High-Temperature & Creep-Resistant Steel
High-temperature steels are engineered to retain strength and resist creep, oxidation and microstructural degradation during long exposure at elevated temperature.
Engineering basis
Cr-Mo and Cr-Mo-V steels are widely used; advanced power grades use higher chromium and carefully controlled alloying for creep strength.
Standards, grades or methods
ASTM/ASME P11/P22/P91/P92 piping families, A387 plate families and corresponding fittings/forgings; stainless 304H/321H/347H and heat-resistant grades are used at higher oxidation-demand temperatures.
Typical applications
Boilers, steam lines, refinery heaters, reactors, headers, power plants and high-temperature process piping.
Critical checks
Creep rupture strength, allowable stress, oxidation, tempering response, PWHT, type-IV HAZ damage and long-term metallurgical stability are critical.
Good engineering practice
Use the current governing code or specification and verify manufacturer data, material traceability and project-specific requirements. Where safety, pressure containment or structural integrity is involved, obtain approval from the responsible engineer before changing material, process or acceptance criteria.
Element Folio engineering reference. Requirements vary by standard, project and jurisdiction.
