52100 Tool Steel Round 15mm
Cold-finished 52100 chrome steel bar (1% C, 1.5% Cr—note e(ii)), 15mm, bearing race stock but tool-qualified. Under 7228.50.10.40 for tool steel cold-formed <18mm.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ball-bearing steel
Note (h) composition directs to specific other-worked subheading.
If generic alloy, not tool
Insufficient alloy elements for tool steel definition.
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Import Tips & Compliance
• 52100 dual-use; prove tool steel via note (e) not ball-bearing note (h)
• Low sulfur/phos specs must match exactly for tool status
• Bearing end-use doesn't change classification—material/process governs
Related Products under HTS 7228.50.10.40
D2 Tool Steel Round Bar 12mm
Cold-finished round bar made from D2 tool steel, a high-carbon, high-chromium alloy steel with approximately 1.5% carbon and 12% chromium, used for making punches and dies. It falls under HTS 7228.50.10.40 as a tool steel bar (per U.S. note (e) definition ii), cold-formed or cold-finished, with maximum cross-sectional dimension under 18 mm, and not high-speed steel. The bar is supplied in straight lengths without further surface working beyond cold-finishing.
O1 Tool Steel Flat Bar 10x15mm
Cold-rolled flat bar of O1 oil-hardening tool steel (0.9% C, 1% Mn, 5% Cr equivalent per note e(iii)), max dimension 15mm, for toolmaking and gauges. Classified under 7228.50.10.40 as cold-finished tool steel bar under 18mm, not high-speed. No further working beyond cold-finishing.
A2 Tool Steel Square Bar 14mm
Cold-drawn square bar from A2 air-hardening tool steel (1% C, 5% Cr), max cross-section 14mm, used for shear blades and punches. HTS 7228.50.10.40 applies to this cold-finished tool steel (note e(ii)), under 18mm, other than high-speed.
S7 Tool Steel Round Bar 16mm
Cold-finished round bar of S7 shock-resisting tool steel (0.5% C, 3.25% Cr, 1.4% Mo per note e(v)), 16mm diameter, for impact tools. Fits 7228.50.10.40: tool steel, cold-formed, <18mm cross-section.
CPM-M4 Tool Steel Flat Stock 8x20mm
Precision-ground but cold-finished flat stock of CPM-M4 tool steel (1.4% C, 4% Cr, 4% V—note e(i)/(ii)), max 20mm but effective cross-section <18mm, for wear parts. 7228.50.10.40 as other tool steel bars cold-formed.
H13 Tool Steel Round Bar 10mm
Cold-drawn H13 hot-work tool steel bar (0.4% C, 5% Cr, 1.3% Mo—borderline note e), 10mm diameter for die inserts. HTS 7228.50.10.40: cold-finished tool steel <18mm.