Titanium Ti64Al4V ELI

Metal 3d printing witn Titanium Ti6Al4V

Grade 23 titanium, also known as Ti-6Al-4V-ELI, has excellent mechanical properties and corrosion resistance combined with low specific weight and Titanium Ti-6Al-4V-ELI has excellent mechanical properties and corrosion resistance combined with low specific weight and biocompatibility.

ELI is an acronym for Extra Low Interstitial, indicating that this alloy has a very low amount of interstitial elements (carbon, oxygen, nitrogen, hydrogen). The interstitial elements are inserted in the crystalline lattice of the material making the structure more fragile and reducing elongation at break; however, they also result in an increase in the mechanical properties, for this reason, it is preferable to vary the amount according to the alloy’s intended use.

If an extremely ductile and tough material is required, the interstitial elements should be reduced as much as possible, just as it was done for grade 23 titanium which contains 6% aluminium, 4% vanadium, 0.13% (maximum) of oxygen and the rest titanium. Also, grade 23 titanium has better ductility than grade 5.

This material is ideal for many high-performance engineering applications, for example in aero-space and motor racing, and also for the production of biomedical implants. Standard processing parameters use full melting of the entire geometry. Parts built from Titanium Ti-6Al-4V-ELI can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required.

Mechanical Properties Test Method As Built Annealing
Tensile strength ASTM E8 1200 ± 40 MPa 1059 ± 43 MPa
Proof stress (Rp0.2) ASTM E8 1013 ± 55 MPa 973 ± 68 MPa
Elongation at Break ASTM E8 8 ± 2% 10 ± 2%
Young’s Modulus ASTM E8 113 ± 8 GPa 115 ± 5 GPa
Hardness ISO 6508-1 46 ± 3 HRC 45 ± 3 HRC
Chemical Composition and Physical Properties    
Chemical composition Ti
5,5 - 6,75%
3,5 - 4,5%
≤ 0,13%
≤ 0,05%
≤ 0,08%
≤ 0,012%
≤ 0,25%
Physical Properties Relative density Approx. 99,99 %
  Density 4,41 g/cm3
Heat Treatment Temperature Time Atmosphere
Annealing RT -> 840° 4h Inert/Vacuum
  840°C 2h Inert/Vacuum
  840°C -> RT - Inert