| HS Code | Product Description | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|---|
| 7320103000 | Springs and leaves for springs, of iron or steel: Leaf springs and leaves therefor: Suitable for motor vehicle suspension: To be used in motor vehicles having a G.V.W. not exceeding <il>4 metric tons</il> | Doc | 83.2% | CN | US | 2025-05-12 |
| 7320201000 | Springs and leaves for springs, of iron or steel: Helical springs: Suitable for motor-vehicle suspension | Doc | 65.7% | CN | US | 2025-05-12 |
| 8307103000 | Flexible tubing of base metal, with or without fittings: Of iron or steel: With fittings | Doc | 58.8% | CN | US | 2025-05-12 |
| 8307106000 | Flexible tubing of base metal, with or without fittings: Of iron or steel: Other | Doc | 58.8% | CN | US | 2025-05-12 |
| 8311900000 | Wire, rods, tubes, plates, electrodes and similar products of base metal or of metal carbides, coated or cored with flux material, of a kind used for soldering, brazing, welding or deposition of metal or of metal carbides; wire and rods, of agglomerated base metal powder, used for metal spraying; base metal parts thereof: Other | Doc | 55.0% | CN | US | 2025-05-12 |
Long Spring
A long spring is a mechanical component designed to store mechanical energy when deformed elastically and release that energy upon restoration of its original shape. They are characterized by a significant length relative to their diameter, typically exhibiting a helical coil structure.
Material
Long springs are commonly manufactured from:
- High-Carbon Steel: Offers high strength and elasticity, suitable for general-purpose applications. Often coated for corrosion resistance. (e.g., Music Wire, Oil-Tempered Wire)
- Stainless Steel: Provides excellent corrosion resistance, making them ideal for applications in harsh environments. (e.g., 302, 304, 316 stainless steel)
- Alloy Steel: Used for high-stress, high-temperature, or specialized applications, offering enhanced durability and performance. (e.g., Chrome Vanadium)
- Non-Ferrous Alloys: Such as Beryllium Copper, Phosphor Bronze, and Inconel, employed when magnetic properties are critical or specific corrosion resistance is required.
Purpose
The primary purpose of a long spring is energy storage and controlled force application. This is utilized in a wide array of systems.
Function
Long springs function based on Hooke's Law, where the force exerted by the spring is proportional to its displacement. Key functional aspects include:
- Energy Absorption: Absorbing shock or impact loads.
- Force Application: Providing a consistent or variable force.
- Return Mechanism: Returning a component to its original position.
- Vibration Damping: Reducing oscillations and vibrations.
Usage Scenarios
- Suspension Systems: In vehicles (cars, motorcycles, bicycles) to absorb shocks and provide a smooth ride.
- Valve Mechanisms: In engines and other machinery to control fluid flow.
- Shock Absorbers: In various industrial and consumer applications.
- Furniture: In sofas, chairs, and mattresses to provide support and comfort.
- Mattresses and Cushions: Providing resilience and support.
- Industrial Machinery: In punch presses, presses, and other equipment requiring controlled force.
- Toys and Games: Providing movement or resistance.
Common Types
- Compression Springs: Designed to resist compression forces and store energy when compressed. The most common type.
- Extension Springs: Designed to resist tensile forces and store energy when stretched.
- Torsion Springs: Designed to resist twisting forces and store energy through angular deflection.
- Varible Spring Rate Springs: Designed with varying coil diameters or wire gauges to provide a progressive force output.
- Conical Springs: Have a conical shape, often used where space is limited or a variable spring rate is desired.
- Disc Springs (Belleville Washers): Conical, disc-shaped springs used for high loads and limited deflection. While not helical, they function as springs.
The declared goods, “long spring”, fall under the category of springs made of iron or steel. These springs are components used in suspension systems, primarily for motor vehicles.
Here are the relevant HS codes based on the provided information:
-
7320103000: This HS code covers springs and leaves for springs, of iron or steel; leaf springs and leaves therefor; suitable for motor vehicle suspension; to be used in motor vehicles having a G.V.W. not exceeding 4 metric tons.
- 73: Metal manufactures not elsewhere specified; includes iron or steel products.
- 20: Springs and leaves for springs.
- 10: Leaf springs and leaves therefor.
- 30: Suitable for motor vehicle suspension; to be used in motor vehicles having a G.V.W. not exceeding 4 metric tons.
- Total Tax Rate: 83.2% (Base Tariff: 3.2%, Additional Tariff: 25.0%, Post-April 2, 2025 Additional Tariff for steel/aluminum products: 30%).
-
7320201000: This HS code covers springs and leaves for springs, of iron or steel; helical springs; suitable for motor-vehicle suspension.
- 73: Metal manufactures not elsewhere specified; includes iron or steel products.
- 20: Springs and leaves for springs.
- 20: Helical springs.
- 10: Suitable for motor-vehicle suspension.
- Total Tax Rate: 65.7% (Base Tariff: 3.2%, Additional Tariff: 7.5%, Post-April 2, 2025 Additional Tariff for steel/aluminum products: 30%).
Please note that the applicable tax rate depends on whether the motor vehicle's Gross Vehicle Weight (G.V.W.) exceeds 4 metric tons. If the G.V.W. is not exceeding 4 metric tons, HS code 7320103000 applies. Otherwise, HS code 7320201000 is more appropriate.