Nitrided Alloy Steel Mandrel Bar Tube
Surface-nitrided 4340 alloy steel hollow mandrel bars used in tube drawing operations. 7306.90.5000 for specialized alloy steel hollow profiles in metalworking.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If unfinished hot-rolled
Prior to nitriding, may remain Chapter 72 flat-rolled products.
If iron, not alloy steel
Base iron hollow bars use separate iron subheading.
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Import Tips & Compliance
• Nitriding depth/process documentation essential for surface treatment valuation
• Declare as 'hollow mandrel bar', not solid bar to prevent reclassification
• Industrial end-use certificates prevent consumer goods scrutiny
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