Creep Crack Growth in a High Strength Low Alloy Steel at 360 °C

Low temperature creep crack growth in low alloy reactor pressure vessel steel

“…Since the absolute slope of creep rupture curves typically increases with increasing test time, the lifetime can be expected to be somewhat overestimated. The predicted lifetime represents a component with a small (mm-sized) crack [20]. Assuming a design lifetime of 100 000 h, the reference stress causing failure due to CCG in the coarse grained HAZ is 507 MPa at 320°C, 362 MPa at 340°C, 285 MPa at 360°C, and 78 MPa at 420°C, respectively.…”