Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof. HS Chapter 84, titled 'Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof,' is one of the most extensive and complex chapters in the Harmonized System, encompassing a vast array of industrial, commercial, and domestic mechanical equipment. This chapter is fundamental to global manufacturing, infrastructure development, and technological advancement. Its scope includes engines, pumps, compressors, heating and cooling apparatus, lifting and handling equipment, agricultural machinery, machine tools, automatic data processing machines (computers), and various other mechanical appliances designed for specific functions. The boundaries are crucial: it generally covers machines where the primary function is mechanical, differentiating them from primarily electrical machines (Chapter 85), vehicles (Chapter 87), or specialized optical/medical instruments (Chapter 90). The classification of 'parts thereof' is particularly intricate, requiring careful analysis to determine if a part is identifiable solely for use with a specific machine within the chapter or is a general-purpose component. Correct classification under Chapter 84 is paramount for trade compliance, directly impacting applicable duty rates, eligibility for trade agreement benefits, and adherence to import/export controls, especially for dual-use technologies or nuclear-related items. Misclassification can lead to severe penalties, supply chain disruptions, and loss of competitive advantage. Historically, trade in Chapter 84 goods has underpinned industrial revolutions and continues to drive global economic growth, reflecting advancements in automation, energy efficiency, and digital transformation. Major headings range from nuclear reactors (8401) and internal combustion engines (8407) to pumps (8413), air conditioning machines (8415), industrial robots (8479), and semiconductor manufacturing equipment (8486).
What products fall under HS code 84?
Internal combustion piston engines, centrifugal pumps, industrial air compressors, household refrigerators, dishwashers, washing machines, filtering machinery for beverages, forklifts, excavators, combine harvesters, industrial printing presses, 3D printers, CNC milling machines, automatic data processing machines (laptops, servers, tablet PCs), industrial robots, automated packaging machines, semiconductor manufacturing equipment, steam turbines, nuclear reactor fuel elements, hydraulic presses, injection molding machines, textile looms, paper-making machines, industrial ovens, heat exchangers, wind turbine mechanical parts, coffee makers (industrial).
What are common misclassifications for HS code 84?
Common classification errors in Chapter 84 often involve distinguishing between primarily mechanical and primarily electrical functions. For instance, an electric water heater for industrial use might be mistakenly classified under 8419 (machinery for treating materials by temperature change) instead of 8516 (electric instantaneous or storage water heaters) if the heating element is the dominant feature. Another frequent mistake is confusing a specialized machine in Chapter 84 with a 'machine having individual functions' under 8479, or even a general electrical apparatus in Chapter 85. For example, an ultrasonic cleaning machine might be erroneously placed in 8479 when its primary function is better described by a more specific heading or if its main operating principle is electrical (e.g., 8543 for electrical machines having individual functions). Lastly, parts classification can be tricky: a part identifiable solely for a machine in Chapter 84 belongs there, but a general-purpose electrical component (e.g., a motor) might fall under Chapter 85, leading to misclassification if its primary use is not specific to an 84 machine.
Which countries are the top exporters of goods under HS code 84?
In 2025, the top exporters of HS code 84 in UN Comtrade data were China ($603.8B, 18% of world exports), Taiwan (about $286.7B) and Germany ($285.7B). World exports came to about $3.32T, 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 84?
In 2025, the top importers of HS code 84 in UN Comtrade data were the United States ($665.1B, 20% of world imports), China ($251.2B) and Germany ($190.1B). World imports came to about $3.35T, 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 84 structured?
HS code 84 is a 2-digit chapter code in the Harmonized System maintained by the World Customs Organization. It represents a broad category of goods and contains multiple 4-digit headings and 6-digit subheadings for more specific classifications.