AISI 4140 Alloy Steel Flat Bar
Semi-finished AISI 4140 chromium-molybdenum alloy steel flat bar with rectangular cross section where width is at least four times the thickness, in primary form suitable for further processing. Classified under HTS 7224.90.0055 as other alloy steel semi-finished products (not tool steel or stainless) with specified dimensions. Excludes high-strength, universal mill, or other specially defined steels.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If qualifying as high-strength steel
High-strength steel (thickness <3mm/275MPa or ≥3mm/355MPa) falls under separate statistical suffix per US note (a).
If not alloy steel (>10% total alloying elements)
Non-alloy steel semi-finished products shift to Chapter 72 heading 7214.
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Import Tips & Compliance
• Certify exact alloy composition excluding tool steel definitions (e.g
• >1.2% C + >10.5% Cr) to avoid reclassification
• Avoid rust/discoloration claims as no duty allowance per Chapter 72 note
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.
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.
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.