Supermartensitic stainless steels, recently made available as oil country tubular goods (OCTG), have been developed as a valuable cost effective alternative to duplex stainless steel for high CO2, medim high chlorides, and very low H2S environments. Experimental tests were carried out to determine the localised corrosion and the sulphide stress cracking (SSC) resistance of supermartensitic steel UNS S41425 to be used as OCTG in slightly sour oil and gas wells and to compare its performance with standard L80 API grade UNS S42000 13% Cr steel, considered as a reference. Supermsrtensitic steels with yield range as per L80, C95, P110, API5CT, were developed and corrosion and mechanical properties were determined. The influence of different chloride contents...
Kevwords: Martensitic stainless steel, corrosion resistant alloys, oil country tubular goods, sour environment, stress corrosion cracking, sulphlde stress cracking, hydrogen sulphide, carbon dioxide, slow strain rate test