AL-6XN Super Austenitic Heat Exchanger Tube
Super austenitic AL-6XN welded stainless tubes for extreme corrosion heat exchangers, wall ≥1.65 mm. High PREN for halide service. Classified HTS 7306.40.50.15 heat exchanger tubes.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-stainless super alloys
Super alloys without stainless chromium use alloy steel headings.
If <1.65 mm wall thickness
Thin-wall super duty tubes use adjacent provisions.
If chemical processing filter equipment parts
Specialized corrosion tubes for filtering machinery use Chapter 84.
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Import Tips & Compliance
• Document PREN >40 confirming super austenitic classification
• Specify process fluid corrosivity levels
• Confirm tariff shift rules for substantial transformation
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