CrMo – T23

Welding Consumables for P92 and T23 Creep Resisting Steels

There is continuing effort to increase the energy conversion efficiency of fossil-fired power
plants, for which enhanced creep resisting steels are essential to withstand more advanced steam
conditions. Two new steels are P92, a modification of the now very well established P91, and
T23. Effective exploitation of these steels is dependent upon the ability to fabricate a range of
components and systems for the different types of fossil fuelled power plants. In turn, fabrication
depends upon the availability of suitable welding consumables for the main arc welding
processes commonly used for both new fabrications and upgrade/repair. In practice, this means
that consumables for shielded metal arc welding (SMAW), flux cored arc welding (FCAW), gas
tungsten arc welding (GTAW), and submerged arc welding (SAW), all need to be available, tried
and tested. This paper examines recent developments and progress in consumable design for
both P92 and T23 steels, as reflected in all-weld metal properties.