AISI 8620 Carburizing Steel Rectangular Slab
Low-alloy 8620 steel rectangular semi-finished product for case hardening applications, width controlled <4x thickness. Falls under 7224.90.0045 as other alloy steel primary forms not qualifying as bars. Nickel-chromium-molybdenum content defines alloy steel status.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ≤0.25% carbon content
Very low-carbon alloy steel may classify under specific carbon steel semi-finished headings
If chipper knife steel per note (f)
Exact composition matching chipper knife steel requirements changes subheading
If already formed into tubes/pipes
Any tubular forming moves to Chapter 73 iron/steel articles
Not sure which classification is right?
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Import Tips & Compliance
• Certify Ni-Cr-Mo content meets 8620 specifications; Document intended carburizing use if questioned; Verify no further working per Chapter 72 note definition
Related Products under HTS 7224.90.00.45
AISI 4140 Alloy Steel Rectangular Bloom
A rectangular cross-section semi-finished product made from AISI 4140 chromium-molybdenum alloy steel, with width less than four times the thickness, used for forging into shafts and gears. Classified under HTS 7224.90.0045 as other alloy steel semi-finished products of rectangular shape not meeting rectangular bar criteria. Meets alloy steel definition with added chromium and molybdenum beyond carbon steel limits.
17-4 PH Stainless Steel Square Billet
Precipitation hardening 17-4 PH stainless steel in square cross-section with side length <4x thickness (square), primary form for aerospace components. HTS 7224.90.0045 covers alloy steel semi-finished products where width doesn't reach 4x thickness threshold. Stainless steel qualifies as alloy steel under Chapter 72 definitions.
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AISI 4340 Aircraft Steel Rectangular Billet
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High-Strength Steel Rectangular Semi-Finished
Low-alloy high-strength steel meeting US note (a) minimum yield requirements, rectangular section <4x width ratio. HTS 7224.90.0045 covers such alloy steel primary forms. Used in heavy equipment structural components.
AISI 9310 Gear Steel Square Bloom
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