UNS N06975/ Alloy G2

　　Designed for demanding conditions requiring both high strength and strong corrosion resistance, UNS N06975 is a cold‑hardened nickel‑based material intended for highly sour (H₂S) environments with elevated chloride levels, and it can maintain its performance at temperatures up to 400°F.

　　Thanks to its elevated nickel and molybdenum content, UNS N06975 not only extends the sour service limits of nickel alloys but also offers excellent resistance to chlorides and dissolved oxygen. As a result, it is widely used for downhole tubular components, packers, and other subsurface equipment in HPHT severely sour wells, saltwater injection wells, and acid gas injection (AGI) wells. However, all environmental factors — such as H₂S, CO₂, temperature, pH, and chloride concentration — must be carefully evaluated before final material selection.

　　For sour service applications, UNS N06975 is classified as a Type 4d alloy under MR0175/ISO15156. It has no restrictions on H₂S partial pressure when the temperature is below 300°F, and it can resist 300 psi of H₂S partial pressure at 425°F.