Gr. 5

DAIKO Ti 5 is a titanium grade 5 (Ti 6Al-4V), commonly called “6-4,” is the most common and widely used alloy grade. It has an ultimate tensile strength of 895 MPa minimum, good weldability, and can be heat treated to a higher strength or toughness. Grade 5 is used in aircraft components such as landing gear, wing spars, and compressor blades. Its corrosion resistance is generally comparable to Grade 2 and it is often used in corrosion service where higher strength is required, particularly in shafts, high strength bolting, and keys It is characterized by good hot formability and weldability. It is also resistant to salt water, marine atmosphere and a variety of corrosive media temperatures below 300 ° C.

Gr. 5 titanium.

Alpha (compact hexagonal lattice-HCP) and Beta alloys (body centered cubic lattice-BCC) .

Grade 5, Ti-6Al-4V.
EN W.Nr.: 3.7165.
ASTM: Ti-Gr 5.

Titanium, being a reactive metal, is susceptible to embrittlement by oxygen, nitrogen, and hydrogen at elevated temperatures. As a result, safeguarding the metal from atmospheric contamination becomes crucial. This protection is achieved by shielding the metal with welding-grade inert gas. Throughout arc welding, it is imperative to maintain this shielding until the titanium has cooled below about 430°C. To ensure optimal welding conditions, the titanium metal itself must be free of thick oxide and undergo thorough chemical cleaning Prior to welding initiation. Contamination from oxide, water, grease, or dirt can also lead to embrittlement. For titanium welding rods, ensure they're clean and free of heavy oxide, moisture, grease, and dirt. Cleaning between passes is usually unnecessary if the weld bead stays bright and silvery. Discoloration like straw or light blue can be removed with a stainless steel wire brush. However, contaminated weld beads with dark blue, gray, or white powdery discoloration must be completely ground off. The joint requires meticulous preparation and cleaning before proceeding with additional welding.