TA2 titanium welding wire is a pure titanium welding material designed for gas shielded welding (such as MIG welding). It retains the excellent properties of pure TA2 titanium while optimising its composition and process compatibility to meet the efficiency requirements of gas shielded welding. It is widely used for batch welding of medium-to-thick pure titanium components.

Material and Performance Core

As a Grade 2 pure titanium welding wire, TA2 has a titanium content of ≥99.6%, with strict control of impurities (iron ≤0.3%, oxygen ≤0.25%). Its mechanical properties are consistent with those of TA2 welding wire used in argon arc welding: tensile strength of 450–500 MPa, elongation ≥20%, weld joint strength approaching that of the base material, and excellent corrosion resistance, particularly in environments such as seawater and humid chlorine gas.

Unique advantages of gas shielded welding

Compared to TIG welding, gas shielded welding (MIG welding) using TA2 welding wire achieves automated or semi-automated welding through continuous wire feeding, improving efficiency by 30%-50%, making it more suitable for mass production of long welds and thick plates (3 mm or above). During welding, high-purity argon (99.99%) is used as the shielding gas. In some applications, 2%-5% helium can be added to enhance arc heat input and improve weld penetration uniformity.

Application Scenarios and Process Key Points

    • Core Applications: Chemical equipment (titanium storage tanks, pipelines), marine engineering (ship titanium alloy structures), metallurgical equipment, and other applications requiring efficient welding of pure titanium components.

• Process Key Points: A dedicated gas shielded welding gun must be used to ensure gas coverage of the weld pool and heat-affected zone (nozzle flow rate: 15–25 L/min); Welding current should be adjusted according to plate thickness (e.g., 200–250 A for 5 mm plates) to avoid excessive current causing wire burnout or shielding failure.

Differences from argon arc TA2 welding wire
Comparison Item Gas-shielded titanium welding wire TA2 Argon arc titanium welding wire TA2
Welding method MIG welding (continuous wire feeding, efficient) TIG welding (manual wire feeding, precise) 
Suitable plate thickness: Medium-thick plates over 3 mm Thin plates under 3 mm  
Efficiency: High (suitable for mass production) Medium (suitable for precision components)  
Protection requirements: Requires enhanced gas flow and coverage Focuses on localised precise protection  

Usage precautions  

Store in a sealed, moisture-proof environment to prevent surface oxidation; clean oil and oxide scale from the welding wire and base material surface before welding (use a stainless steel wire brush or acid wash); Common diameters: 1.6–3.2 mm, spooled (10–20 kg per spool), compatible with automated wire feeding equipment to reduce manual intervention.

Titanium-coated welding wire TA2, with its high efficiency and reliability, is the preferred choice for large-scale production of pure titanium components. Properly matching shielding gas parameters and welding current is the key to ensuring weld quality.