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Properties and microstructure of modified 9 % Cr steels

Published online by Cambridge University Press:  25 October 2002

A. Di Gianfrancesco ,
S. Matera  and
O. Tassa
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Abstract

The E911 steel grade has been developed from grade P91 to increase the creep properties at 600 oC through the control of vanadium, nitrogen and the addition of tungsten. Grade 911 shows a better creep performance than grade 91. Microstructure stability of both steels was investigated by isothermal ageing tests for up to 10,000 hours at 600 and 650 oC and their mechanical behaviour is compared. Results on welded joints have also been compared with base material.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 98 , Issue 1 , January 2001 , pp. 117 - 123
Copyright
© La Revue de Métallurgie, 2001

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