Independent laboratories conducted extensive testing on UNS S32003 molybdenumcontaining
lean duplex stainless steel. This study was undertaken as an effort to expand the
knowledge of this lean duplex alloy based on factual information, to aid end users faced with
material decisions to combat deep water pressure, late-life souring and downstream
processing. The results of these tests suggest the bounds of environmental limits for this alloy
in sour service. These limits are considered in view of limits for 316L stainless steel and 2205
duplex stainless steel currently listed under MR0175 / ISO 15156 Materials for Use in H2Scontaining
environments in oil and gas production.1 Some field simulation testing and
application experiences are also discussed.
KEY WORDS: Duplex Stainless Steel, Lean Duplex Stainless Steel, UNS S32003, Sour Service Limits,
MR0175/ISO15156, H2S Containing Environments, Flexible Flowlines, Stress Corrosion
Cracking, SCC, Sulfide Stress Cracking, SSC, Late-Life Oil Reservoir Souring