| Element | D9 Tube | SS316 L (N) |
| C | 0.04 | 0.03 |
| Ni | 15.5 | 14 |
| Cr | 14.04 | 18 |
| Mo | 2.25 | - |
| Ti | 0.26 | - |
| Si | 0.61 | 0.33 |
| Mn | 1.78 | 1.88 |
| N | 0.0037 | 0.044 |
| Fe | Balance | Balance |