The not-elsewhere-specified (NES) ferrous scrap category captures iron and steel secondary materials that do not fit the more precisely defined grades — stainless, alloy, tinned, or machining byproducts — covered by adjacent SITC headings. In practice, this residual category often includes mixed or contaminated scrap, obsolete scrap from demolition, and other heterogeneous ferrous streams whose alloy content or form prevents classification in a more specific heading. Accurate sorting and documentation are essential, as misclassification of higher-value alloy scrap into this catch-all category — or vice versa — can result in duty discrepancies or trade-remedy exposure.

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