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
3.7165 is the German material number for the alpha-beta titanium alloy containing about 6% aluminium and 4% vanadium (Ti-6Al-4V). This datasheet presents the material within the Werkstoff-Nummer (DIN / EN) designation system.
More than half of all titanium products worldwide are made from this alloy. 3.7165 combines high specific strength, excellent corrosion resistance, good weldability and excellent biocompatibility. The aluminium stabilises and strengthens the alpha phase while the vanadium stabilises the beta phase, giving a two-phase alpha-beta microstructure that can be strengthened by heat treatment (solution treatment and ageing) as well as used in the annealed condition. It is generally supplied mill-annealed, which gives the best combination of strength, toughness and ductility; it is age-hardenable in section thicknesses up to about 25 mm.
Typical applications include aero-engine and airframe components, offshore oil-and-gas and marine equipment, power-generation parts, motorsport components, and medical implants.
| Property | Value | Unit |
|---|---|---|
| Density | 4.43 | g/cm³ |
| Melting range | 1604–1660 | °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 | 6.75 | Alpha stabiliser; strength |
| Vanadium | V | 3.50 | 4.50 | Beta stabiliser; strength, heat-treatability |
| Iron | Fe | — | 0.30 | Residual |
| Oxygen | O | — | 0.20 | Interstitial; strength |
| Carbon | C | — | 0.08 | Interstitial impurity |
| Nitrogen | N | — | 0.05 | Interstitial impurity |
| Hydrogen | H | — | 0.015 | Interstitial impurity |
Per DIN 17850 / EN reference data for W.Nr. 3.7165.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (Rm) | ≥895 MPa |
| Annealed | 0.2% proof strength (Rp0.2) | ≥828 MPa |
| Annealed | Elongation (A5) | ≥10 % |
| Solution treated & aged | Tensile strength (Rm) | up to ~1170 MPa |
| — | Elastic modulus | 114 GPa |
Values per DIN 17850; strength can be raised by solution treatment and ageing in sections up to about 25 mm. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| Seawater / marine | Excellent | Resists chloride attack |
| Atmospheric / general | Excellent | Titanium oxide film |
| Oxidizing acids | Excellent | Stable passive film |
| Wet chlorine / chlorine dioxide | Very Good | Good resistance |
| Elevated temperature | Good | Usable to ~400 °C |
Corrosion resistance is characteristic of titanium — excellent in seawater, marine atmospheres and oxidizing media — combined with high strength and excellent biocompatibility for implants.
An alpha-beta titanium alloy; can be used annealed or strengthened by solution treatment and ageing.
Solution Treatment Solution treat at approximately 900–955 °C (below the beta transus) and quench. Mill annealing (~700–785 °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. The response to ageing is effective in sections up to about 25 mm. 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 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 | Difficult even when annealed; limited |
| Hot forming | ~540–760 °C (creep/hot forming); finish-forge from ~954 °C |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aerospace | Turbine and airframe components | Specific strength + fatigue resistance |
| Oil & gas / marine | Offshore and marine equipment | Corrosion resistance + strength |
| Medical | Implants, prostheses | Biocompatibility + strength |
| Power / motorsport | High-performance components | Strength-to-weight |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Sheet, strip and plate | DIN 17860 · W.Nr. 3.7165 | TiAl6V4 |
| Bar, rod and forgings | DIN 17851 · W.Nr. 3.7165 | — |
| Surgical implant stock | ISO 5832-3 · W.Nr. 3.7165 | — |
| Inspection documents | EN 10204 | — |
Ti-6Al-4V alpha-beta titanium alloy. W.Nr. 3.7165 (TiAl6V4).
| W.Nr. | Al % | V % | Type | Best Used For |
|---|---|---|---|---|
| 3.7165 | 5.5–6.75 | 3.5–4.5 | Alpha-beta | Ti-6Al-4V; most-used alloy, high strength, heat-treatable |
| 3.7164 | 5.5–6.75 | 3.5–4.5 | Alpha-beta | Ti-6Al-4V; controlled-interstitial variant |
| 3.7195 | 2.5–3.5 | 2–3 | Near-alpha | Ti-3Al-2.5V; tubing, cold formable (Grade 9) |
| 3.7145 | 6 | — | Near-alpha | Ti-6Al-2Sn-4Zr-2Mo; high-temperature |
| 3.7035 | — | — | CP (unalloyed) | Workhorse commercially pure titanium (Grade 2) |
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