15 Chrome, or Super 15 Chrome, is a quenched and tempered martensitic-ferritic stainless steel intended for corrosion resistance in sweet (CO2) environments with moderate chloride content, requiring high strength up to 400°F. 15 Chrome offers improved mechanical properties and increased resistance to the effects of CO2 , chlorides, pH, and temperatures when compared with standard 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.
15 Chrome may be considered as a cost-effective alternative to duplex stainless steels such as 22 Chrome for higher pressure and temperature HPHT conditions. However, all environmental factors, including H2S, CO2 , temperature, pH, and chloride concentration, should be considered before final material selection.
Super 15 Chrome, grade 125, is not recommended for sour service.
14 - 16
6 - 7
1.8 - 2.5
Made by electric furnace (EF) or basic oxygen furnace (BOF)
Manufactured by traditional hot tube manufacturing processes
Quenched and tempered
Specified Mechanical Properties
Yield Strength ksi
Tensile Strength ksi
NACE MR0175/ISO 15156 H2S Sour Service Limits
Function of specimen size & strength
Not recommended for sour service
*Non-standard mechanical properties and grades are made available upon agreement.