Heat-Treated 0.45% Carbon Spring Wire
Round wire of nonalloy steel containing 0.45% carbon by weight, heat treated for enhanced tensile strength and elasticity. Used primarily in manufacturing compression and extension springs for automotive suspensions and industrial machinery. Classified under HTS 7217.10.80.10 due to its carbon content between 0.25-0.6%, round shape, and heat treatment without plating or coating.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not heat treated
Untreated round wire with 0.25-0.6% carbon falls under general non-heat-treated category.
If plated or coated
Plated versions, even heat-treated, move to Chapter 72 coated wire headings.
If alloy steel composition
Exceeding nonalloy limits (e.g., added chromium) classifies as alloy steel wire.
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Import Tips & Compliance
• Provide mill test certificates verifying carbon content (0.25-0.6%) and heat treatment process to avoid reclassification
• Declare exact diameter and tensile strength; common pitfall is misstating as cold-drawn without heat treatment
• Check for inadvertent coatings; even light oil may shift to plated categories requiring different documentation
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