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The OnlineMetals Guide to Titanium

 

Most of us know and love Titanium for the positive impact it has had on our golf games. When titanium became available as a material for drivers and 3-woods, many of us rushed out to buy the latest incarnation of Big Bertha. The light weight (especially compared to stainless steel) and high strength of titanium makes it an ideal choice for lots of applications. Sadly, we don't sell the type of titanium that would allow us to cast our own driver heads.

 

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.

 

 

Grade 2 Titanium (available in Plate, Round, Sheet, Tube)
6Al-4V Titanium (available in Round)
6Al-4V ELI Titanium (available in Round)

 

Grade 2 Titanium
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.

 

Grade 2 (a/k/a CP-2) Titanium
Minimum Properties Ultimate Tensile Strength, psi 50,000
Yield Strength, psi 40,000 - 65,000
Elongation 20% min
Rockwell Hardness B70 - B90
Chemistry Titanium (Ti) 99.2%
Carbon (C) 0.1% max
Iron (Fe) 0.3%
Hydrogen (H) 0.015% max
Nitrogen (N) 0.03% max
Oxygen (O) 0.25% max

 

6Al-4V (a/k/a Grade 5) Titanium
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.

 

6Al-4V (a/k/a Grade 5) Titanium
Minimum Properties Ultimate Tensile Strength, psi 138,000
Yield Strength, psi 128,000
Elongation 14%
Rockwell Hardness C36
Chemistry Titanium (Ti) 90%
Aluminum (Al) 6%
Vanadium (V) 4%
Iron (Fe) 0.25% max
Oxygen (O) 0.2% max

 

6Al-4V ELI (extra low interstitial) Titanium
The strength of this variant of 6Al-4V is slightly lower than its parent alloy, but it has improved fracture toughness and fatigue strength characteristics. It is also bio-compatible, and is often used in jewlery for body piercings.

 

6Al-4V ELI (extra low interstitial) Titanium
Minimum Properties Ultimate Tensile Strength, psi 125,000
Yield Strength, psi 115,000
Elongation 15%
Rockwell Hardness C35
Chemistry Titanium (Ti) 90%
Aluminum (Al) 6%
Vanadium (V) 4%
Iron (Fe) 0.14% max
Oxygen (O) 0.13% max