... grain normalized steel grade in P355N, P355NH, P355NL1, P355NL2, P275NH, P460NH, P460NL1, P460NL2, P275NL1 and P275NL2 steel grade. Supply Steel ... Grade: P355N, P355NH, P355NL1, P355NL2, P275NH, P275NL1.P275NL2, P460NH, P460NL1, P460NL2, P275NL1 and P275NL2 steel ... relieved. P355N boiler plate Main application:Boiler steel plates are used to build boilers and pressure ...