Table 6 Confidence intervals for each stress level used for both base metal and surfaced samples
Material conditions | Stress levels (MPa) | Upper confidence level | Lower confidence level |
|---|---|---|---|
Base metal | 489.45 | 130,357 | 3463 |
414.15 | 167,055 | 127,344 | |
Surfaced samples | 489.45 | 84,759 | 47,120 |
414.15 | 248,743 | 120,616 |