COMMON TRADE NAMES: 2242, Alloy 2242, SM2242®, Incoloy® 825, Inc825, Sanicro® 41
Alloy 825 (UNS N08825), also referred to as 2242, is a cold hardened nickel-based alloy, intended for corrosion resistance in highly sour (H2S) environments with moderate chloride content, requiring high strength up to 350°F.
825 offers increased resistance to the effects of H2S relative to stainless steels allowing its use as downhole tubular components, packers, and other subsurface equipment in sour wells with high-pressure and high-temperature (HPHT) conditions and Acid Gas Injection (AGI) wells. However, all environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
The alloy is classified in MR0175/ISO15156 as a type 4c alloy, with no restrictions to a partial pressure of H2S below 270°F and resistant to 200 psi H2S at 350°F.
|≤ 0.05||19.5 - 23.5||38 - 46||BAL||≤ 1||≤ 0.5||2.5 - 3.5||1.5 - 3||≤ 0.03||≤ 0.03||0.6 - 1.2||≤ 0.2|
|Steel Making||Made by electric furnace process or blast furnace followed by Vacuum Oxygen Decarburization (VOD) process or Argon Oxygen Decarburization (AOD) Process|
|Pipe Making||Manufactured by traditional tube manufacturing processes, High strength tubulars should be furnished in cold worked condition|
|Heat Treatment||Solution Annealing Process before final cold drawing|
API 5CRA / ISO 13680 Group 4 Category 21-42-3
|NACE MR0175/ISO 15156
H2S Sour Service Limits
|No limit ≤ 270°F,
Refer to table for temperatures up to 450°F
|140||140||160||145||9||38||140 Grade not recommended for sour service|
|Elastic Modulus||psi x 106||28.3||27.9||27.1|
|Thermal Conductivity||Btu/ft h °F||6.4||7.1||8.1|
|Specific Heat||Btu/lb °F||0.11||0.12||0.12|