6AL4V ELI F-136
The standard set by ASTM International for implant-grade titanium. The term 6AL4V ELI F-136 refers to the compisition of titanium-6 ALuminum-4 ELI (Extra Low Interstitial) and F-136 refers to the actual ASTM identifier.
ASTM F136, "Standard Specification for Wrought Titanium-6 Aluminum-4 Vanadium ELI (Extra Low Interstitial) Alloy for Surgical Implant Applications (UNS R56401)," ASTM International. For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at firstname.lastname@example.org. For Annual Book of ASTM Standards volume information, refer to the standard's Document Summary page on the ASTM website.