U.S. imports of Steel Investment Castings (NAICS 331512) totaled $17.7M in August 2026, imported from 46 countries.
Importers of Steel Investment Castings paid $8.1M in duties in August 2026, an average duty rate of 46.59% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataProduced by the lost-wax (investment casting) process, steel castings in NAICS 331512 achieve dimensional tolerances and surface finishes unattainable by sand casting, making them indispensable for aerospace turbine components, defense hardware, oil and gas valve bodies, and medical implant structures. The process accommodates a wide range of steel alloys — carbon, low-alloy, stainless, and heat-resistant grades — allowing engineers to specify mechanical properties precisely. Because many steel investment castings serve defense and aerospace end uses, importers may encounter Export Administration Regulations (EAR) or ITAR considerations on the buyer side, and should verify whether the casting's alloy and application trigger any controlled-article review.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
910 import shipments a month
Steel investment castings span carbon steel, low-alloy steel, martensitic and austenitic stainless steels, and high-temperature nickel-bearing grades. HTS classification of the finished casting depends primarily on the article's function and metal composition — stainless steel castings, for example, fall under different HTS provisions than carbon steel castings. Importers should confirm the alloy composition on the mill certificate and match it to the correct HTS chapter to avoid misclassification.
Steel investment castings that meet the definition of a 'steel article' under the Section 232 proclamations — generally articles with steel as the component of chief value — are subject to Section 232 tariffs unless a product exclusion has been granted. Importers should review the Commerce Department's Section 232 product exclusion database and consult a licensed customs broker to determine whether a specific casting and country of origin combination carries Section 232 exposure.
National industry 2 of 2 in naics industry 33151
National industry 331512 · $17.7M of $99.4M
Imports · August 2026
origin
China and India together supply 63% of it. China pays 62.0% duty; United Kingdom 0.6%.
customs district
Census does not publish district detail for this classification system.
destination
Census publishes state breakdowns for NAICS to the 4-digit level only. See NAICS 3315 for those.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$17.7MYoY · free account
Exports
$14.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $210.7M of Steel Investment Castings and exported $152.8M.
Through August 2026. Source: U.S. Census Bureau.
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