Alloy 625 Refining Furnace Tube
Alloy 625 refining furnace tubes, cold-drawn and seamless, made of heat-resisting nickel-chromium-molybdenum steel. Designed for pyrolysis furnace coils in oil refineries, these tubes withstand carburization and high-temperature cracking. They are classified under tariff item 7304.51.00 as cold-drawn seamless tubes of other alloy steel.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +50.0% | 50% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If nickel content exceeds 50% by weight
Nickel alloy tubes are classified under Chapter 75.
If the tubes are not cold-finished
Hot-finished seamless tubes of other alloy steel.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the tube is cold-drawn and seamless, with a mill certificate
• Verify the alloy composition to ensure it qualifies as other alloy steel
• Check if the tubes meet Canadian boiler and pressure vessel codes, as this may affect CBSA clearance
Related Products under Tariff item 7304.51.00
AL-6XN Cold-Drawn Pipe
Cold-drawn seamless pipe made from AL-6XN super-austenitic high-nickel alloy steel, designed for desalination plants. The circular cross-section and cold-drawing process provide excellent corrosion resistance in chloride-rich environments. This product falls under tariff item 7304.51.00 as a seamless tube of other alloy steel, cold-drawn or cold-rolled.
Alloy 20 Cold-Rolled Seamless Tube
Cold-rolled seamless tube made from Alloy 20 (Carpenter 20) high-nickel alloy steel, designed for sulfuric acid handling in chemical plants. The circular cross-section and cold-rolling process provide excellent resistance to acid corrosion. This product is classified under tariff item 7304.51.00 as a seamless tube of other alloy steel, cold-drawn or cold-rolled.
Alloy 625 Cold-Drawn Seamless Tube
Cold-drawn seamless tube made from Alloy 625 (Inconel 625) high-nickel alloy steel, designed for aerospace and nuclear applications. The circular cross-section and cold-drawing process provide exceptional strength and corrosion resistance at high temperatures. This product falls under tariff item 7304.51.00 as a seamless tube of other alloy steel, cold-drawn or cold-rolled.
Alloy Steel Cold-Drawn Tapered Bearing Tube
Cold-drawn seamless alloy steel tube with a slight taper, designed for tapered roller bearing races. Its circular cross-section and cold-drawn finish qualify it under tariff item 7304.51.00 as a cold-drawn or cold-rolled tube of other alloy steel.
Cold-Drawn 17-4 PH Stainless Steel Capillary Tube
Ultra-precise seamless cold-drawn capillary tubing from 17-4 precipitation hardening stainless alloy steel, with a circular cross-section for medical instruments. This cold-drawn alloy steel tube qualifies under tariff item 7304.51.00.
Cold-Drawn 316 Stainless Steel Hydraulic Tube
Seamless cold-drawn tube made from 316 alloy steel with a circular cross-section, used in high-pressure hydraulic systems. This cold-formed hollow profile of other alloy steel falls under tariff item 7304.51.00.