17-4 PH Precipitation Hardening Stainless Steel Spring Wire
17-4 PH (precipitation hardening) alloy steel wire designed for high-strength springs and fasteners, with copper and niobium additions. Falls under HTS 7229.90.90.00 as other alloy steel wire not fitting tool steel or ball-bearing steel definitions in U.S. notes. Typically 0.5-5mm diameter, heat-treatable for aerospace applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If tool steel per U.S. note (e)
Specific tool steel compositions shift to heading 7228, excluding them from 7229 'other alloy steel'.
If of free-cutting steel
Alloy steel wire with lead or sulfur additions for machinability classified separately under 7229.30.
If sold as welded rings or spirals
Further worked into shapes like welded rings moves to Chapter 73 tubes/pipes/sections.
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Import Tips & Compliance
• Certify exact chemical composition via heat analysis to confirm 'other alloy steel' status; declare condition (annealed or aged) accurately for valuation; segregate from tool steel shipments to prevent commingling errors
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