Negligible creep temperature curves for EN-13445

In this paper a novel but simplified methodology for determining negligible creep temperature (TNEC) curves from standard creep strength tables and tensile properties is presented. The methodology is not material specific and has been applied for 15 non-alloyed and alloyed ferritic/martensitic steels from EN-10028-2 and 9 creep resisting austenitic steels from EN-10028-7. The curves are now assessed for inclusion in the revision of the European standard EN-13445. In this paper the workflow, methodology and key assumptions for the definition of the TNEC curves are described. Verification calculations for time to 0.2% creep strain are given for the steels P22, P91 and 316L/316L(N). The benefits and limitations of the methodology are also discussed.JRC.G.I.4-Nuclear Reactor Safety and Emergency Preparednes