1. Summary of modified 9Cr-1Mo steel development program, 1975–1986;DiStefano,1986
2. In-service behaviour of creep strength enhanced ferritic steels Grade 91 and Grade 92-Part 2 weld issues;Parker;Int J Press Vessels Piping,2013
3. Aluminium nitride precipitation in low strength Grade 91 power plant steels;Brett,2004
4. In-service type IV cracking on a modified 9Cr (Grade 91) header;Brett,2005
5. The type IV creep strength of Grade 91 materials;Brett,2007