Chromoly 4140 Seamless Hydraulic Tubing
Seamless 4140 alloy steel tubing with OD under 38.1 mm for hydraulic cylinders in heavy machinery. Classified under HTS 7304.59.80.10 as other seamless alloy steel tubes of small circular diameter.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If electric resistance welded
Welded hydraulic tubes of alloy steel classify under 7306 welded pipes.
If imported as finished cylinder barrel
Precision machined into complete hydraulic cylinders, becomes machinery parts.
If made from carbon steel
Non-alloy steel hydraulic tubing uses different subheading 7304.29.
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
• Specify exact wall thickness for strength calculations; include NDT (non-destructive testing) reports; watch for minimum wall thickness requirements
Related Products under HTS 7304.59.80.10
Seamless Alloy Steel Hypodermic Tubing
Precision seamless tubes of alloy steel with outside diameter under 38.1 mm, used in manufacturing hypodermic needles for medical syringes. Classified under HTS 7304.59.80.10 due to seamless construction, circular cross-section, alloy steel material, and small diameter specification. These tubes meet the chapter definition of seamless hollow profiles.
Alloy Steel Capillary Tubing for Instrumentation
Small-diameter seamless alloy steel tubes (OD <38.1 mm) used in pressure gauges and sensors for industrial instrumentation. Falls under HTS 7304.59.80.10 as seamless, circular cross-section hollow profiles of other alloy steel with specified small diameter.
Seamless 4130 Alloy Steel Tubing for Aerospace
High-strength seamless tubes of 4130 chromoly alloy steel, OD less than 38.1 mm, used in aircraft hydraulic lines and structural components. Classified in 7304.59.80.10 for seamless alloy steel pipes of circular section and small diameter.
Small Diameter Alloy Steel Boiler Tubes
Seamless alloy steel tubes (OD <38.1 mm) designed for high-pressure boiler applications in power plants. Meets HTS 7304.59.80.10 criteria: seamless, circular, other alloy steel, small diameter.
Alloy Steel Seamless Needle Tubing
Ultra-precise seamless alloy steel tubes (OD <38.1 mm) for knitting machine needles and precision instruments. Fits HTS 7304.59.80.10: seamless circular hollow profiles of other alloy steel, small diameter.
Grade 4340 Small Diameter Seamless Tubing
High-tensile 4340 alloy steel seamless tubes under 38.1 mm OD for automotive roll cages and suspension components. Classified HTS 7304.59.80.10 for other alloy steel seamless pipes.