High-temperature resistant titanium alloy TC11 bars and machined parts

TC11 is an α+β type heat-resistant titanium alloy. Its core characteristics include excellent long-term heat resistance at 500℃, high room temperature strength, low density, excellent fatigue resistance, and good processability. It is primarily used for hot-end components in aero-engines.

I. Basic Composition (Nominal)
Ti-6.5Al-3.5Mo-1.5Zr-0.3Si
Aluminum (Al): Solid solution strengthening, improved heat resistance; Molybdenum (Mo): Strong β-stabilization, creep resistance; Zirconium (Zr): Refines microstructure, stabilizes phase; Silicon (Si): Creep resistance, heat resistance.

II. Core Physical and Mechanical Properties (Bar Stock, Annealed)
Density: 4.48～4.51 g/cm³ (60% of steel)
Phase Transformation Point: 1000±20 ℃
Room Temperature Mechanical Properties:
Tensile Strength ≥1030 MPa (typical 1050–1100 MPa)
Yield Strength ≥900 MPa
Elongation ≥10%, Reduction of Area ≥30%
Hardness: HB 331–343 / HV 320–380
High Temperature Strength (500℃):
Tensile Strength ≥600 MPa
Creep Strength (100h) ≥590 MPa
Creep Resistance: 450℃/150MPa, 1000h creep rate ≈0.1%
Low Temperature Toughness: Maintains good toughness even at -253℃.

III. Microstructure and Heat Treatment Characteristics

Microstructure: Bipolar (α+β), annealed state is equiaxed α+ transforming to β; heat treatment can control the α/β ratio and morphology.

Recommended Heat Treatment: 950℃/2h air cooling + 530℃/8h air cooling, balancing strength and toughness.

Hot Working: Good forging/rolling/isothermal forging performance; weldable, machinable, and exhibits excellent superplasticity.

IV. Corrosion Resistance and Environmental Characteristics
Resistant to seawater, nitric acid, dilute sulfuric acid, and alkaline media (pH≤12).

Not resistant to hydrofluoric acid, concentrated hydrochloric acid, and high-temperature reducing acids.

The microstructure is stable below 500℃; oxidation intensifies above 700℃.

V. Typical Applications

Aero-engines: Compressor discs, blades, drums, journals (long-term 500℃).

Aircraft structural components: High-load, high-temperature resistant, and weight-reducing components.

High-end equipment: Key components requiring high strength, heat resistance, and fatigue resistance.

VI. Comparison with Commonly Used Titanium Alloys (Key Points)

TC11 vs TC4 (Ti-6Al-4V): TC11 has significantly higher high-temperature strength and creep resistance (usable at 500℃, while TC4 is only ≤350℃), slightly higher room temperature strength, and a higher price.

TC11 vs TA15: TC11 has superior heat resistance and is stable at 500℃ for extended periods; TA15 is more suitable for medium-temperature (≤450℃) structural components.

Quality Control and Testing

Each product undergoes rigorous inspection before shipment:

Dimensional Inspection: Precise measurement of thickness, length, and width

Chemical Composition and Mechanical Property Analysis: Third-party testing reports

Surface Inspection: Visual and microscopic inspection for defects

Ultrasonic Testing: Detection of internal defects

Why Choose Us

Technology and Quality: Located in Baoji, China's Titanium Valley, we possess professional production technology and extensive experience in non-ferrous metal manufacturing.

Global Coverage: We provide consistently high-quality products to customers in Australia, South Korea, Germany, the USA, the UK, Malaysia, and the Middle East.

Quality Commitment: We never compromise on quality and are responsible for every product we manufacture.

Technical Support: We have professional personnel overseeing the entire process from raw materials to finished products!

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

Email: lucky@bjfreelong.com

WhatsApp: +86 13335371763

Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.