F-22 Mod is a low alloy steel predominately used in wellhead applications as an upgrade over AISI 4130. It is a very deep hardening, heat treatable alloy steel that contains nominally .12% Carbon, with 2.25% Chromium and 1.0% Molybdenum as the primary hardening elements.
The popularity of this grade stems from its improved weldability over 4130 while maintaining good strength and excellent impact properties deeper into the product.
80,000 psi or 85,000 minimum yield - limited to a Rockwell C -22 maximum for compliance NACE MR-01-75/ISO 15156 (for use in hydrogen sulfide environments)
Annealed or As-rolled - no mechanical properties; suitable for further heat treatment