Titanium is unalloyed and is generally considered Commercially Pure or CP. Titanium is known almost universally as a high-strength, low-weight material (approximately 60% of steel), but it has other very desirable properties as well, most notably high corrosion resistance, and good electrical conductivity. Additionally, in its pure forms (like Grade 2) it is very ductile and easy to work. Generally the tensile and yield strength goes up with grade number for these “pure” grades. The difference in their physical properties is primarily due to the quantity of interstitial elements. Some typical applications include airframe components, cryogenic vessels, heat exchangers, CPI equipment, condenser tubing and pickling baskets.
Grade 2 Titanium Round Bar
Grade 2 titanium, in its annealed state, is a ductile metal with the approximate strength of 6061-T6 aluminum. It is used where corrosion resistance is an important criteria, or where operating temperatures preclude the use of aluminum.
6Al-4V (a/k/a Grade 5) Titanium Round Bar
This alloy of titanium shows a substantial strength improvement over aluminum, and is roughly twice as strong as 7075-T6 aluminum. It is also substantially harder to work and/or machine than Grade 2 titanium. Most machinists rate this material as slightly more difficult to machine than T-316L stainless steel, and recommend slow speeds and lots of lubrication.