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
R54520 is a near-alpha titanium alloy containing about 5% aluminium and 2.5% tin (Ti-5Al-2.5Sn). This datasheet presents the material within the American (ASTM / ASME / UNS) standard system.
With aluminium and tin as the principal alloying additions, R54520 offers medium strength with excellent weldability and fabricability, good oxidation resistance and good microstructural stability at elevated temperature. As a near-alpha alloy it is not strengthened by heat treatment — properties are developed by annealing — but it retains strength and stability up to a service temperature of about 480 °C, considerably higher than the commercially pure grades. An extra-low-interstitial (ELI) version is widely used for cryogenic applications because it retains toughness at very low temperatures. It combines this performance with the excellent corrosion resistance characteristic of titanium.
Typical applications include aircraft gas-turbine engine components, airframe structures and sheet-metal parts, high-temperature and elevated-stress assemblies, and (in the ELI version) cryogenic vessels and components.
| Property | Value | Unit |
|---|---|---|
| Density | 4.48 | g/cm³ |
| Melting range | 1590–1650 | °C |
| Elastic modulus | 110 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 9.4 | µm/m·°C |
| Thermal conductivity (20 °C) | 7.8 | W/m·K |
| Specific heat (20 °C) | 502 | J/kg·K |
| Structure | Near-alpha (hexagonal close-packed) | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Titanium | Ti | Balance | — | Base element |
| Aluminium | Al | 4.50 | 5.75 | Alpha stabiliser; strength |
| Tin | Sn | 2.00 | 3.00 | Solid-solution strengthening |
| Iron | Fe | — | 0.50 | Residual |
| Oxygen | O | — | 0.20 | Interstitial; strength |
| Carbon | C | — | 0.08 | Interstitial impurity |
| Nitrogen | N | — | 0.05 | Interstitial impurity |
| Hydrogen | H | — | 0.020 | Interstitial impurity |
Annealed condition, per ASTM B265 for UNS R54520.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (UTS) | ≥827 MPa (120 ksi) |
| Annealed | 0.2% yield strength | ≥793 MPa (115 ksi) |
| Annealed | Elongation at break | ≥10 % |
| Annealed | Reduction of area | ≥25 % |
| — | Elastic modulus | 110 GPa |
Confirm against the mill test report. Not strengthened by heat treatment; properties are set by annealing.
| Environment | Performance | Notes |
|---|---|---|
| Atmospheric / general | Excellent | Titanium oxide film |
| Seawater / marine | Excellent | Resists chloride attack |
| Oxidizing acids | Excellent | Stable passive film |
| Oxidation (elevated temperature) | Very Good | Stable to ~480 °C service |
| Chloride stress-corrosion cracking | Good | Generally resistant |
Corrosion resistance is characteristic of titanium — excellent in seawater, chlorides and oxidizing media — combined with good high-temperature oxidation resistance and microstructural stability.
A near-alpha titanium alloy; not hardenable by heat treatment. Properties are set by annealing.
Anneal Anneal at approximately 720–845 °C for about 4 hours and air cool. For intermediate stress relief, heat to approximately 540–650 °C for about 1 hour and air cool. Protect from oxygen, nitrogen and hydrogen pickup at temperature.
Good weldability with inert-gas processes; the weld and cooling weld must be fully shielded from atmospheric contamination, which causes embrittlement. Matching filler is used.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Good | Matching Ti-5Al-2.5Sn filler |
| GMAW / MIG | Good | Matching filler |
| EBW / plasma | Good | Autogenous or matching filler |
Use full inert-gas shielding and clean, contamination-free surfaces; avoid hydrogen, oxygen and nitrogen pickup.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Difficult; slow speeds, high feed, high coolant flow |
| Tooling | Tungsten carbide (C1–C4) or cobalt high-speed tools |
| Coolant | Generous non-chlorinated coolant flow |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Power brake, hydropress, stretch or drop-hammer methods |
| Hot forming | Performed hot; anneal afterward; protect from contamination |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Aerospace engine | Gas-turbine engine components | Strength + stability to ~480 °C |
| Airframe | Sheet-metal parts, structures | Strength-to-weight + weldability |
| Cryogenic (ELI) | Cryogenic vessels and components | Toughness at low temperature |
| High-temperature | Elevated-stress assemblies | Oxidation resistance + stability |
| Product Form | ASTM Standard | AMS |
|---|---|---|
| Strip, sheet and plate | ASTM B265 (Grade 6) | AMS 4910 |
| Bar and billet | ASTM B348 (Grade 15) | AMS 4926 |
| Forgings | ASTM B381 (Grade 15) | AMS 4966 |
| Welding wire | AWS A5.16 (matching) | — |
Ti-5Al-2.5Sn near-alpha titanium alloy. UNS R54520.
| UNS | Al % | Other | Type | Best Used For |
|---|---|---|---|---|
| R54520 | 4.5–5.75 | Sn 2–3 | Near-alpha | Ti-5Al-2.5Sn; weldable, stable to ~480 °C, cryogenic (ELI) |
| R56400 | 5.5–6.75 | V 3.5–4.5 | Alpha-beta | Ti-6Al-4V; most-used high-strength alloy (Grade 5) |
| R56320 | 2.5–3.5 | V 2–3 | Near-alpha | Ti-3Al-2.5V; tubing (Grade 9) |
| R50400 | — | — | CP (unalloyed) | Workhorse commercially pure titanium (Grade 2) |
| R53400 | — | Mo 0.2–0.4, Ni 0.6–0.9 | Near-alpha | Enhanced-corrosion CP-type titanium (Grade 12) |
+86 021 3355 6635
+86 133 7189 7780
zcalloy1001@gmail.com
Building E265, No. 2, Lane 158, Gangye Road, Xiaokunshan Town, Songjiang District, Shanghai
