AISI 4140 Alloy Steel Round Billet
AISI 4140 is a chromium-molybdenum alloy steel billet used for forging shafts and gears, supplied in semi-finished round form with diameters typically 100-300mm. It falls under HTS 7224.90.00 as a semi-finished product of other alloy steel (not stainless), distinct from stainless in chapter 7221 or high-strength/specialty steels defined in notes. These primary forms require further hot working like rolling or forging.
Import Duty Rates by Country of Origin
More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing at least 10.5% chromium
Qualifies as semi-finished stainless steel under Chapter 72 note, shifting from 'other alloy' to stainless heading.
If not alloy steel (total alloying elements under 10%)
Falls to semi-finished iron or non-alloy steel if composition doesn't meet alloy steel threshold.
If hot-rolled into bars over 80mm diameter
Advances beyond semi-finished stage to hot-rolled alloy steel products in heading 7228.
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Import Tips & Compliance
• Provide mill test certificates verifying alloy composition (e.g
• Cr 0.8-1.1%, Mo 0.15-0.25%) to confirm 'other alloy steel' status; ensure no further working like polishing per chapter note
• Common pitfall: incorrect declaration as stainless steel leading to chapter 7221 duties
Related Products under HTS 7224.90.00
AISI 8630 Low Alloy Billet
AISI 8630 Ni-Cr-Mo low-alloy steel billets for weldable structures and pipes. Classified in 7224.90.00 semi-finished other alloy steel.
AISI 4340 Chromium-Molybdenum Steel Slab
AISI 4340 alloy steel slabs for aerospace forgings and high-stress components, typically 200-400mm thick in rectangular form. Classified in 7224.90.00 as semi-finished other alloy steel, not meeting tool steel or high-strength definitions in U.S. notes, intended for hot rolling into plates.
EN24 Alloy Steel Bloom
EN24 (817M40) nickel-chromium-molybdenum alloy steel bloom, square cross-section over 150mm, used for heavy-duty gears and axles. HTS 7224.90.00 covers this semi-finished other alloy steel, excluding stainless, tool, or ball-bearing steels per chapter notes.
AISI 8620 Case-Hardening Steel Billet
Low-alloy AISI 8620 carburizing steel billets for gears and pinions, Ni-Cr-Mo composition. Fits 7224.90.00 as semi-finished other alloy steel, not further worked and excluding specialty types like razor blade or chipper knife steel.
AISI 4130 Seamless Pipe Billet
Chromoly AISI 4130 steel billets specifically for piercing into seamless tubing used in aircraft and oilfield applications. Under 7224.90.00 as other semi-finished alloy steel products, primary form before extrusion.
SCM440 Japanese Alloy Steel Bloom
JIS SCM440 (similar to 4140) alloy steel bloom for machine structural use, Cr-Mo composition. HTS 7224.90.00 for semi-finished other alloy, not heat-resisting or universal mill plate per notes.