TA2 (ASTM Grade 2 / UNS R50400) Commercially Pure Titanium

TA2 is a Chinese grade of commercially pure (CP) α-titanium, corresponding to international ASTM Grade 2 / UNS R50400 / DIN 3.7035. The most widely used CP titanium grade, it offers a balanced combination of low density, moderate strength, excellent ductility, outstanding corrosion resistance and good weldability, and is the standard choice for chemical, marine, aerospace and medical applications.

Overview

• Material: TA2 — commercially pure titanium (Grade 2)
• International equivalent: ASTM Gr.2 / UNS R50400 / DIN 3.7035 (medical: ASTM F67 / ISO 5832-2)
• Class: Single α-phase pure titanium
• Available forms: Bar, plate, sheet, strip, tube, wire and forgings

Chemical Composition (wt%)

Physical Properties

Mechanical Properties

Key Features

• Low density with relatively high strength and excellent ductility / formability;
• Good corrosion resistance against most media at room temperature;
• Excellent biocompatibility;
• Good thermal stability, retaining performance at elevated temperature.

Fabrication & Heat Treatment

• Melting: at least one vacuum arc remelting (VAR) to ensure purity and consistency.
• Hot working: forged or extruded at 800–900 °C in a neutral or slightly oxidising atmosphere.
• Cold working: cold rolled and cold drawn; intermediate annealing is required when cold reduction reaches 30–60 %.
• Welding: typically TIG welding with TA2 filler wire/electrode; control current, voltage and speed and maintain a pure inert-gas shield.
• Annealing: 650–720 °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, heat exchangers and piping;
• Biomedical: dental implants, artificial joints and other medical devices (per ASTM F67 / ISO 5832-2 where applicable);
• Marine engineering: vessels and offshore oil-drilling platform equipment;
• Consumer goods: eyewear, communication antennas and spring components.

For detailed datasheets, mill certificates (EN 10204 3.1) or inquiries on specific sizes and tolerances, please contact our sales & engineering team.