Metallurgy
Stainless steel grades
Grade selection determines corrosion resistance, hardness, and instrument longevity.
| Grade | Composition | Hardness | Best for |
|---|---|---|---|
| AISI 304 | 18% Cr, 8% Ni | Non-hardening | Retractors, bowls |
| AISI 410 | 12% Cr | HRC 35–45 | Scissors, clamps |
| AISI 420 | 13% Cr, high C | HRC 50–60 | Cutting instruments |
| AISI 316L | 16% Cr, 10% Ni, 2% Mo | Non-hardening | Implant-adjacent instruments |