From: A review of crack growth models for near-neutral pH stress corrosion cracking on oil and gas pipelines
Test period
σhmax/σy
R
t1, t2 (min)
Duration
(days)
I
0.55
0.57
10, 30
60
II
0.67
0.53
55
III
0.80
30
IV
0.77
20, 5
V
5, 20
105