Ti 6Al 4V ELI (Grade 23)

Ti-6Al-4V ELI (Grade 23) — Engineering & Procurement Topic Overview (5 Articles)

Ti-6Al-4V ELI (Grade 23, UNS R56401) is the Extra Low Interstitial version of standard Grade 5 titanium. By restricting maximum oxygen to 0.13 wt% (compared to 0.20 wt% in Grade 5) and iron to 0.25 wt% through Triple-VAR (Vacuum Arc Remelting) ingot processing, Grade 23 achieves superior plane-strain fracture toughness, fatigue crack growth resistance, and cryogenic ductility down to -253°C.

Certified to ASTM F136, ISO 5832-3, and AMS 4930 / AMS 4907, Ti-6Al-4V ELI is the mandatory choice for fracture-critical orthopedic implants, damage-tolerant aircraft bulkheads, cryogenic liquid hydrogen valves, and thin-wall bionic actuator shafts. Browse the engineering analyses below covering ELI melt verification, beta-transus heat treatment, and grade comparisons.