Nickel content by weight, common body-jewellery materials

Implant-grade titanium and BioFlex® PP-R are effectively nickel-free; 316L surgical steel is a nickel-bearing alloy that relies on a passive layer to stay within release limits.

Nickel content by weight, common body-jewellery materialsImplant-grade titanium and BioFlex® PP-R are effectively nickel-free; 316L surgical steel is a nickel-bearing alloy that relies on a passive layer to stay within release limits.Implant-grade titanium (ASTM F136)≈0%BioFlex® PP-R polymer0%316L surgical steel10–15%

Source: ScienceInsights; Poli International — BioFlex® ↗

Chart by Poli International — Implant-Grade Material StatisticsFree to reuse with attribution · CC BY 4.0