AISI 52100 Ball-Bearing Steel Round Bar
A precision-ground round bar made from AISI 52100 alloy steel, specifically formulated for ball-bearing applications with controlled carbon (0.95-1.13%), chromium (1.25-1.65%), and low sulfur/phosphorus levels as defined in HTS Chapter 72 note (h). This falls under HTS 7228.60.10.30 as other bars and rods of tool steel (not high-speed) of ball-bearing steel. It is hot-rolled or forged into bar form without further working beyond basic surface treatments.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not meeting exact ball-bearing steel elemental limits in note (h)
Bars of other alloy steel not qualifying as tool steel or ball-bearing steel fall under general other alloy steel bars in 7228.30
If containing high-speed steel elements
High-speed tool steel bars (with tungsten, molybdenum, vanadium beyond ball-bearing specs) classify under 7228.50 instead of ball-bearing steel
If made from non-alloy steel
Without alloying elements meeting Chapter 72 note definitions for alloy/tool steel, it becomes forged non-alloy steel bars under 7214
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Import Tips & Compliance
• Provide mill test certificates confirming ball-bearing steel composition per note (h) including exact C, Cr, Mn, S/P limits; declare as 'tool steel, ball-bearing grade' to avoid reclassification; watch for alloy content exceeding tool steel specs leading to Chapter 72 heading 7228.30
Related Products under HTS 7228.60.10.30
52100 Chrome Alloy Steel Hexagonal Bar
Hexagonal profile bar produced from 52100 ball-bearing steel meeting Chapter 72 note (h) specifications for bearing manufacturing, with precise low impurity levels and chromium content. Classified under HTS 7228.60.10.30 as other bars/rods of tool steel of ball-bearing composition, not high-speed steel. Typically used for bearing races and rolling elements.
GCr15 Ball-Bearing Steel Square Bar
Square cross-section bar of GCr15 (Chinese equivalent to 52100) ball-bearing steel with composition certified to Chapter 72 note (h): 0.95-1.13% C, 1.25-1.65% Cr, minimal S/P. HTS 7228.60.10.30 covers these tool steel bars specifically for bearing production, distinguished from general alloy steel.
SUJ2 Japanese Ball-Bearing Steel Flat Bar
Flat bar stock of SUJ2 high-carbon chrome bearing steel equivalent to AISI 52100, meeting all Chapter 72 note (h) criteria for ball-bearing tool steel. Under HTS 7228.60.10.30 as other bars/rods (not angles/shapes) of this specific grade, used in precision bearing components.
100Cr6 Ball-Bearing Steel Rod
Drawn or ground rod of 100Cr6 (DIN equivalent 52100) ball-bearing steel precisely matching Chapter 72 note (h) composition for superior fatigue resistance in bearings. HTS 7228.60.10.30 applies to these other bars/rods of tool steel, excluding high-speed grades and hollow drill rods.