Compression spring Hs Code

Compression spring harmonized system code

Product Overview Compression springs classified under HS Code 732020 are mechanical components fabricated from coiled wire designed to absorb and store energy through axial compression. These springs are typically manufactured from high-grade carbon steel, stainless steel, or alloy materials, exhibiting precise dimensional tolerances, consistent coil pitch, and uniform wire diameter ranging from 0.1 mm to over 10 mm depending on application requirements. Processing involves cold winding, heat treatment to optimize elasticity and fatigue resistance, and surface finishing techniques such as passivation or coating for corrosion protection. The HS Code 732020 encompasses a range of compression springs including cylindrical, conical, and barrel-shaped types, enabling classification by geometry and functional attributes. Commercially, these springs serve critical roles in food processing machinery, retail equipment (such as automated dispensers), and packaging systems, where reliable load bearing and repetitive compression cycles are essential. Their competitive advantage lies in engineered durability, compliance with industry-specific mechanical standards, and adaptability to automated assembly lines, positioning them as indispensable components in industrial and commercial applications. HS Code Classification & Trade Specifications The HS Code 732020 is a six-digit tariff designation under Chapter 73 (“Articles of Iron or Steel”), Heading 7320 (“Springs and Leaves for Springs of Iron or Steel”), with subheading 732020 specifically assigned to compression springs. This classification is justified by the product’s composition (iron or steel), mechanical function (elastic energy storage via compression), and manufacturing method (wire coiling). For international trade, compression springs are commonly packaged in moisture-resistant cartons or metal tins, often accompanied by desiccants to prevent corrosion during transit. Preservation methods include oiling or application of anti-rust coatings compliant with ISO 9227 salt spray testing standards. Shipping requirements emphasize secure immobilization to prevent deformation and quality degradation. Quality standards aligned with ASTM A228 (music wire) or EN 10270 series ensure mechanical properties such as tensile strength (up to 2500 MPa), spring index, and fatigue life meet stringent performance criteria. Adherence to WTO customs documentation protocols and harmonized system nomenclature facilitates accurate classification, duty assessment, and smooth customs clearance globally.

Compression spring Chapter Note

1.- In this Chapter the expression “cast iron” applies to products obtained by casting in which iron predominates by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in Note 1 (d) to Chapter 72. 2.- In this Chapter the word “wire” means hot or cold-formed products of any cross-sectional shape, of which no cross-sectional dimension exceeds 16 mm.