Titanium alloys tc4 and tc6 compared

Chemical composition and microstructure：
‌TC4 titanium alloy ‌ : the main chemical composition includes titanium (Ti), aluminum (Al), vanadium (V) and iron (Fe). Its nominal composition is Ti-6Al-4V, which belongs to martensitic α+β titanium alloy and has good comprehensive mechanical properties ‌12.
‌TC6 titanium alloy ‌ : chemical composition including titanium (Ti), aluminum (Al), molybdenum (Mo), chromium (Cr), iron (Fe) and silicon (Si). Its nominal composition is Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si, a martensitic α-β two-phase titanium alloy with good comprehensive mechanical properties ‌24.
Mechanical property
‌TC4 titanium alloy ‌ :
Operating temperature range: -100℃ to 550℃
Density: 4.51g/cm³
Room temperature tensile strength ≥895MPa, residual elongation stress ≥825MPa, elongation ≥10%, section shrinkage ≥25%
High temperature (400℃) tensile strength ≥620MPa, lasting strength ≥570MPa‌2
‌TC6 titanium alloy ‌ :
Operating temperature range: below 300℃
Density: 4.51g/cm³
Room temperature tensile strength ≥980MPa, residual elongation stress ≥840MPa, elongation ≥10%, section shrinkage ≥25%
High temperature (400℃) tensile strength ≥735MPa, lasting strength ≥665MPa‌2
Application field
‌TC4 titanium alloy ‌ : because of its excellent corrosion resistance, small density, high specific strength and good toughness and weldability, widely used in aerospace, petrochemical, shipbuilding, automobile and pharmaceutical fields ‌12.
‌TC6 titanium alloy ‌ : because of its high temperature stability and corrosion resistance is better, suitable for high temperature environment, such as the use of aircraft structural parts temperature below 300℃ ‌24.
In summary, TC4 and TC6 titanium alloys have their own advantages in terms of chemical composition, mechanical properties and application fields, and the selection should be made according to the specific use needs and environmental conditions