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
Ti-6Al-4V-ELI is the extra-low-interstitial (ELI) version of the Ti-6Al-4V alpha-beta titanium alloy. This datasheet presents the material within the American (ASTM / ASME / UNS) standard system.
A higher-purity grade of Ti-6Al-4V (Grade 5), Ti-6Al-4V-ELI is produced by careful selection of raw materials 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 standard Grade 5. With its excellent biocompatibility, good fatigue strength and low modulus, it has long been the material of choice for medical and dental applications. It retains the same alpha-beta microstructure and heat-treatability as Grade 5 and is normally used in the annealed condition.
Typical applications include orthopedic implants and prostheses, surgical instruments and dental components, and marine, cryogenic and critical aerospace parts.
| 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; lower than Grade 5 |
| 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 ASTM F136 for UNS R56407.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (UTS) | ≥860 MPa (125 ksi) |
| Annealed | 0.2% yield strength | ≥795 MPa (115 ksi) |
| Annealed | Elongation at break | ≥10 % |
| Annealed | Reduction of area | ≥25 % |
| Annealed | Hardness | ~30–34 HRC |
Confirm against the mill test report. Slightly lower strength than standard Grade 5, with superior fracture toughness and cryogenic properties.
| 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 | AWS A5.16 ERTi-23 (matching) |
| GMAW / MIG | Good | ERTi-23 |
| 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 standard Grade 5 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 | ASTM Standard | AMS |
|---|---|---|
| Surgical implant stock | ASTM F136 | AMS 4930 |
| Bar, billet and forgings | ASTM B348 (Grade 23) | — |
| Sheet, strip and plate | ASTM B265 (Grade 23) | — |
| Welding wire | AWS A5.16 ERTi-23 | — |
Ti-6Al-4V ELI (extra-low-interstitial) alpha-beta titanium alloy. UNS R56407.
| Grade | Al % | O max % | Type | Best Used For |
|---|---|---|---|---|
| Ti-6Al-4V-ELI | 5.5–6.5 | 0.13 | Alpha-beta | Ti-6Al-4V ELI; higher purity, implants, fracture toughness, cryogenic |
| Ti-6Al-4V | 5.5–6.75 | 0.20 | Alpha-beta | Most-used alloy, higher strength (Grade 5) |
| Ti-3Al-2.5V | 2.5–3.5 | 0.15 | Near-alpha | Tubing, cold formable (Grade 9) |
| Ti-5Al-2.5Sn | 4.5–5.75 | 0.20 | Near-alpha | Weldable, high-temperature (Grade 6) |
| Ti-CP Grade 2 | — | 0.25 | CP (unalloyed) | Workhorse commercially pure titanium |
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