Debasis To answer a general question like this would be difficult. Susceptibility to Chloride / or H2S for any material depends on stress (cold work or residual stress), temperature, concetnation, other contaminants, time of exposure, agitation etc. I suggest that if you need any specific information, you have to specify clealy your question on SCC susceptibility of SS 304 or SS 316 in H2S and with temperature and the stress conditions (Cold work or Residual Stress), possibly some information could be given. To my remembrance, from published papers on H2S Corrosion in Oil Wells for different materials in the 1980 NACE conference - experiments with materials - laboratory evaluation in simulated conditoins with CO2/H2S, 410, 316 and duplex S.S had failed in cold wroked conditon even at R.T. At elevated temp 177 o C susceptibility to SCC increased further for 316 - depending on the cold work. Trust this answers your question C.V.Srinivasan Nishi Engineers Pvt Ltd India Jan 29,2006 E-mail:nishi@vsnl.com >SS 304, SS 316 is very much suceptible to Chloride induced >IGSCC. How are the performances and damage susceptibility >w.r.t. H2S environment? >regards