There are several proprietary Super 13 Chrome grades available in the market today. The most common are UNS S41425, S41426, & S41427. These grades are used in oilfield environments that contain CO2, and low concentrations of H2S.
UNS-41425 |
C | Mn | P | S | Si | Cr | Ni | Mo |
Minimum | 0.500 | 12.500 | 4.500 | 1.600 | ||||
Maximum | 0.030 | 1.000 | 0.020 | 0.005 | 0.500 | 14.000 | 6.000 | 2.000 |
UNS-41426 |
C | Mn | P | S | Si | Cr | Ni | Mo |
Minimum | 11.500 | 4.500 | 1.500 | |||||
Maximum | 0.030 | 0.500 | 0.020 | 0.005 | 0.500 | 13.500 | 6.000 | 2.500 |
UNS-41427 |
C | Mn | P | S | Si | Cr | Ni | Mo |
Minimum | 11.800 | 4.500 | 1.600 | |||||
Maximum | 0.030 | 1.000 | 0.020 | 0.005 | 0.500 | 13.500 | 6.000 | 2.500 |