Description
Of the four commercially pure (C.P.) titanium grades, Grade 2 is typically used in applications that require superior corrosion resistance in various aggressive media. Corrosion resistance is similar between these four C.P. grades but mechanical properties vary along with varying oxygen and iron contents. Typical applications for the “C.P.” grades include chemical process, petroleum refining, biomedical as well as heat exchangers in an array of different applications. Continuous service temperatures can reach up to 800°F with occasional, intermittent service at 1000°F.
Resistance to Corrosion
Titanium’s C.P. grades corrosion resistance comes from a strongly adherent, stable, protective oxide film, which forms in the presence of oxygen. This film makes the commercially pure titanium grades resistant to most oxidizing, neutral and inhibited reducing as well as mildly reducing environments. Strong reducing media may cause heavy corrosion.
Fabrication and Heat Treatment
Titanium Grade 2 has good ductility, which allows for cold formability. The minimum bend radius for material under 0.070″ thick should be 2T while 2.5T
should be used for material over 0.070″. The material can also be easily machined, hot worked
and welded. Hot working should be performed between 400°F
and 600°F. Stress relieving should be performed by heating to a temperature between 900°F and 1100°F followed by either forced air or slow cooling.
Welding of Grade 2 titanium can be done using various methods such as MIG and TIG. Inert gas shielding is crucial to prevent oxygen pickup and embrittlement of the weld area. A mixture of argon and helium is typically preferred but should be proven before accepting a procedure. Preheat or post heat treatments are not required.
Specifications
R50400, ASTM B348, ASME SB348, ANNEALED, MERCURY FREE, EN 10204-3.1, ASTM B265, ASME SB265, COLD ROLLED, HOT ROLLED