Ti-6Al-4V ELI

US: Ti-6Al-4V ELI (Grade 23)
UK: IMI 318 ELI 
RUS: BT6-ELI 
GER: TiAl6V4 ELI
FRA: TA6V ELI 
JPN: ST-Al40 ELI

Overview Of Ti-6Al-4V ELI

Ti-6Al-4V ELI is a titanium alloy known for its exceptional mechanical properties and biocompatibility. It is a variant of Ti-6Al-4V alloy, specifically developed for critical applications in industries such as aerospace, medical, automotive, and sports equipment manufacturing. Ti-6Al-4V ELI exhibits enhanced purity and reduced interstitial elements, making it highly desirable for various advanced applications.

Compared to other titanium alloys, Ti-6Al-4V ELI offers an excellent combination of high strength, low weight, outstanding corrosion resistance, and biocompatibility. The ELI grade ensures maximum ductility and toughness.

Key properties and characteristics of Ti-6Al-4V ELI powder:

Powder Chemical Composition (wt,-%)

Element

Range

Aluminum (Al)

5.5 – 6.5

Vanadium (V)

3.5 – 4.5

Iron (Fe)

≤ 0.25

Oxygen (O)

≤ 0.13

Carbon (C)

≤ 0.08

Nitrogen (N)

≤ 0.05

Hydrogen (H)

≤ 0.012

Titanium (Ti)

Balance

Physical Properties

Property

Value

Conditions

Density

4.43 g/cm³

Typical for titanium alloys.

Melting Point

1604–1660°C (2919–3020°F)

Broad range due to alloy phases.

Thermal Conductivity

~6.7 W/m·K

At room temperature.

Electrical Conductivity

~0.5% IACS

Poor conductor compared to copper.

Coefficient of Thermal Expansion

8.6 × 10⁻⁶ /°C

20–100°C range.

Elastic Modulus

~114 GPa

Stiffness comparable to other Ti alloys.

Mechanical Properties

Property

Typical Value

Test Conditions

Ultimate Tensile Strength

≥ 795 MPa (115 ksi)

Annealed condition, room temperature.

Yield Strength (0.2% offset)

≥ 725 MPa (105 ksi)

Annealed condition.

Elongation at Break

≥ 10%

In 50 mm gauge length. 

Reduction of Area

≥ 20%

Measures ductility.

Fracture Toughness (K<sub>IC</sub>)

~70 MPa√m

Enhanced due to ELI’s low interstitial elements.

Fatigue Strength 

~500 MPa (10⁷ cycles)

Rotating bending fatigue, polished specimen.

Hardness

~36 HRC

Rockwell C scale.

Ti-6Al-4V ELI Powder Properties

Ti-6Al-4V ELI is suitable for additive manufacturing, metal injection molding, and other powder metallurgy applications. Its fine powders enable complex geometries and thin walls in 3D printed or sintered parts.

Advantages

Enhanced Toughness: Lower oxygen and nitrogen reduce brittleness, improving fracture resistance.  

Superior Cryogenic Performance: Retains ductility at extremely low temperatures (e.g., liquid hydrogen tanks).  

Biocompatibility: Widely used in medical implants due to corrosion resistance and biocompatibility.  

Primary Applications

Area

Applications

Aerospace

Aircraft structures, engine components, space launch systems

Implants

Orthopedic implants, dental implants, maxillofacial implants

Automotive

Motorsports components, turbocharger wheels

Industrial

Marine hardware, offshore drilling parts, valves, pumps

Energy

Wellhead components, downhole tools, pipelines

Defense

Ballistic armor, weapon components, protective gear

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