Welded Alloy Steel Square Hollow Section
ERW welded square hollow structural section (HSS) from alloy steel grades like A500 or A513, used in construction frameworks and machine bases. Fits 7306.90.5000 as other hollow profiles of alloy steel, distinct from circular pipes.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stainless steel rectangular
Stainless hollow sections have dedicated subheadings separate from general alloy steel.
If over 16mm wall thickness
Thicker-walled structures may classify as fabricated steel articles, not tubes/pipes.
If cast iron alloy
Cast hollow profiles use Chapter 73 iron castings headings.
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Import Tips & Compliance
• Provide welding process certification (ERW vs spiral) and yield strength data for structural compliance
• Declare cross-sectional shape and wall thickness accurately to differentiate from Chapter 73 bars
• Avoid undervaluation by specifying alloy premium over base steel pricing
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