Stress corrosion cracking tests have been performed on type 304H (UNS S30409) stainless steel with various degrees of sensitization in 0.002 M Na2S2O3. The electrochemical noise produced during slow-strain rate testing has been monitored. The noise signals have been interpreted manually, and it has been found that there are clear differences between material that fails by intergranular SCC, and material that suffers ductile failure. Additional information on the initiation and coalescence of cracks was obtained by single or multiple interruptions of the tensile straining.