Stress corrosion crack growth rate data have been obtained on as-received, cold worked and aged Alloy 22 (UNS N06022) in 110C, aerated, concentrated, high pH groundwater environments. The long term crack growth rate behavior under very stable conditions was monitored using reversing dc potential drop. Alloy 22 exhibited stable growth rates under "gentle" cyclic loading, but was prone to crack arrest at fully static loading. Reference to related data on Ti Gr.7 is also made.
Keywords: Stress corrosion cracking, Alloy 22, crack growth rate, concentrated groundwater, nuclear waste.