NACE MR0175 / ISO 15156 SOUR SERVICE LIMITS FOR NICKEL BASE ALLOYS Partial Pressure H2S (psi) vs. Temperature (F) Temperature (F) No Limit 1100 1000 900 800 700 600 500 400 300 200 100 0 www.cralloys.com E-mail us at [email protected] or call us at (713) 827-8600 Types 4c, d, e 50 0 100 150 200 250 300 350 400 450 500 Partial Pressure H2S (psi) Types 4d, e Types 4e