Boze Titanium Manufacturing Center | Near-Alpha Alloy

Grade 6242 – Ti-6Al-2Sn-4Zr-2Mo Aerospace Ti Grade 6242

Ti-6Al-2Sn-4Zr-2Mo (Grade 6242, UNS R54620) — a high-temperature near-alpha titanium alloy offering exceptional creep resistance and elevated-temperature strength up to 540°C (1,000°F). Developed for advanced gas turbine engine components and high-speed airframe structures.

Read more
Entity Definition

What is Grade 6242 Titanium (Ti-6Al-2Sn-4Zr-2Mo)?

Grade 6242 (Ti-6Al-2Sn-4Zr-2Mo) is a near-alpha titanium alloy designed for high-temperature service in gas turbine engines and advanced airframes. It combines alpha-phase strength and creep resistance from aluminum and tin with solid-solution strengthening from zirconium and molybdenum. It is capable of continuous service at temperatures up to 540°C (1,000°F), significantly higher than Ti-6Al-4V.

Classification

Near-Alpha Titanium Alloy
UNS Number

UNS R54620

Common Names

Ti-6Al-2Sn-4Zr-2Mo Ti-6242 Grade 6242 UNS R54620

Key Characteristics

  • Excellent high-temperature strength up to 540°C (1,000°F)
  • Superior creep resistance for long-duration elevated-temperature service
  • Good thermal stability — minimal microstructural degradation over service life
  • Good oxidation resistance for continuous high-temperature operation
  • Weldable with proper process controls and post-weld heat treatment
  • Commonly used in the silicide-bearing variant (Ti-6242S) with 0.1% Si
Applicable Standards

Applicable Standards

Grade 6242 titanium conforms to the following international material standards:

ASTM B265 — Sheet, Strip, and Plate
ASTM B348 — Bars and Billets
ASTM B381 — Forgings
AMS 4919 — Sheet, Strip, and Plate
AMS 4975 — Bars, Wire, and Forgings
AMS 4976 — Bars, Wire, and Rings (Ti-6242S, Silicide Bearing)
Material Properties

Mechanical & Physical Properties

Typical properties for Grade 6242 Ti-6Al-2Sn-4Zr-2Mo (annealed and stabilized condition):

Tensile Strength (room temp, min) 930 MPa (135 ksi)
Yield Strength 0.2% Offset (room temp, min) 860 MPa (125 ksi)
Elongation (min) 10%
Tensile Strength (540°C) 620 MPa (90 ksi)
Yield Strength (540°C) 520 MPa (75 ksi)
Creep Rupture Life (540°C / 240 MPa) > 100 hours
Density 4.54 g/cm³ (0.164 lb/in³)
Elastic Modulus 114 GPa (16.5 × 10⁶ psi)
Melting Point 1,630–1,720°C (2,966–3,128°F)
Max Continuous Service Temperature 540°C (1,000°F)
Beta Transus 985°C (1,805°F)
Thermal Conductivity 7.5 W/(m·K)
Processing Methods

Available Processing Methods

Grade 6242 Ti-6Al-2Sn-4Zr-2Mo can be processed using the following manufacturing techniques:

Forging — Alpha-beta forging at 950–1,010°C or beta forging at 1,050–1,120°C
CNC machining — Fair; higher strength and hardness require carbide tooling
TIG welding — Acceptable with matching filler; post-weld stress relief required
Electron beam welding — Suitable for engine component fabrication
Vacuum annealing — At 980°C (1,800°F) followed by controlled cooling
Stabilization heat treatment — At 595°C (1,100°F) for 8 hours to optimize creep resistance
Hot isostatic pressing (HIP) — At 950°C / 100 MPa for cast components
Hot forming — At 730–815°C (1,350–1,500°F)
Chemical etching — HF/HNO₃ solutions with temperature control
Downstream Products

Typical Products & Components

Grade 6242 Ti-6Al-2Sn-4Zr-2Mo is commonly fabricated into the following downstream products:

Gas turbine engine components — compressor disks, blades, stators, casings
High-pressure compressor drums and spools
Engine rear frame and exhaust case structures
Afterburner components for military engines
Airframe structures in high-speed aircraft (skin panels, leading edges)
Supersonic and hypersonic vehicle structures
Rocket engine turbopump components
High-temperature fastener systems
Industries

Primary Industries

Grade 6242 Ti-6Al-2Sn-4Zr-2Mo serves as a material of choice across these industries:

Aerospace — Gas turbine engines (compressor section), advanced airframes
Defense — Military aircraft engines, missile structures
Power generation — Industrial gas turbine components
Space — Rocket engines, hypersonic vehicle structures
Chemical processing — High-temperature reactors and heat exchangers
Alternative Materials

Alternative Materials

Depending on application requirements, Grade 6242 may be substituted by:

Ti-6Al-4V (Grade 5) — Lower temperature capability (<400°C) but more cost-effective for cooler sections
Ti-6Al-2Sn-4Zr-2Mo-0.1Si (Ti-6242S) — Silicide-bearing variant with improved creep resistance
Ti-6Al-2Sn-4Zr-6Mo — Higher strength variant for deeper section hardenability
INCONEL 718 — Higher temperature capability (>650°C) at significantly higher weight and cost
Waspaloy — Higher temperature capability for turbine disk applications at higher weight
Ti-5.8Al-4Sn-3.5Zr-0.7Nb (IMI 834) — Higher-temperature near-alpha alloy for advanced engines
Why Boze Titanium Manufacturing Center

Why Choose Us for This Grade

Boze Titanium Manufacturing Center delivers Grade 6242 components for gas turbine engines with AS9100D quality systems and NDT inspection per NADCAP-compliant procedures.

Frequently Asked Questions

Common questions from engineers about this titanium grade and our precision machining capabilities.

What is Grade 6242 titanium (Ti-6Al-2Sn-4Zr-2Mo)?

Grade 6242 is a near-alpha titanium alloy designed for service up to 540°C with exceptional creep resistance for gas turbine engines.

What engine components use Grade 6242?

Grade 6242 is used for compressor disks, blades, stators, and casings in gas turbine engines.

What processing for Grade 6242?

We offer precision forging, 5-axis CNC machining, and vacuum heat treatment per AMS 2750F Class 2.

Need Grade 6242 Components?

Our engineering team delivers precision-machined components in Grade 6242. Submit your RFQ for a competitive quote within 24–48 hours.

Request a Quote All Materials Guide
Audience-first guidance

Guidance for the professionals who specify titanium

Role-specific answers and resources for engineers and buyers in this industry.

Design engineering Quality & compliance Procurement

Common questions from this audience

How do I choose the right titanium grade?

Selection depends on strength, corrosion resistance, formability and application — CP grades for corrosion, alpha-beta alloys like Ti-6Al-4V for strength, and ELI grades for medical.

Which titanium grade is best for medical implants?

Ti-6Al-4V ELI (Grade 23) per ASTM F136 is the most common implantable grade for its strength and biocompatibility.

What certifications accompany titanium material?

Mill test certificates (ASTM, AMS), EN 10204 3.1 reports and full lot traceability are provided with every shipment.

Related resources

Request a quote
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 Titanium Manufacturing Center is operated by Baoji Boze Metal Products Co., Ltd.

AS9100D ISO 13485 ISO 9001 500+ Clients 15+ Years OEM/ODM
Learn About Us Request a Quote
Explore More: Material Specifications Industry Applications All Services Capabilities