718 is a Nickel based, super-alloy steel that is predominately used in wellhead and downhole applications suitable for corrosive environments.
C | Mn | P | S | Si | Cr | Ni | Mo | Nb/Ta | Ti | Al | Co | |
Minimum | 17.000 | 50.000 | 2.800 | 4.870 | 0.800 | 0.400 | ||||||
Maximum | 0.045 | 0.350 | 0.010 | 0.010 | 0.350 | 21.000 | 55.000 | 3.300 | 5.200 | 1.150 | 0.600 | 1.000 |
120,000 psi yield minimum - limited to a Rockwell C -40 maximum for compliance NACE MR-01-75/ISO 15156 (for use in hydrogen sulfide environments)