TA3G (ERTi-3) Commercially Pure Titanium Welding Wire

TA3G is a Chinese grade of commercially pure titanium in welding-wire form, corresponding to AWS A5.16 ERTi-3 / ASTM Grade 3 / UNS R50550. It shares the composition and properties of TA3 but is supplied as straight length or coil wire for TIG/MIG welding and fastener manufacture, offering higher strength than ERTi-1 / ERTi-2 while retaining good ductility, corrosion resistance and biocompatibility.

Overview

• Material: TA3G — CP titanium welding wire / fastener stock
• International equivalent: AWS A5.16 ERTi-3 / ASTM Gr.3 / UNS R50550
• Typical forms: straight wire and coiled wire (for TIG/MIG); bar and coil for fasteners

Chemical Composition (wt%)

Other elements: each ≤ 0.10 %, total ≤ 0.40 %.

Physical Properties

Mechanical Properties

Key Features

• Low density with relatively high strength;
• Good plasticity and formability;
• Good corrosion resistance in a wide range of environments;
• Good biocompatibility;
• Good thermal stability at moderate temperature.

Fabrication & Heat Treatment

• Hot working: forged, extruded or rolled at 800–900 °C in a neutral or slightly oxidising atmosphere.
• Cold working: cold drawn and rolled; intermediate annealing is required at high cold-reduction levels.
• Welding: typically TIG welding; clean the workpiece thoroughly before welding and maintain a full inert-gas shield.
• Annealing: 670–720 °C for 0.5–2 h.
• Stress-relief annealing: 530–550 °C for 0.5–1 h, or 470–490 °C for 2–4 h.

Typical Applications

• Aerospace: aircraft structural parts and engine components;
• Chemical industry: reactors, piping and columns (corrosion-resistant equipment);
• Biomedical: orthopaedic implants and dental instruments;
• Marine engineering: corrosion-resistant components for vessels and offshore platforms;
• Welding consumable: filler wire (ERTi-3) for higher-strength CP titanium fabrication.

For detailed datasheets, mill certificates or inquiries on wire diameters, spooling and packaging, please contact our sales & engineering team.