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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If width 4x thickness or more
Qualifies as rectangular bar rather than bloom when width-to-thickness ratio meets or exceeds 4:1
If not alloy steel (≤10% total alloying elements)
Falls under semi-finished products of carbon steel if alloy content doesn't qualify as 'other alloy steel'
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Import Tips & Compliance
• Provide mill test certificate confirming alloy composition meets AISI 4140 specs; Ensure dimensions verify width <4x thickness ratio; Declare exact cross-sectional dimensions on entry documents to avoid reclassification
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