Titanium Alloys - Plus Metals

TITANIUM ALLOYS

TITANIUM TI-6AL-4V

Titanium TI-6AL-4V Grade 5 (UNS R56400) is one of the most widely used titanium alloys, known for its excellent strength-to-weight ratio and corrosion resistance. It is commonly utilized in aerospace, automotive, and medical applications. The alloy conforms to various standards such as AMS 4911, ASTM B265, and ASME SB 265, underscoring its versatility and reliability in demanding environments.

Composition
  • Carbon (C): Max 0.08%
  • Oxygen (O): Max 0.20%
  • Nitrogen (N): Max 0.05%
  • Hydrogen (H): Max 0.125%
  • Aluminum (Al): Min 5.5%, Max 6.75%
  • Vanadium (V): Min 3.5%, Max 4.50%
  • Iron (Fe): Max 0.40%
  • Yttrium (Y): Max 0.005%
  • Titanium (Ti): Balance
Properties
  • Density: Approximately 4.43 g/cm³.
  • Thermal Conductivity: ~7 W/m·K.
  • Tensile Strength: High tensile strength and fatigue resistance.
  • Corrosion Resistance: Excellent in various environments.
Applications
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  • Widely used for aircraft components, including structural elements and fasteners, due to its high strength and low weight.
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Advantages
  • High Strength: Exceptional strength-to-weight ratio.
  • Corrosion Resistance: Highly resistant to corrosion and oxidation.
Limitations
  • Cost: Relatively high cost compared to other materials.
  • Machinability: Can be difficult to machine due to its hardness.

TITANIUM GRADE 2

Titanium Grade 2 (UNS R50400) is the most commonly used titanium grade due to its excellent weldability and moderate strength. It is often utilized in chemical processing, marine, and architectural applications. The alloy conforms to standards such as ASTM B265 and AMS 4902, highlighting its suitability for a range of industrial applications.

Composition
  • Carbon (C): Max 0.10%
  • Iron (Fe): Max 0.30%
  • Oxygen (O): Max 0.25%
  • Nitrogen (N): Max 0.03%
  • Hydrogen (H) (sheet): Max 0.015%
  • Hydrogen (H) (bar): Max 0.0125%
  • Titanium (Ti): Balance
  • Other Elements: Max 0.40%
Properties
  • Density: Approximately 4.51 g/cm³.
  • Thermal Conductivity: ~21 W/m·K.
  • Tensile Strength: Good strength and ductility.
  • Corrosion Resistance: Excellent resistance to corrosion.
Applications
  • Utilized for aircraft components, including structural parts and fasteners, due to its good strength-to-weight ratio and resistance to corrosion.
Advantages
  • Weldability: Easy to weld and form.
  • Corrosion Resistance: Highly resistant to chemical and seawater corrosion.
Limitations
  • Strength: Lower strength compared to higher grades of titanium.
  • Cost: Generally higher than some alternative materials.

TITANIUM 6-2-4-6

Titanium 6-2-4-6 (UNS R54620) is a high-strength titanium alloy known for its excellent mechanical properties and resistance to oxidation at elevated temperatures. It is used in aerospace and marine applications where strength and performance are critical. The alloy is referenced by standards such as AMS 4981 and BS TA25, which reflect its robust nature in demanding environments.

Composition
  • Carbon (C): Max 0.04%
  • Iron (Fe): Max 0.15%
  • Oxygen (O): Max 0.50%
  • Nitrogen (N): Max 0.04%
  • Hydrogen (H): Max 0.0125%
  • Aluminum (Al): Min 5.5%, Max 6.5%
  • Zinc (Zn): Min 3.5%, Max 4.5%
  • Molybdenum (Mo): Min 5.5%, Max 6.5%
  • Tin (Sn): Min 1.75%, Max 2.25%
Properties
  • Density: Approximately 4.54 g/cm³.
  • Thermal Conductivity: ~7 W/m·K.
  • Tensile Strength: High tensile strength, even at elevated temperatures.
  • Oxidation Resistance: Good resistance to oxidation at high temperatures.
Applications
  • Gas turbine engine components
  • High-performance racing engine components
  • Oil and gas production equipment
Advantages
  • High Strength: Superior strength compared to many titanium alloys.
  • Temperature Resistance: Maintains properties at elevated temperatures.
Limitations
  • Cost: Higher cost due to complex alloying.
  • Machinability: Challenging to machine due to high strength.

TITANIUM BT20

Titanium BT20 (GOST BT20) is a high-strength titanium alloy with notable fatigue resistance and thermal stability. It is used in high-performance aerospace and industrial applications. The alloy adheres to standards like DIN 3.7164 and AMS 4976, ensuring its effectiveness in specialized and high-stress environments.

Composition
  • Aluminum (Al): Min 5.5%, Max 6.5%
  • Molybdenum (Mo): Min 0.8%, Max 2.0%
  • Vanadium (V): Min 0.5%, Max 2.0%
  • Zirconium (Zr): Max 0.3%
  • Iron (Fe): Max 0.3%
  • Silicon (Si): Max 0.15%
  • Carbon (C): Max 0.1%
  • Nitrogen (N): Max 0.05%
  • Oxygen (O): Max 0.2%
  • Titanium (Ti): Balance
Properties
  • Density: Approximately 4.45 g/cm³.
  • Thermal Conductivity: ~7 W/m·K.
  • Tensile Strength: Very high strength and toughness.
  • Fatigue Resistance: Excellent fatigue resistance.
Applications
  • Titanium BT20 is used in aerospace components such as turbine blades, engine parts, and structural elements due to its excellent mechanical properties.
Advantages
  • Strength and Toughness: High strength and toughness, suitable for extreme conditions.
  • Fatigue Resistance: Excellent fatigue properties for high-stress applications.
Limitations
  • Cost: Expensive due to alloy complexity and processing.
  • Machinability: Can be difficult to machine due to its high strength.

TITANIUM ALLOYS

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