60mm OD x 25mm Wall 9Cr-1Mo Alloy Tube
Grade 91 (9Cr-1Mo-V) seamless alloy tube, 60mm OD x 25mm wall, for advanced supercritical boilers. HTS 7304.59.80.25 classification applies to its heavy wall thickness and alloy steel seamless construction. Critical for next-generation power plant efficiency.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If semi-finished or not further worked
Rough-turned or hollow bloom products classify under Chapter 72 bars/tubes.
If imported as boiler components
Fabricated tube sections may classify as parts of steam generating boilers.
Not sure which classification is right?
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Import Tips & Compliance
• Grade 91 requires normalization + temper heat treatment certification for customs acceptance
• Distinguish from P91 welding consumables which classify differently
• High value requires detailed cost breakdown to prevent undervaluation claims
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