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Metallurgical and stress state factors affecting creep and fracture behavior of 9% Cr steel

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Document pages: 15 pages

Abstract: EPRI supported studies have identified key material information affecting the properties of creep strength reinforced ferritic steels, especially grade 91 steels. EPRI recommends emphasizing the application of five point comprehensive strategy to effective life management of tempered martensitic steel manufacturing parts. This integration promotes the balanced use of resources, which can reduce the uncertainty of creep and fracture behavior when properly concentrated. The strict control of steelmaking, steel processing and heat treatment ensures that alloys with performance defects will never be put into use. A cornerstone of this forward-looking approach is the definition of "metallurgical risk ", which links the existence of inclusionons and trace elements to the susceptibility for creep damage. The improved confidence in the high temperature performance of CSEF steel components promotes reliability, increases efficiency, and minimizes the risk of component fracture.

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