2.5mm Valve Spring Alloy Steel Round Wire
Chrome-silicon alloy steel round wire 2.5mm for automotive valve springs. HTS 7229.90.50 other alloy steel round wire; high fatigue resistance from alloying below tool steel limits. Oil-tempered condition if basic drawn.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If meets chipper knife steel specs
Specific Cr/V/Mo combinations per note (f) classify as tool steel.
If formed into engine valve springs
Completed valve springs become Chapter 84 engine parts.
If heat-resisting composition
High temperature valve alloys meeting note (g) go to 7228.50.
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Import Tips & Compliance
• Fatigue test data supports alloy spring wire classification
• Distinguish from chrome-vanadium tool spring wire per note (e)
• Supplier heat analysis certificate mandatory for alloy verification
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