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.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
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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