Alloy Steel Seamless Hollow Profile for Structural Supports
Seamless hollow profile of alloy steel (e.g., AISI 4140) with wall thickness 4 mm or more, used in heavy machinery structural frames. HTS 7304.90.30.00 covers such thick-walled seamless hollow profiles of alloy steel.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded construction
Welded hollow profiles classify under welded sections heading.
If wall thickness under 4 mm
Thin-walled hollow profiles use different subheading.
If finished into structural sections
Machined or fabricated into bars/sections shifts classification.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Define cross-section in docs to confirm 'hollow profile' vs round tube
• Alloy certification critical; 4140 has Cr/Mo for strength
Related Products under HTS 7304.90.30.00
Alloy Steel Seamless Pipe for Oil & Gas Drilling API 5CT L80
Seamless alloy steel pipe (API 5CT L80 grade) with wall thickness ≥4 mm, used in oil and gas well casings and tubing. HTS 7304.90.30.00 applies to its seamless, thick-walled alloy steel construction for high-strength downhole applications.
Chrome-Moly P91 Seamless Pipe for Power Plant Superheaters
Seamless P91 grade (9Cr-1Mo-V) alloy steel pipe, wall ≥4 mm, for superheater tubes in fossil fuel power plants. Fits HTS 7304.90.30.00 as thick-walled seamless alloy steel tube for high-temperature steam service.
Alloy Steel Seamless Tube for Automotive Axle Shafts
Seamless alloy steel tube (e.g., 4340 grade) with ≥4 mm walls for manufacturing heavy-duty axle shafts in trucks. HTS 7304.90.30.00 due to seamless, thick-walled alloy construction prior to machining.
17-4PH Stainless Alloy Seamless Pipe (Alloy Steel Classification)
Seamless 17-4PH precipitation-hardening alloy with wall >4 mm for aerospace and valve bodies. While high Cr, classified as alloy steel tube under HTS 7304.90.30.00 if not meeting stainless criteria in specific contexts.
Alloy Steel Seamless Boiler Tube ASTM A335 P11
This seamless tube made from 1.25% chromium-molybdenum alloy steel (ASTM A335 P11 grade) is designed for high-pressure boiler applications, with a wall thickness exceeding 4 mm. It falls under HTS 7304.90.30.00 as a seamless tube of alloy steel with thick walls, suitable for elevated temperature service in power plants.
ASTM A213 T22 Seamless Alloy Steel Heat-Exchanger Tube
Seamless tube of 2.25% chromium-1% molybdenum alloy steel (ASTM A213 T22) for heat exchangers, featuring wall thickness of 4 mm or more. Classified under HTS 7304.90.30.00 due to its seamless construction, alloy composition, and thick walls for high-temperature fluid transfer.