COMMON TRADE NAMES: 22 Chrome Duplex, SM22CR®, 2205, Duplex 2205, SAF® 2205, Sanmac® 2205, VM® 22, F51
22 Chrome (UNS S31803), also referred to as 2205 Duplex or 22Cr, is a cold hardened duplex stainless steel intended for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments with moderate chloride content, requiring high strength up to 400°F.
22Cr offers improved mechanical properties and increased resistance to the effects of CO2 , chlorides, pH, and temperatures when compared with Super 13 Chrome. The higher strength and temperature resistance, relative to Super 13 Chrome, allow it to be used in deeper wells with high-pressure and high-temperature (HPHT) conditions, as downhole tubular components, packers, and other subsurface equipment. All environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
This alloy is classified in MR0175/ISO15156 as a duplex stainless steel having a Pitting Resistance Equivalent Number (PREN) ≤40 and is suitable for H2S partial pressure ≤0.3 psi.
|≤ 0.03||21 - 23||4.5 - 6.5||BAL||≤ 2||≤ 1||2.5 - 3.5||≤ 0.03||≤ 0.02||0.08 - 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 2 Category 22-5-3
|NACE MR0175/ISO 15156
H2S Sour Service Limits
|H2S ≤ 3.0 psi,
Temp ≤ 450°F
|H2S ≤ 3.0 psi|
|140||140||160||145||9||38||140 Grade not recommended for sour service|
|Thermal Expansion||X10-6 / °F||7||7.5||8|
|Elastic Modulus||psi x 106||29||28.2||27|
|Thermal Conductivity||Btu/ft h °F||8||9||10|
|Specific Heat||Btu/lb °F||0.12||0.12||0.12|
MIN OD: 2-1/16″ (2.0625″)
MAX OD: 10-3/4″ (10.750”)
MAX WALL THICKNESS: 1.925”
LENGTHS: R1, R2, R3
END FINISH: Plain end, Premium threads, & API threads
Standard & Non-Standard Sizes Available.
Manufactured Material Available as Quickly as 1 Week.
Non-Standard Mill Quantities Accommodated