Materials

Titanium Grade 5 (Ti-6Al-4V, UNS R56400)

• Material: The most widely used titanium alloy, containing 6% aluminum and 4% vanadium. Balances high strength with low density and excellent corrosion resistance.

• Mechanical Properties:

  • Yield strength ~120–130 ksi (more than double that of commercially pure Titanium Grade 2).

  • Excellent fatigue resistance and fracture toughness.

  • Density is ~45% that of steel, enabling significant weight savings.

  • Retains useful mechanical properties up to ~800°F (425°C).

• Corrosion Resistance:

  • Very good in oxidizing environments, seawater, and chloride exposure.

  • Resistant to stress corrosion cracking and crevice corrosion.

  • Slightly less corrosion resistant than Titanium Grade 2 due to alloying, but still excellent compared to stainless steels and nickel alloys.

• Manufacturing Considerations:

  • More challenging to machine than steels due to low thermal conductivity and work hardening tendency. Requires carbide tooling, sharp edges, and slow cutting speeds.

  • Weldable with proper procedures, though heat treatment may be needed to restore properties.

  • Supplied in annealed or solution-treated and aged (STA) condition for fasteners.

• Applications in Fasteners & Components:

  • Aerospace fasteners (bolts, screws, nuts, studs) where high strength-to-weight ratio is critical.

  • Military and defense systems, including airframes, missile structures, and naval hardware.

  • Motorsports and high-performance automotive fasteners where weight savings improve performance.

  • Medical implants and equipment, leveraging both strength and biocompatibility.

  • Chemical and offshore environments requiring strong, corrosion-resistant bolting.