AISI 4130 Chromoly Flat Bar Stock
AISI 4130 chromium-molybdenum low alloy steel flat bar stock, semi-finished with rectangular section width at least four times thickness, aircraft grade. Under HTS 7224.90.0055 as other (non-specialty defined) alloy steel.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If ball-bearing steel
Specific C/Cr/Si element ranges for bearings per US note (h).
If ingot/primary rather than semi-finished
Ingot forms precede semi-finished in heading 7224.
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Import Tips & Compliance
• Reference SAE/ASTM specs in entry docs to support alloy classification
• Ensure billet not in coil form (would shift to other subheadings)
• Pre-inspect for 'further worked' surfaces like burnishing
Related Products under HTS 7224.90.00.55
34CrNiMo6 Quenched Alloy Flat Slab
EN 34CrNiMo6 nickel-chromium-molybdenum steel flat slab for heavy shafts, hot-rolled semi-finished with flat rectangular profile ≥4:1 ratio. Classified under HTS 7224.90.0055 other alloy steel.
AISI 4340 Nickel-Chromium-Molybdenum Flat Slab
AISI 4340 low-alloy steel flat slab in semi-finished form with width at least four times thickness, used for aerospace and structural applications. Falls under HTS 7224.90.0055 as rectangular cross-section other alloy steel, excluding special definitions like razor blade or ball-bearing steel.
AISI 8620 Carburizing Grade Flat Slab
AISI 8620 nickel-chromium-molybdenum carburizing steel slab with flat rectangular profile (width 4+ times thickness) for gear manufacturing. Classified HTS 7224.90.0055 as semi-finished other alloy steel, not meeting ball-bearing or heat-resisting definitions.
HY-80 High-Yield Alloy Steel Flat Billet
HY-80 quenched and tempered alloy steel flat billet (rectangular, width ≥4x thickness) for submarine/shipbuilding hull plate stock. HTS 7224.90.0055 for other alloy semi-finished excluding high-strength steel yield specs.
15CrMo Structural Alloy Flat Slab
15CrMo (1.5% Cr, 0.5% Mo) alloy steel flat slab for pressure vessels, rectangular cross section ≥4:1 width:thickness ratio, hot-rolled semi-finished. HTS 7224.90.0055 for rectangular other alloy steel products.
AISI 4330V Modified Alloy Flat Billet
AISI 4330V vacuum-melted Ni-Cr-Mo alloy steel flat billet for landing gear, rectangular with width 4+ times thickness. Fits HTS 7224.90.0055 other alloy semi-finished excluding defined specialty steels.