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6Al-4V ELI

6Al-4V ELI

6Al-4V ELI is one of the most widely used Titanium alloys in the medical industry. It is certified to ASTM F136, and commonly referred to as implant grade 6-4 Titanium. It's properties of biocompatibility, corrosion resistance, high strength, and toughness make it especially suitable for implants and other medical devices.

The main difference between Ti-6Al-4V ELI (Grade 23) and Ti-6Al-4V (Grade 5) is that in ELI (Extra Low Interstitials) the maximum oxygen content is lowered to 0.13%. This gives the material an improved fracture toughness. Material: Titanium

Alloy: 6AL-4V ELI Titanium

Temper: Annealed

Shape: Round Rod

Diameter: 13/16 inch

Length: 24 inches

Number of Pieces: 1 pieces

Finish: Mill

Notes: ELI | Tolerances: Length (-0/+ 3/4")


Resistant to bodily fluids.
Resistant to a variety of corrosive environments.
Freedom from chloride stress corrosion cracking.
Good strength and toughness over a wide temperature range.
High resistance to erosion corrosion and corrosion fatigue.
Useful resistance to dry chlorine, fluorine, hydrogen chloride and hydrogen fluoride gases.

One of the most commonly used titanium alloys is an alpha-beta alloy containing 6% Al and 4% V. This alloy, usually referred to as Ti 6Al-4V, exhibits an excellent combination of corrosion resistance, strength and toughness. Typical uses include medical devices or implants, aerospace applications and pressure vessels. In the case of medical applications, stringent user specifications require controlled microstructures and freedom from melt imperfections. The interstitial elements of iron and oxygen are carefully controlled to improve ductility and fracture toughness. Controlled interstitial element levels are designated ELI (extra low interstitials). Hence the designation Ti 6Al-4V ELI.

Surface Conditions

Ti 6Al-4V ELI has a tendency to stick, fret or cold weld with drawing dies during processing. Common industry practice to avoid this condition usually employs heavy etching or pickling at finish size resulting in a coarse or very textured surface. Fort Wayne Metals has developed processing techniques with enhanced surface treatments which require minimal etching at finish size to remove residual oxide, yielding a cleaner and smoother surface finish.

Diameter Tolerances

Enhanced surface treatments and processing techniques allow Fort Wayne Metals to offer tighter and more controlled tolerances. The chart in the right column details standard diameter tolerances for Ti 6Al-4V ELI in wire and coil forms. Most diameters can be produced to tighter tolerances.


MIN5.53.5   --   --  --  --      --    --     --     --       --
MAX6.      0.1     0.4Balance

Physical Properties

Density: 0.160 lb/in3

Melting Range: 2370 - 2460°F

Beta Transus: 91790+25°F

Minimum Tensile Properties, AMS 4919, Duplex Annealed

Temperature, °F






Coefficient* of Thermal Expansion, in/in°F x 10-6






Mechanical Properties

Typical hardness Rockwell: C 30-34 Specific minimums, AMS 4931, bar and forging

Representative Tensile Properties, Sheet

Diameter, in

< 3.0

< 3.0 < 4.0

< 4.0) < 6.0

Tensile Strength, ksi




0.2 % Yield Strength, ksi




Elongation, % *L (**ST)

10 (8)

10 (8)

8 (8)

Reduction of Area, % *L (**ST)

25 (–)

20 (15)

15 (15)

Typical Elevated temperature Properties

Temperature, °F

93 (200)

149 (300)

204 (400)

260 (500)

Ultimate Tensile Strength, ksi

843.3 (121)

772.2 (112)

723.9 (105)

657.7 (98)

0.2 % Yield Strength, ksi

710.2 (103)

641.2 (93)

586.1 (85)

531.0 (77)

Elongation, %






Ti 6Al-4V ELI in straightened and cut bar, coil, strands and cables, flat wire and wire form to support a variety of critical medical and industrial based applications. End uses include: Orthopaedic pins and screws, Springs, Orthopaedic cables, Surgical staples, Orthodontic appliances, Ligature clips.

Low interstitial version of Ti-6Al-4V, for maximum toughness. Preferred for marine and cryogenic applications. This grade is normally used in the annealed condition. Ti-6Al-4V is the preferred choice for the medical implant field. Stress relief 900-1200°F 1 to 4 hours, air cool. Duplex anneal, bar and forgings: Solution anneal 50-100°F below the beta transus, hold 1 hour minimum, air cool. Then reheat within the range 1300-1400°F, hold 1 hour minimum, air cool. Stress - relief annealing is performed after welding.

6AL-4V Titanium is a lighweight, high strength alloy. It is the most commonly used titanium alloy is use. ELI is a higher purity version of the same material, with tighter tolerances on imperfections in the alloy.

6Al-4V ELI Pictures


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