Silico-Manganese Steel Spring Wire
High-carbon silico-manganese steel wire designed for compression and extension springs in automotive suspensions. It qualifies under HTS 7229.20.00.90 as other silico-manganese alloy steel wire, leveraging the alloy's fatigue resistance. Silicon content aids in heat treatment for optimal spring properties.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in rod form before drawing to wire
Undrawn rods or bars of silicon-manganese spring steel are classified under 7228 as semi-finished products.
If cold-formed or cold-headed
Wire subjected to cold-forming operations for springs moves to the specific cold-worked subheading.
If tool steel grade
Silico-manganese wire meeting tool steel element criteria per U.S. note (e) reclassifies to tool steel provisions.
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Import Tips & Compliance
• Submit detailed alloy analysis confirming silicon-manganese specs per chapter notes; declare exact diameter to match statistical reporting; watch for cold-heading processes that shift to 7229.30
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