HY-80 High-Yield Submarine Hull Steel Plate
HY-80 nickel-chromium-molybdenum alloy steel plate (width 800 mm) for naval submarine hull construction, yield strength 80 ksi. HTS 7225.99.0090 covers this military-grade other alloy steel flat-rolled product. Multi-element alloy composition.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If cold-rolled HY-80
Cold-rolled high-strength alloys still use 7225.40 cold-rolled section.
If considered carbon steel
Labs may debate Ni/Cr levels; have independent analysis ready.
If imported in coils
Delivery form (coil vs plate) drives 7225.30 classification.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• ITAR/export control documentation likely required for military end-use
• Yield strength certification but classification by chemistry, not strength
• Avoid disclosing end-use if sensitive; classify by material specs only
Related Products under HTS 7225.99.00.90
A516 Grade 70 Pressure Vessel Steel Plate
Flat-rolled alloy steel plate meeting ASTM A516 Grade 70 specifications, with a width exceeding 600 mm, used for fabricating pressure vessels and boilers. Classified under HTS 7225.99.0090 as other flat-rolled products of alloy steel not cold-rolled, not further worked, and not fitting specific alloy steel subheadings. The alloy composition exceeds general carbon steel limits, qualifying it as 'other alloy steel' per Chapter 72 notes.
A387 Grade 11 Heat-Resistant Alloy Steel Plate
ASTM A387 Grade 11 flat-rolled alloy steel plate, width over 600 mm, containing 1-1.5% chromium for elevated-temperature service in refineries. Falls under HTS 7225.99.0090 as 'other' alloy steel flat-rolled products not cold-rolled or further worked. Chromium content qualifies as alloy steel per Chapter 72 definitions.
A514 Grade B High-Yield Strength Alloy Steel Plate
ASTM A514 Grade B quenched and tempered alloy steel plate over 600 mm wide for structural applications requiring high strength-to-weight ratio. Classified in 7225.99.0090 as other flat-rolled alloy steel, hot-rolled, not further worked. Meets alloy steel criteria through combined nickel, chromium, and molybdenum content.
A353 Grade Ni-Ni Alloy Steel Plate for Low-Temperature Service
ASTM A353 nickel-alloyed steel plate (9% nickel) over 600 mm wide for cryogenic applications like LNG tanks. HTS 7225.99.0090 covers this as other flat-rolled alloy steel not fitting tool steel, electrical, or other specific categories. High nickel qualifies as alloy steel.
SA-204 Grade B Chromium-Molybdenum Alloy Steel Plate
ASME SA-204 Grade B pressure vessel quality alloy steel plate, width ≥600 mm, with 0.5% Cr and 0.5% Mo for high-temperature service. Fits HTS 7225.99.0090 as other flat-rolled alloy steel, hot-rolled, not cold-rolled or further worked. Alloy elements per Chapter 72 definitions.
A302 Grade A Manganese-Molybdenum Alloy Steel Plate
ASTM A302 Grade A normalized manganese-molybdenum alloy steel plate >600 mm wide for pressure vessels. Classified 7225.99.0090 as other hot-rolled alloy steel flat products. Molybdenum content (0.45-0.65%) establishes alloy status.