321 Stainless Steel Welded Cold-Reduced Tube 4-inch Sch 10
Welded cold-reduced tube of 321 stabilized stainless steel, 4-inch nominal pipe size Schedule 10 (wall ~2.8 mm), ~9-12% nickel. Fits 7306.40.50.40 as circular stainless welded pipe, cold-formed, mid-nickel range. Suited for high-temperature exhaust systems.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hot-formed rather than cold-reduced
Hot-finished welded pipes classify separately from cold-drawn.
If produced seamless
Seamless construction moves to 7304 regardless of nickel or process.
If for food processing machinery use
Specific end-use in machines may reclassify under Chapter 84/85.
Not sure which classification is right?
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Import Tips & Compliance
• Certify stabilization treatment (titanium addition) but confirm nickel via spectrometry
• Use NAFTA/USMCA certificates if qualifying for preferential treatment on stainless
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