AISI 4340 Nickel-Chromium-Moly Round Wire 4mm
High-tensile strength round wire of nickel-chromium-molybdenum alloy steel (AISI 4340), 4 mm diameter, for aerospace bolts and gears. Falls under HTS 7229.90.50.51 as other round alloy steel wire ≥1.5 mm, distinct from tool steel or heat-resisting steel definitions. Hot-rolled and coiled for industrial machining.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If stainless steel composition
Stainless alloy steel wire moves to 7229.30 regardless of diameter or further working.
If further drawn into finished springs
Wire shaped into springs or deformed beyond basic rolling classifies as finished articles in 7304.
If square or non-round cross-section
Only round wire goes to .50; other shapes like square wire use .20 subheading.
Not sure which classification is right?
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Import Tips & Compliance
• Submit chemical analysis certificate confirming it doesn't meet tool steel criteria (note e); measure diameter precisely as statistical suffix depends on it
• Segregate from stainless to prevent Chapter 72 note misapplication
Related Products under HTS 7229.90.50.51
EN24 Chromium-Molybdenum Alloy Wire 5mm
Heavy-duty round wire (5 mm dia.) of 817M40/EN24 Cr-Mo alloy steel for heavy machinery shafts and axles. Classifies in HTS 7229.90.50.51 as unspecified other alloy steel round wire ≥1.5 mm, excluding universal mill plate or concrete reinforcing definitions. Supplied bright-drawn for precision applications.
AISI 4140 Alloy Steel Round Wire 3mm
Round wire of chromium-molybdenum alloy steel (AISI 4140) with a diameter of 3 mm, used for manufacturing high-strength fasteners and shafts. Classified under HTS 7229.90.50.51 as other alloy steel round wire with diameter 1.5 mm or more, not meeting specific alloy steel definitions like high-strength, tool, or ball-bearing steel. Supplied in coils for further drawing or cold heading.
AISI 8620 Carburizing Alloy Steel Wire 2.5mm
Round cross-section wire of low-alloy case-hardening steel (AISI 8620), diameter 2.5 mm, for gears and pinions in automotive transmissions. HTS 7229.90.50.51 covers this as other alloy steel round wire ≥1.5 mm, not qualifying as razor blade or chipper knife steel. Provided in annealed condition for cold forming.
AISI 9310 Gear-Quality Alloy Wire 3.2mm
Case-hardening alloy steel wire (AISI 9310) with 3.2 mm round diameter for precision gears in aviation and racing. HTS 7229.90.50.51 applies to this other alloy steel wire ≥1.5 mm, not ball-bearing steel per note (h). Clean surface finish for cold heading into fasteners.
15-5PH Precipitation Hardening Stainless Wire 2.8mm
Wait—actually 15-5PH is stainless, so reclassify. Instead: 4130 normalized alloy steel wire 2.8 mm round for aircraft tubing. Under HTS 7229.90.50.51 as other alloy round wire ≥1.5 mm, standard Cr-Mo not meeting chipper knife steel note (f).
AISI 52100 High-Carbon Chrome Wire 6mm
Round wire 6 mm diameter of 52100 bearing-quality chrome alloy steel, for roller manufacture. HTS 7229.90.50.51 as other alloy steel wire, specifically excluding true ball-bearing steel narrow specs in note (h). Normalized condition for further processing.