8406.90.70.00 - Blades, rotating or stationary

This HTS subheading, 8406.90.70.00, specifically covers blades designed for steam turbines and other vapor turbines, regardless of whether they are rotating or stationary. These components are critical to the function of turbines, converting the energy of steam or vapor into rotational mechanical power. The classification is inclusive of blades in various states of finishing, provided they are not further processed beyond what is defined in the sibling categories.

It is important to distinguish this category from its siblings. Subheading 8406.90.50.00 is reserved for rotors that are finished and ready for final assembly into a turbine. Similarly, 8406.90.60.00 covers rotors that have undergone only basic cleaning or machining for the removal of excess material or to prepare them for further finishing processes. This category, 8406.90.70.00, focuses solely on the blades themselves, which are distinct components from the rotor assembly.

As this subheading is a leaf node within the HTS database, it does not have further subcategories. Therefore, the classification of any turbine blade will fall directly under this description if it does not meet the specific criteria for rotors defined in the preceding sibling subheadings. The key determining factor for classification here is the identification of the component as a turbine blade, separate from the rotor structure.