---
url: https://www.star-piercing.ch/eng/Titan-G23-vs-ASTM-F-136-what-is-the-difference
type: blog
published: 2026-02-26T15:15:24+01:00
categories: Wiki Piercing, Wiki Jewelry
---

# Titan G23 vs. ASTM F-136 – what is the difference?

> In most cases, there is no real difference in the material itself—only in the name...

![Titan G23 vs. ASTM F-136 – what is the difference?](https://www.star-piercing.ch/media/image/news/37/xl/wiki---titan-g23-vs_preview.png)

In short: There is usually no real difference in the material itself—only in the name.

**Titanium G23**

- Designation for the alloy Ti-6Al-4V ELI
- "ELI" = Extra Low Interstitials (particularly pure titanium)
- Highly biocompatible
- Frequently used for implants and high-quality piercing jewelry
- Nickel-free and corrosion-resistant

**ASTM F-136**

- ASTM F-136 is not an alloy, but a standard.
- This standard defines the exact requirements for medical implant titanium (chemical composition, purity, mechanical properties).
- The material is also Ti-6Al-4V ELI.

**The real difference**

- G23 describes the titanium alloy
- ASTM F-136 describes the quality and testing standard

**Conclusion**

In most cases, manufacturers mean practically the same material when they refer to "titanium G23" and "ASTM F-136." The difference is that ASTM F-136 additionally guarantees that the titanium is medically tested and complies with standards.

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