Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (BT9)Titanium Bar
Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (grade BT9/TC11) is a heat-strength α+β titanium alloy with excellent high-temperature strength and creep resistance at 500℃. It is mainly used in critical hot-end components such as compressor disks and blades in aero-engines and is a key material in the aerospace field.
Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (BT9)Titanium Bar details
Chemical Composition and Performance Characteristics
The chemical composition of TC11 (BT9) Titanium Alloy is: titanium (Ti) approximately 80.5% or more, aluminum (Al) 6.5%, molybdenum (Mo) 3.5%, zirconium (Zr) 1.5%, and silicon (Si) 0.3%. This unique compositional configuration achieves a good balance between strength and toughness.
Mechanical Properties:
• Tensile Strength: ≥1030MPa
• Yield Strength: ≥1000MPa
• Elongation: ≥10%
• Density: 4.43g/cm³
• Operating Temperature Range: -100~500℃
Heat Treatment Process
The heat treatment process for TC11 (BT9) (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy mainly includes:
• Annealing: Holding at 700-800℃ for 1-2 hours followed by air cooling
• Solution Aging: Solution treatment at 900-950℃ followed by water quenching, then aging at 480-550℃ for 4-8 hours
• Phase transition temperature: (α+β)/β phase transition point is 1000-1020℃
Application Areas
Aerospace Industry
Primarily used in the manufacture of key components such as aircraft engine compressor discs, blades, compressor discs, and hub sleeves, highly favored for its lightweight, high strength, and high-temperature resistance.
Medical Device Industry
Widely used in the manufacture of medical implants, such as joint replacements and dental implants, thanks to the excellent biocompatibility and corrosion resistance of Titanium Alloys.
Chemical and Marine Engineering
Exhibiting excellent corrosion resistance in petrochemical and marine environments, suitable for manufacturing equipment such as reactors, heat exchangers, and seawater desalination plants.
Standards Applied
TC11 (BT9) (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium bars conform to the following standards:
• Chinese Standards: GB/T 2965-2007, GB/T 13810
• American Standards: ASTM B348, ASTM F136, AMS4928
Processing Characteristics
TC11 (BT9) (Ti-6.5Al-3.5Mo-1.5Zr-0.3Si) titanium alloy exhibits highly temperature-sensitive deformation resistance, with a narrow hot deformation temperature range, making high-temperature deformation difficult. The alloy undergoes complex microstructure evolution during thermoplastic forming, requiring strict control of process parameters to achieve ideal microstructure and mechanical properties.
With its excellent comprehensive performance and broad application prospects, this alloy has become an indispensable key material in modern high-end manufacturing, playing a vital role in promoting technological progress and industrial upgrading.
Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (BT9/TC11) titanium rod is a 500℃ high-temperature titanium alloy, specially designed for manufacturing compressor disks, blades and aerospace structural components for aero-engines. It has excellent thermal strength and creep resistance, making it an ideal material for key rotating components in the aerospace field.
