Standard International Trade Classification
U.S. imports of Parts for Electric Industrial or Laboratory Furnaces, Ovens & Heating Equipment (SITC 74135) totaled $43.5M in August 2026, imported from 53 countries.
Importers of Parts for Electric Industrial or Laboratory Furnaces, Ovens & Heating Equipment paid $2.1M in duties in August 2026, an average duty rate of 5.56% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Parts for Electric Industrial or Laboratory Furnaces, Ovens & Heating Equipment imports of $43.5M in August 2026 ran 53% above the year-to-date monthly average of $28.4M.
Last updated: August 2026 dataHeating elements, refractory liners, electrode assemblies, control modules, and other components destined for electric industrial or laboratory furnaces and ovens are consolidated under this parts heading, which spans the full range of electric thermal equipment covered by the adjacent complete-unit headings. Accurate classification requires establishing that the part is principally designed for electric furnace or oven use, as many components—such as thermocouples, refractory bricks, or power controllers—are also used in non-furnace applications and could be classified elsewhere. Section 301 tariffs on Chinese-origin goods may apply to certain parts, and the applicable rate can differ from that on the complete furnace, making a line-by-line tariff review worthwhile for high-volume spare-parts procurement.
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790 import shipments a month
Graphite electrodes have their own dedicated HTS classification and are generally not classified as furnace parts, even when their end use is exclusively in electric arc furnaces. The principal-use rule does not override a specific tariff provision for the article itself. Importers should confirm the correct heading for electrodes separately from the furnace parts heading and consult a customs broker if the electrode is a novel form or composite material.
Software transmitted electronically is generally not subject to customs duties as an imported 'good,' but physical media (e.g., a programmed control board or firmware chip) imported as a replacement part for a furnace control system would be classified based on the physical article. A replacement control board designed solely for a specific furnace model would typically fall under this parts heading, while a general-purpose industrial computer would not.
Basic heading 244 of 642 in section 7
Basic heading 74135 · $43.5M of $172.0B
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Imports · August 2026
origin
Japan and Germany together supply 61% of it. South Korea pays 12.4% duty; Mexico <0.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$43.5MYoY · free account
Exports
$39.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $309.6M of Parts for Electric Industrial or Laboratory Furnaces, Ovens & Heating Equipment.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.