AISI 4140 Chrome-Moly Hollow Bar
Seamless hollow profile of 4140 alloy steel used as mechanical tubing, 165 mm OD, 9.5 mm wall thickness. Fits HTS 7304.59.80.30 as 'hollow profiles, seamless, of other alloy steel' with specified circular dimensions and thin wall.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of other non-alloy steel
Non-alloy steel (low carbon) seamless tubes use 7304.39 heading instead of alloy-specific 7304.59.
If imported as machinery part, not stock material
Finished parts for specific machines (e.g., hydraulic cylinders) may classify under machinery chapters by use.
If wall thickness 12.7 mm or greater
Thicker-walled versions of same pipe stay in 7304.59 but different statistical breakout.
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Import Tips & Compliance
• Label as 'alloy steel' with grade marking; customs may test for alloy elements if documentation lacks
• Ensure no weld seams visible on ultrasonic testing report to prove seamless nature
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