Chromoly 4130 Seamless Round Tube
4130 chromoly seamless tube with 0.083 inch (2.1 mm) wall thickness, in 1-inch diameter, for automotive roll cages and chassis. HTS 7304.90.70.00 applies to its alloy steel seamless thin-wall profile. Heat-treatable for high tensile strength.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cut/bent for vehicle body construction
Processed tubes for vehicle chassis classify as parts of bodies in 8708.
If wall thickness of 4 mm or more
Subheading splits strictly by wall thickness threshold.
If considered hollow bar rather than tube
Hollow bars for machining into tubes classify under Chapter 72 bars, not Chapter 73 tubes.
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Import Tips & Compliance
• MTC must list exact alloy grade (e.g
• 4130) with percentages of Cr, Mo to substantiate alloy classification
• Confirm wall thickness via caliper measurements in entry docs; variances can trigger audits
• Not for pressure service? Include end-use declaration to avoid pipeline tariffs
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