1.35 mm Valve Spring Steel Wire
High-carbon valve spring wire (0.65% C), 1.35 mm round uncoated, patented for engine valve springs. Fatigue-resistant for high-RPM applications. HTS 7217.10.80.75 matches carbon content, diameter, and nonalloy uncoated status.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-formed into valve springs
Engine-specific formed springs become Chapter 87 parts.
If chrome-silicon alloy
Valve spring alloys typically use silicon additions, moving to alloy headings.
If other shapes like flattened
Non-round valve wire profiles classify under heading 7215.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Engine manufacturer specs and fatigue test data support classification
• Distinguish from suspension spring wire which may have different certifications
• Customs may require decarburization layer measurements
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