Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
TiAl6V4A is the EN symbol designation for the extra-low-interstitial (ELI) version of the Ti-6Al-4V alpha-beta titanium alloy. This datasheet presents the material within the EN symbol designation system.
A higher-purity form of the Ti-6Al-4V alloy, TiAl6V4A is produced with lower specified limits on oxygen, carbon and iron. These reduced interstitials give superior damage tolerance — higher fracture toughness, a slower fatigue-crack-growth rate, and improved ductility — together with better mechanical properties at cryogenic temperatures, at the cost of slightly lower strength than the standard alloy. With its excellent biocompatibility, good fatigue strength and low modulus, it is widely used for surgical implants under ISO 5832-3. It retains the same alpha-beta microstructure and heat-treatability as the standard grade and is normally used in the annealed condition.
Typical applications include orthopedic and dental implants and prostheses, surgical instruments, and marine, cryogenic and critical structural components.
| Property | Value | Unit |
|---|---|---|
| Density | 4.43 | g/cm³ |
| Beta transus | 977 | °C |
| Elastic modulus | 114 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 8.6 | µm/m·°C |
| Thermal conductivity (20 °C) | 6.7 | W/m·K |
| Specific heat (20 °C) | 526 | J/kg·K |
| Structure | Alpha-beta | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Titanium | Ti | Balance | — | Base element |
| Aluminium | Al | 5.50 | 6.50 | Alpha stabiliser; strength |
| Vanadium | V | 3.50 | 4.50 | Beta stabiliser; strength, heat-treatability |
| Iron | Fe | — | 0.25 | Residual; low (ELI) |
| Oxygen | O | — | 0.13 | Interstitial; controlled low (ELI) |
| Carbon | C | — | 0.08 | Interstitial impurity |
| Nitrogen | N | — | 0.03 | Interstitial impurity |
| Hydrogen | H | — | 0.012 | Interstitial impurity |
Annealed condition, per ISO 5832-3 / EN reference data for TiAl6V4A.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (Rm) | ≥860 MPa |
| Annealed | 0.2% proof strength (Rp0.2) | ≥795 MPa |
| Annealed | Elongation (A5) | ≥10 % |
| Annealed | Reduction of area (Z) | ≥25 % |
| — | Elastic modulus | 114 GPa |
Values per ISO 5832-3; slightly lower strength than the standard alloy, with superior fracture toughness and cryogenic properties. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| Body fluids / physiological | Excellent | Biocompatible; implant-grade |
| Seawater / marine | Excellent | Resists chloride attack |
| Atmospheric / general | Excellent | Titanium oxide film |
| Oxidizing acids | Excellent | Stable passive film |
| Cryogenic service | Excellent | Retains toughness at low temperature |
Corrosion resistance is characteristic of titanium — excellent in seawater and physiological media — combined with the excellent biocompatibility and damage tolerance that make the ELI grade the preferred implant material.
An alpha-beta titanium alloy; can be used annealed or strengthened by solution treatment and ageing. Normally supplied annealed.
Solution Treatment Solution treat at approximately 900–955 °C (below the beta transus, ~977 °C) and quench. Annealing at approximately 705–790 °C (air cool) is used for the standard annealed condition.
Ageing Age at approximately 480–595 °C to precipitate fine alpha and develop higher strength where required. Protect from oxygen, nitrogen and hydrogen pickup at temperature.
Weldable by inert-gas processes; the weld pool and cooling weld must be fully shielded from atmospheric contamination, which causes embrittlement. Post-weld stress relief or annealing is commonly applied.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Good | Matching Ti-6Al-4V ELI filler |
| GMAW / MIG | Good | Matching filler |
| EBW / laser / resistance | Good | Autogenous or matching filler |
Use full inert-gas shielding and clean, contamination-free surfaces; avoid hydrogen, oxygen and nitrogen pickup. Post-weld heat treatment is common.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Difficult; slow speeds, heavy feeds, rigid tooling |
| Coolant | Large volume of non-chlorinated cutting fluid |
| Note | Practices similar to austenitic stainless steel |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Better than the standard alloy but still difficult cold |
| Hot forming | ~540–650 °C (creep/hot forming); finish-forge from ~954 °C |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Medical | Orthopedic implants, prostheses, bone screws | Biocompatibility + fracture toughness |
| Dental | Dental implants and components | Biocompatibility |
| Aerospace | Critical damage-tolerant components | Fracture toughness + fatigue resistance |
| Marine / cryogenic | Offshore and low-temperature parts | Corrosion resistance + cryogenic toughness |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Surgical implant stock | ISO 5832-3 | Ti-6Al-4V ELI |
| Sheet, strip and plate | DIN 17860 | TiAl6V4A |
| Bar, rod and forgings | DIN 17851 | — |
| Inspection documents | EN 10204 | — |
Ti-6Al-4V ELI (extra-low-interstitial) alpha-beta titanium alloy. EN symbol TiAl6V4A.
| EN Symbol | Al % | O max % | Type | Best Used For |
|---|---|---|---|---|
| TiAl6V4A | 5.5–6.5 | 0.13 | Alpha-beta | Ti-6Al-4V ELI; higher purity, implants, fracture toughness, cryogenic |
| TiAl6V4 | 5.5–6.75 | 0.20 | Alpha-beta | Ti-6Al-4V; standard grade, higher strength |
| TiAl3V2.5 | 2.5–3.5 | 0.15 | Near-alpha | Ti-3Al-2.5V; tubing, cold formable (Grade 9) |
| TiAl5Sn2.5 | 4.5–5.75 | 0.20 | Near-alpha | Ti-5Al-2.5Sn; weldable, high-temperature (Grade 6) |
| Ti99.5 | — | 0.25 | CP (unalloyed) | Workhorse commercially pure titanium (Grade 2) |
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