| Sample | Ratio | Cr/Fe | Ni/Fe | Mn/Fe |
| SSPN | Surface | 0.310 | - | - |
|
| Bulk | 0.250 | - | - |
| SSDN | Surface | 0.237 | - | 0.126 |
|
| Bulk | 0.191 | - | 0.143 |
| SSOP | Surface | 3.726 | 0.107 | - |
|
| Bulk | 0.250 | 0.128 | - |