Black Square Tube is a type of steel tubing that features a square cross-section

Black Square Tube is a type of steel tubing that features a square cross-section and often has a black oxide layer on its surface due to a heat treatment process. Below is a detailed introduction to black square tubes:

Production Process

Material: Black square tubes are typically made from carbon steel.

Heat Treatment: The steel is heated to a high temperature and then rapidly cooled, resulting in a harder material with a black oxide layer on the surface.

Characteristics

Moderate Hardness: The hardness of black square tubes is slightly higher than that of ordinary carbon steel, making them suitable for medium-strength applications.

Good Toughness: Despite the heat treatment, black square tubes maintain good plastic deformation ability and are not prone to brittle fracture.

Excellent Wear Resistance: The hardened surface layer improves the material's resistance to wear and extends its service life.

Dimensional Stability: The heat treatment process makes the material's structure more uniform, reducing the tendency to deform during use.

Ease of Processing: Black square tubes can be easily cut, drilled, and subjected to other machining operations.

Applications

Building and Construction: Black square tubes are ideal for use as support structures and frameworks, such as scaffolding, bridges, and highway guardrails.

Machinery Manufacturing: They are used to make various machine parts, such as shafts, gearbox housings, and couplings, as well as transmission components in agricultural equipment.

Transportation: Black square tubes can be found in automotive suspension systems, chassis components, and connecting rods for train carriages.

Energy Industry: They are used in oil and gas pipelines, as well as in the towers and blades of wind turbines.

Furniture and Decoration: Modern-style furniture legs and decorative strips may use black square tubes to enhance their fashionable appearance.

Other Fields: Black square tubes are also used in sports equipment, musical instrument stands, and the skeletons of medical devices due to their sturdy nature.

Specifications and Customization

Size: Black square tubes are available in a range of sizes, typically from 10mm x 20mm to 400mm x 400mm.

Thickness: 0.5mm - 20mm.

Customization: Many manufacturers offer customization options, allowing customers to specify the exact size, thickness, and surface treatment they require.

Packaging and Delivery

Packaging: Black square tubes are typically packaged in standard export packaging or as required by the customer. They may be bulked, bundled, or packed in a seaworthy manner.

Delivery Time: Delivery times can vary depending on the manufacturer and the quantity ordered, but typically range from 15 to 30 days.