8411.99.10 - Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery

This HTS category, 8411.99.10, specifically classifies cast-iron parts for gas turbines and turbojets that have undergone minimal processing. The key defining characteristic here is the limited nature of the finishing. Goods are only considered for classification under this heading if they have been cleaned and machined solely for the removal of imperfections such as fins, gates, sprues, and risers, or to prepare them for subsequent machining processes. The material composition, specifically cast iron, is a critical factor.

This classification distinguishes itself from its sibling, 8411.99.90 ("Other"), which would cover cast-iron parts that have undergone further processing beyond the basic finishing described herein. If a cast-iron part exhibits more advanced machining, fabrication, or other modifications, it would fall under the broader "Other" category. This category is designed to isolate parts that are in an early stage of manufacturing, requiring significant further work before becoming functional components of a turbine.

The subcategories beneath 8411.99.10 further refine the classification based on the application of the turbine. Goods may be differentiated as either "Parts of nonaircraft gas turbines" or "Parts of aircraft gas turbines." This distinction is crucial for determining applicable duties and regulatory requirements, reflecting the different standards and usages associated with each type of turbine.