Titanium Grade 23 (Ti-6Al-4V ELI): Medical Implant Grade for Orthopedics
ASTM F136 / B348 · Published: 2026-06-02 · Updated: 2026-06-02
Grade 23 ELI has tightly controlled oxygen (75 MPa√m). For hip stems, knee femoral components, spinal pedicle screws, dental implants. Osteointegrative — bone adheres directly to TiO2 surface without fibrous tissue.
Grade 23 ELI has tightly controlled oxygen (<0.13%) for maximum fracture toughness (KIC >75 MPa√m). For hip stems, knee femoral components, spinal pedicle screws, dental implants. Osteointegrative — bone adheres directly to TiO2 surface without fibrous tissue.
Quick Facts
| Category | Titanium Alloy |
| Standard | ASTM F136 / B348 |
| Density | 4430 kg/m³ |
| Yield Strength | 795 MPa |
| Tensile Strength | 860 MPa |
Global Equivalents & Cross-Reference
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Frequently Asked Questions
Grade 23 ELI vs Grade 5?
ELI has higher fracture toughness and better fatigue life due to reduced oxygen. For fatigue-critical implants (hip stems, spinal rods), ELI is specified.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu