This article explains how the 2026 revision of ASTM F136 defines true implant-grade Ti‑6Al‑4V ELI (Grade 23) titanium, and compares it with CoCr, niobium, and titanium–zirconium alloys in terms of chemistry, mechanical performance, and sensitisation risk for body jewelry. It translates orthopedic implant standards into concrete studio rules for choosing bar stock, managing nickel allergy, and deciding when alternative alloys are justified.
Read the full article: ASTM F136 Titanium ELI vs CoCr, Niobium, and Zirconium: What Implant-Grade Really Means for Body Jewelry
From Poli International, body art material science and safety. poliinternational.com