Titanium 6246 / 3.7191 / Grade 18 / UNS R56260

Titanium Alloy 6246 (Ti-6Al-2Sn-4Zr-6Mo) │ UNS R56260: Superior Strength and Thermal Resistance

General Technical Characteristics

Titanium alloy 6246 (Ti-6Al-2Sn-4Zr-6Mo) is a high-strength α+β alloy designed for use in high-temperature and high-load environments. This material features an optimal combination of strength, toughness, and creep resistance at elevated temperatures. 6246 alloy demonstrates excellent property stability and high corrosion resistance.

Chemical Composition

The chemical composition of the alloy includes:

• Aluminum (Al): 5.5-6.5%
• Tin (Sn): 1.8-2.2%
• Zirconium (Zr): 3.6-4.4%
• Molybdenum (Mo): 5.5-6.5%
• Titanium (Ti): base

Impurities (max.):

• Oxygen: 0.15%
• Nitrogen: 0.04%
• Carbon: 0.04%
• Iron: 0.15%

Mechanical Properties

Key mechanical characteristics:

• Tensile Strength: 1170-1380 MPa
• Yield Strength: 1100-1275 MPa
• Elongation: 8-12%
• Modulus of Elasticity: 114-120 GPa
• Hardness: 35-45 HRC
• Impact Toughness: 20-30 J/cm²

Applications

6246 alloy is widely used in:

• Aerospace industry
• Gas turbine engines
• Compressor blades
• Compressor discs
• Fastening elements
• Structural components
• Space technology
• High-temperature applications

Material Features

Key advantages of 6246 alloy:

• High specific strength
• Excellent thermal stability
• Superior corrosion resistance
• Good machinability
• High creep resistance
• Property stability at elevated temperatures
• Good weldability
• High fatigue strength

The material retains its properties at temperatures up to 450°C, making it ideal for high-temperature components.

Heat Treatment

Recommended heat treatment conditions:

• Annealing: 700-750°C
• Quenching: 880-920°C
• Aging: 590-610°C

Technological Features

6246 alloy is characterized by:

• Good machinability
• Weldability in a protective atmosphere
• Capability for cold and hot deformation
• Dimensional stability during heat treatment

Conclusion

Titanium alloy 6246 (UNS R56260) is a modern structural material combining high strength, thermal resistance, and excellent corrosion resistance. These characteristics make it an optimal choice for critical aerospace and space industry components that operate under high temperatures and heavy loads.

Supply Forms of Titanium 6246 (6-2-4-6) │ UNS R56260