BOZE CNC Ti | Alpha Titanium Alloy

Grade 6 – Ti-5Al-2.5Sn Titanium Alloy Grade 6

Ti-5Al-2.5Sn (Grade 6, UNS R54520) — a near-alpha titanium alloy stabilized with aluminum and tin offering excellent elevated-temperature strength, oxidation resistance, and creep performance up to 480°C (900°F) with superior weldability.

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Entity Definition

What is Grade 6 Titanium (Ti-5Al-2.5Sn)?

Grade 6 (Ti-5Al-2.5Sn) is a near-alpha titanium alloy stabilized with 5% aluminum and 2.5% tin. It offers an excellent combination of medium strength, oxidation resistance, and creep strength at elevated temperatures up to 480°C (900°F). Its alpha-phase microstructure provides superior weldability and thermal stability compared to alpha-beta alloys.

Classification

Near-Alpha Titanium Alloy
UNS Number

UNS R54520

Common Names

Ti-5Al-2.5Sn Grade 6 UNS R54520 AMS 4926

Key Characteristics

  • Excellent elevated-temperature strength and creep resistance up to 480°C
  • Good oxidation resistance for continuous high-temperature service
  • Superior weldability compared to alpha-beta alloys
  • Medium strength with good ductility and formability
  • Excellent thermal stability — no significant embrittlement after prolonged thermal exposure
  • Good corrosion resistance in oxidizing environments
Applicable Standards

Applicable Standards

Grade 6 titanium conforms to the following international material standards:

ASTM B265 — Sheet, Strip, and Plate
ASTM B348 — Bars and Billets
ASTM B381 — Forgings
AMS 4926 — Bars, Wire, and Forgings
AMS 4910 — Sheet, Strip, and Plate
DIN 17851 — Ti-5Al-2.5Sn
Material Properties

Mechanical & Physical Properties

Typical room-temperature and elevated-temperature properties for Grade 6 Ti-5Al-2.5Sn (annealed condition):

Tensile Strength (min, room temp) 790 MPa (115 ksi)
Yield Strength 0.2% Offset (min) 760 MPa (110 ksi)
Elongation (min) 10%
Reduction of Area 25%
Hardness (HRC) ≤ 36 HRC
Density 4.48 g/cm³ (0.162 lb/in³)
Elastic Modulus 110 GPa (15.9 × 10⁶ psi)
Melting Point 1,600–1,700°C (2,912–3,092°F)
Max Continuous Service Temperature 480°C (900°F)
Creep Resistance Good up to 480°C / 170 MPa
Thermal Conductivity 7.5 W/(m·K)
Processing Methods

Available Processing Methods

Grade 6 Ti-5Al-2.5Sn can be processed using the following manufacturing techniques:

CNC machining — Good; machines better than Ti-6Al-4V due to alpha-phase stability
TIG welding — Excellent; lower susceptibility to weld cracking than alpha-beta alloys
Laser welding — Good quality with standard titanium welding practices
Forging — At 950–1,050°C (1,742–1,922°F) with controlled cooling
Hot forming — At 650–760°C (1,200–1,400°F)
Cold forming — Limited; requires annealing between operations
Annealing — At 720–845°C (1,325–1,550°F) with air cooling
Chemical etching — Standard HF/HNO₃ solutions
Downstream Products

Typical Products & Components

Grade 6 Ti-5Al-2.5Sn is commonly fabricated into the following downstream products:

Aircraft engine components — compressor cases, vanes, ducts
Airframe structures near engine nacelles and exhaust areas
High-temperature fasteners for hot-section assembly
Missile and rocket components experiencing aerodynamic heating
Chemical processing equipment for high-temperature service
Automotive exhaust system components
Heat-affected zone components in welded assemblies
Industries

Primary Industries

Grade 6 Ti-5Al-2.5Sn serves as a material of choice across these industries:

Aerospace — Engine components, airframe hot-sections, missile structures
Defense — High-temperature missile and propulsion systems
Chemical processing — High-temperature reactors and heat exchangers
Automotive — Performance exhaust systems and heat shields
Power generation — Gas turbine hot-gas path components
Marine — High-temperature exhaust system components
Alternative Materials

Alternative Materials

Depending on application requirements, Grade 6 may be substituted by:

Grade 5 (Ti-6Al-4V) — Higher room-temperature strength but lower elevated-temperature capability
Ti-6Al-2Sn-4Zr-2Mo (Grade 6242) — Superior high-temperature performance for advanced engines
INCONEL 718 — Higher temperature capability at significantly higher weight and cost
Ti-8Al-1Mo-1V — Higher-temperature alpha alloy alternative
Stainless Steel 321 — Lower-cost alternative for moderate temperature service
Why BOZE CNC Ti

Why Choose Us for This Grade

BOZE CNC Ti manufactures precision Grade 6 components for aerospace and high-temperature applications with AS9100D quality systems and NADCAP NDT.

Related Components

1 precision CNC machined components manufactured from Grade 6 - Ti-5Al-2.5Sn Titanium Alloy

Titanium Cryogenic Tank Clamp Band

Propellant tank clamp band (Ti-5Al-2.5Sn ELI)

5-axis CNC roughing for cryogenic hardware geometryHeat treatment (STA) at 200W fiber laserWire EDM contour profiling at 200W fiber laserCMM per AS9102 at 200W fiber laser

Need Grade 6 Components?

Our engineering team delivers precision-machined components in Grade 6. Submit your RFQ for a competitive quote within 24–48 hours.

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About Boze Titanium Manufacturing Center

One Metal. One Focus. Infinite Precision.

Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.

Boze CNC Ti is the dedicated titanium manufacturing center of Baoji Boze Metal Products Co., Ltd.

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