Of alloy steel
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel: > Other: > Having a wall thickness of less than 4 mm: > Of alloy steel
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Products classified under HTS 7304.90.70.00
17-4PH Seamless Alloy Precision Tube
17-4PH stainless alloy seamless precision tube, 0.9 mm wall for medical device shafts. Ultra-thin wall alloy steel seamless under HTS 7304.90.70.00. Mirror polish interior finish.
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.
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.
Alloy Steel Instrument Tubing
Precision seamless alloy steel tubing (e.g., 316L stainless alloy equivalent), wall <1 mm, for pressure/temperature instruments. Under 7304.90.70.00 for thin-wall seamless alloy profiles. Used in gauges, sensors, and control systems.
42CrMo4 Seamless Alloy Tube
EN 42CrMo4 grade seamless alloy steel tube, 3 mm wall, for European machinery OEMs. Seamless hollow profile of alloy steel <4 mm wall qualifies for 7304.90.70.00. Quench and temper for wear resistance.
15-5PH Stainless Alloy Seamless Tube
15-5PH precipitation hardening stainless alloy seamless tube, 2.8 mm wall, for aerospace actuators. Alloy steel hollow profile with thin walls under HTS 7304.90.70.00. High strength-to-weight ratio.
Alloy Steel Furniture Frame Tube
Seamless 4130 alloy tube, 1.2 mm wall, oval profile for modern furniture legs/frames. Thin-wall seamless alloy steel hollow profile per 7304.90.70.00. Corrosion resistant finish available.
Alloy Steel Hydraulic Cylinder Tube
Seamless tube made of alloy steel, such as 4140 grade, with wall thickness under 4 mm, used in manufacturing hydraulic and pneumatic cylinders. It falls under HTS 7304.90.70.00 as a seamless hollow profile of alloy steel with thin walls. These tubes are precision-honed inside for piston rod sealing.
Alloy Steel Bicycle Frame Tube
Seamless thin-wall (1.5-3 mm) tubes of 4130 alloy steel, butted design for lightweight bicycle frames. Fits HTS 7304.90.70.00 as seamless alloy steel hollow profiles with walls <4 mm. Commonly used in high-end road and mountain bike construction.
Alloy Steel Shock Absorber Tube
Seamless 1.65 mm wall alloy steel tube for motorcycle and automotive shock absorbers. Thin-wall seamless alloy steel profile per HTS 7304.90.70.00. Honed bore for smooth piston operation.