4140 Seamless Alloy Steel Tubing
Hot-finished seamless tubing of 4140 chrome-moly alloy steel, wall thickness 2-3 mm, supplied in rounds for mechanical applications. Classified in 7304.90.70.00 due to alloy steel composition and thin walls. Ideal for shafts, axles, and structural components requiring strength.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for cold-drawn carbon steel versions
Cold-formed carbon steel tubes classify under 7304.51 if not alloyed, based on material and forming process.
If imported as finished hydraulic cylinder parts
Assembled cylinders with pistons classify as machinery parts in 8412, not raw tubes.
If suitable for oil/gas drilling
Drill pipe or casing of alloy steel moves to 7304.90.10 regardless of wall thickness.
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Import Tips & Compliance
• Include chemical analysis report specifying chromium/molybdenum content to prove alloy steel status
• Label as 'seamless' on commercial invoice; customs may inspect for weld seams
• Avoid misdeclaration as drill pipe—ensure end-use statement if applicable to prevent anti-dumping scrutiny
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