COMMON TRADE NAMES: 13 Chrome, API L80 13CR, API 5CT 13Cr, 13Cr L80, L80-13Cr, 420, 420 Mod, 13%Cr
13 Chrome L80, UNS S42000, is a quenched and tempered martensitic stainless steel used for corrosion resistance in sweet (CO2) and mildly sour (H2S) environments up to 300°F. Commonly used as downhole tubular components, packers, and other subsurface equipment, it is included in API 5CT as Group 2, Grade L80, Type 13Cr. Its controlled yield strength and hardness comply with NACE MR0175.
This grade is best suited for mildly corrosive conditions as pH, chlorides, temperature, and H2S may limit its use. NACE MR0175/ISO15156 Table A.19 provides a recommended limit of 1.5 psi partial pressure H2S with pH ≥3.5.
|0.15 - 0.22||12 - 14||≤ 0.5||BAL||0.25 - 1||≤ 1||≤ 0.25||≤ 0.02||≤ 0.01|
|Steel Making||Made by electric furnace (EF) or basic oxygen furnace (BOF)|
|Pipe Making||Manufactured by traditional hot tube manufacturing processes|
|Heat Treatment||Quenched and tempered|
API 5CT Group 2 Grade L80 Type 13Cr
|NACE MR0175/ISO 15156
H2S Sour Service Limits
|80||80||95||95||Function of specimen size||23||Table A.19||H2S ≤ 1.5 psi,
pH ≥ 3.5
|Elastic Modulus||psi x 106||29.6||29.3|
|Yield Strength De-Rating||%||100||91|