Titanium Rectangular Tubes Used in Building Structures

Titanium tubing is made from titanium or titanium alloys. It features characteristics such as being lightweight, having high strength, and offering excellent corrosion resistance. Compliant with standards like GB/T3624, GB/T3625, and ASTM B337/338, it is widely used in the chemical industry, aerospace, marine engineering, medical, and other fields. Common grades include TA0-TA10, BT1 series, and Gr1-Gr2. These grades are classified into α-type (TA series), β-type (TB series), and α+β-type (TC series). Their properties are tailored through the addition of elements such as aluminum and molybdenum. In particular, aluminum enhances the material's strength and heat resistance.

The production process for titanium tubes encompasses technologies like cold rolling, welding, and extrusion. The outer diameter ranges from 4mm to 2800mm, with wall thickness deviation controlled within ±12.5%. The chemical composition must comply with impurity content standards to maintain plasticity. Its density is approximately 4.51 g/cm³, and its tensile strength can reach over 895 MPa. Its operating temperature range spans from -253°C to 550°C. Titanium tubes are primarily used in applications such as heat exchange equipment (e.g., condensers, evaporators), as standard tubing in the nuclear power industry, for aircraft engine compressor components, and in spacecraft fuel storage tanks.

These tubes are typically fabricated from commercially pure titanium (e.g., Grade 1/TA1, Grade 2/TA2) or titanium alloys (e.g., Ti-6Al-4V/TC4, Ti-3Al-2.5V/TA18). Key material characteristics include:

High Strength-to-Density Ratio: Tensile strength comparable to carbon steel, with a density of 4.51 g/cm³ (significantly lower than steel).

Exceptional Corrosion Resistance: A dense, self-repairing oxide layer provides superior resistance to acids (including hydrochloric and sulfuric acid), alkalis, and other aggressive media.

Favorable Fabrication Characteristics: Excellent weldability, cold/hot workability, and low-temperature toughness.

Elevated Temperature Performance: Maintains high strength and hardness up to 600°C, with good creep rupture strength at temperatures approaching 900°C.

Production involves four primary stages:

Raw Material Selection: Titanium seamless or welded round tubes as feedstock.

Roll Forming: Cold/hot rolling to transform circular cross-sections into rectangular profiles.

Heat Treatment: Annealing to optimize mechanical properties and relieve stresses.

Surface Finishing: Machining (turning, polishing), deburring, and non-destructive testing to eliminate surface defects.

Standard dimensional ranges include:

Outside Dimensions: 3 mm to 500 mm (square/rectangular)

Wall Thickness: 0.8 mm to 8 mm

Length: ≤ 6000 mm (standard)

Custom dimensions are available per customer requirements.

Aerospace: Airframe structures, engine components

Marine Engineering: Ship piping systems, desalination units (seawater corrosion resistance)

Chemical & Energy: Chlor-alkali processing, petrochemical equipment, heat exchangers

Construction & Machinery: Structural frameworks, solar mounting systems, crane components

Medical Devices: Surgical instruments and implants (benefiting from biocompatibility)