4140 Alloy Steel Seamless Round Tube for Hydraulic Cylinders
Seamless 4140 chrome-moly alloy steel tube, wall thickness 4-10 mm, precision bored for hydraulic cylinder barrels. Classified in HTS 7304.90.30.00 for seamless thick-walled alloy tubes used in heavy equipment.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded 4140 equivalents
Welded alloy tubes for hydraulics under 7306.30.
If machined into complete cylinder
Fully fabricated cylinders are machinery parts.
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Import Tips & Compliance
• Hone finish specs in invoices; still tubes if not fully machined
• Confirm 4140 alloy (0.8-1.1% Cr, 0.15-0.25% Mo)
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