Comprehensive analysis of the differences between TC4 titanium alloy and TC4Eli titanium alloy
The composition of titanium alloy TC4 material is Ti-6Al-4V, which belongs to (α+β)-type titanium alloy with good comprehensive mechanical and mechanical properties.TC4 is one of the main grades of the titanium alloy. With its excellent performance, it has shown its incomparable charm and strength in many high-end fields such as aerospace, military equipment, marine engineering and medical devices.
TC4Eli titanium alloy has a composition of T1-6A1-4V, which is an ultra-pure titanium alloy with low interstitial elements and excellent mechanical and process properties. Compared with TC4, TC4Eli has a lower content of impurity elements and stricter composition control, resulting in more stable and reliable performance.
TC4 and TC4EL have different names in different countries. See below for details:
|
Country |
China |
USA |
Russia |
Germany |
|
standard |
GB/T |
ASTM |
Doct |
DIN |
|
grade |
TC4 |
Gr5 |
BT6 |
TiAL6V |
|
grade |
TC4Eli |
Gr5ELi |
BT6C |
TiAl6v |
Comparative analysis of chemical composition differences between TC4Eli and TC4 titanium alloys ;
TC4EL is an improved version of TC4, the main difference being the different Al content and the lower content of the interstitial elements Fe, N, H, and O. The main difference is that TC4EL is a modified version of TC4.
TC4: Contains 6% α-stabilizing element Al, 4% β-stabilizing element V, and 7.0 aluminum equivalent.
TC4Eli: Significantly reduces the content of interstitial elements (C, O, N) and the impurity element Fe on a TC4 basis. For example, its oxygen content is capped at 0.13% (not explicitly reduced by the TC4 routine).
Mechanical properties and applicable environment
TC4:
Medium room temperature strength and high temperature strength, suitable for normal or high temperature environment (≤450℃).
Excellent fatigue resistance, creep resistance and thermal stability, but performance is limited in low temperature environments.
TC4Eli:
Slightly lower strength than TC4, but plasticity, toughness, fracture toughness and low-temperature performance is significantly improved, can be used in ultra-low temperature (-196 ℃) environment.
Processing process is different:
The number of melting is different, TC4 no special requirements for general melting of the second, TC4Eli must be melted three times.
Application areas
TC4:
Aero-engine compressor disk/blade, aircraft load-bearing structural parts (such as beams, bulkheads).
Applicable temperature range: -196 ~ 450 ℃ (but the low temperature performance is weaker than TC4Eli).
TC4Eli:
Low-temperature engineering (such as liquid hydrogen storage tanks), medical implants (orthopedic/dental instruments), ships and aircraft beams, and other scenarios with low-temperature or high-toughness requirements, outstanding biocompatibility, suitable for long-term implantation in the human body.
