AISI 52100 Ball-Bearing Steel Hot-Rolled Coil
Hot-rolled bars and rods in irregularly wound coils made from ball-bearing steel conforming to the precise chemical composition specified in HTS Chapter 72 note (h), including 0.95-1.13% carbon and 1.25-1.65% chromium. These are not tempered, not treated, and not partly manufactured, used primarily for manufacturing high-precision ball bearings. Classified under 7227.90.1030 due to their specific alloy composition meeting the ball-bearing steel definition and hot-rolled coil form.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cold-rolled instead of hot-rolled
Cold-rolled bars/rods of alloy steel shift to Chapter 72 heading 7228, even if same ball-bearing composition.
If alloy steel but not meeting precise ball-bearing steel composition
Fails Chapter 72 note (h) requirements, falls into other tool steel categories under 7227.90.60.
If classified as high-speed steel rather than ball-bearing steel
High-speed steels have distinct alloy specs and move to 7225.50 for hot-rolled irregular coils.
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Import Tips & Compliance
• Provide mill test certificates confirming exact chemical composition meets Chapter 72 note (h) for ball-bearing steel to avoid reclassification
• Document that material is not tempered, treated, or partly manufactured; any heat treatment voids this classification
Related Products under HTS 7227.90.10.30
100Cr6 Ball-Bearing Steel Hot-Rolled Coil Rod
DIN 100Cr6 specification hot-rolled bars/rods in wound coils of ball-bearing steel per HTS note (h), with tight controls on carbon, chromium, and tramp elements for bearing raceways. Delivered not tempered or partly manufactured. 7227.90.1030 designation for this specific tool steel subcategory.
GCr15 Ball-Bearing Steel Hot-Rolled Rod Coil
Hot-rolled rods in irregularly wound coils of GCr15 grade ball-bearing steel, matching US note (h) with controlled carbon (0.95-1.13%), low sulfur/phosphorus, and chromium content for superior bearing performance. Supplied not tempered or treated for subsequent bearing ring manufacturing. HTS 7227.90.1030 applies specifically to this untreated tool steel subcategory.
SUJ2 Ball-Bearing Alloy Steel Hot Coil
Japanese SUJ2 grade hot-rolled steel bars and rods in irregular coils, precisely engineered to US Chapter 72 note (h) ball-bearing steel specs for minimal impurities and optimal hardness after processing. Not further worked, tempered, or treated. Used in automotive and industrial bearing production; classified 7227.90.1030.
52100 Modified Ball-Bearing Steel Coil
Modified 52100 grade hot-rolled irregular coil steel bars/rods meeting exact ball-bearing steel composition of Chapter 72 note (h), optimized for through-hardening in bearing applications. Not treated or tempered. Specific classification under 7227.90.1030 for tool steel subcategory.