Gr. 2

This filler material is intended for GTAW and GMAW welding of commercially pure titanium alloys, often used in contexts requiring high performance resistance to high temperatures and chemical reagents. Among the four available grades of pure titanium filler metals, C.P. grade 2 (ERTi-2) is notable for its widespread use, excellently balancing mechanical strength, formability, and weldability. The aerospace industry represents the main field of application, favoring it for its tensile strength and excellent weight-strength ratio. Additional uses include cryogenic and petrochemical fields, where it is employed in heat exchangers for chemical processes, pressure vessels, piping systems, pulp bleaching equipment, and electrochemical and chemical storage tanks. Compared to other types of commercially pure titanium, this grade is slightly less strong than grade 3 but more robust than grade 1, ensuring excellent corrosion resistance. Grade 2 offers a formidable balance between moderate mechanical strength and adequate ductility, and it is also non-magnetic.

Gr. 2 titanium, commercially pure.

Pure alpha alloys (compact hexagonal lattice-HCP).

Suitable for welding Titanium grade 1, 2, 3 and 4.

• EN W.Nr.: 3.7025, 3.7035, 3.7055, 3.7065
• ASTM: Ti-Gr 1, Ti-Gr 2, Ti-Gr 3, Ti-Gr 4
• UNS: R504007, R50400, R50550, R50700

Titanium, being a reactive metal, is sensitive to embrittlement induced by oxygen, nitrogen, and hydrogen at high temperatures. Therefore, it is essential to protect it from atmospheric contamination by shielding it with inert gases during welding. In the arc welding process, it is crucial to keep titanium protected from the surrounding atmosphere until it cools below about 430°C. Before welding, the metal must be entirely oxide-free and chemically clean, as contaminants like oxides, water, grease, or dirt can lead to embrittlement. Consequently, titanium welding rods must be chemically cleaned and free from heavy oxides, absorbed moisture, grease, and dirt. Cleaning between passes is not necessary if the weld bead maintains a shiny, silver-like appearance. A shift in the weld color towards yellow or blue can be eliminated with a clean stainless steel wire brush. Contaminated weld beads, indicated by a dull dark blue, gray, or white color, must be entirely removed by grinding. The joint must be carefully prepared and cleaned before rewelding.