This paper will present the results of a severe sour gas test program on HASTELLOY® C-22HS® alloy (N07022) a new high strength corrosion-resistant alloy for oil and gas applications. This alloy is capable of yield strengths from 160 to 200 ksi through either cold working or cold work + age-hardening. This high strength is achieved while leaving the material with excellent ductility and toughness – far surpassing alloys strengthened through traditional precipitation hardening. Despite these excellent mechanical properties the alloy exhibits exceptional sour gas resistance. In this paper we will present the results of sour gas testing (both SSRT and 90-day C-ring tests) at temperatures ranging from 400 to 550°F. Tests were conducted both with and without the presence of elemental sulfur. In addition the mechanical properties of the alloy will be presented including tensile and toughness properties of both as-produced and long-term thermally exposed material.