... of long-lasting high temperature of 1200 oc, the nozzle of boiler, highly featuring oxide resistance, wears less.2 ... powder and mixed-up hot-blasting steam flow, the nozzle of boiler wears less.3. High quality of ... long use. 4. Cold & heat fatigue resistanceThough the nozzle of boiler is subjected to sudden heat at the ... any product weakness such as crack and deformation. rear-earth double-phase steel