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Properties of heavy components of steel grade 91 and their welds
Nuclear Engineering and Design, 1993Abstract The use of the modified 9% Cr1% Mo steel grade (grade 91) for the manufacturing of heavy products (forgings, plates) for pressure vessels is evaluated on the following aspects: (i) possibility to produce heavy components (base material) with the required properties, (ii) conditions for welding without cracking, and (iii) availability of ...
P. Bocquet, Ph. Bourges, A. Cheviet
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Key Life Management Issues with Grade 91 Steel
Advances in Materials Technology for Power Plants, 2010Abstract Recent evidence suggests that using hardness as the sole acceptance criterion for Grade 91 steels is inadequate for predicting service performance. Components can achieve acceptable initial hardness values through heat treatment despite suboptimal elemental composition, leading to poor tempering resistance and unexpectedly low ...
Jonathan Parker, Kent Coleman
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Formation and characterization of aluminide coating over Grade 91 steel
Materials Today: Proceedings, 2016Abstract Alumina forming aluminide coatings have excellent properties with respect to liquid metal corrosion, tritium permeation barrier and high temperature oxidation/corrosion resistance. Aluminide coatings were developed over modified Grade 91 steel by pack cementation process at different temperatures using different pack compositions. The coated
Bhaskar Paul +3 more
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Experimental evaluation of localized creep deformation in grade 91 steel weldments
Materials Science and Engineering: A, 2021Abstract Spatially resolved measurement of localized creep deformation in heterogeneous creep resistant steel weldments is crucial but challenging for lifetime assessments of critical steam components in power plants. In this work, experimental approaches were established to quantitatively evaluate commonly observed localized creep deformation in ...
Yiyu Wang +5 more
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An enhancement in mechanical properties of grade 91 steel on microalloying with boron and nitrogen
Materials at High Temperatures, 2020Effects of microalloying the grade 91 steel with boron along with control on nitrogen content (P91BN) on its microstructure, tensile and creep properties have been investigated and compared with th...
Sakthivel Thaviduchetty +3 more
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Time to Initiation of Tertiary Creep Property of Grade 91 Steels
Volume 6B: Materials and Fabrication, 2016Creep deformation property of Grade 91 steels was analyzed on more than 370 creep curves over a wide range of time to rupture from about 10 hours to beyond 100,000 hours, in order to evaluate time to 1% total strain, time to minimum creep rate and time to initiation of tertiary creep.
Kazuhiro Kimura, Kota Sawada
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UK experience with modified 9%Cr (grade 91) steel
Energy Materials, 2007AbstractFollowing its introduction in the late 1980s, modified 9%Cr (grade 91) steel has found widespread use for retrofit and new build applications in the UK power industry. Although it has only been in service for a relatively short period of time, currently ∼80 000 h, a number of problems have arisen.
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New ECCC assessment of creep rupture strength for steel grade X10CrMoVNb9-1 (Grade 91)
International Journal of Pressure Vessels and Piping, 2010Abstract A first assessment of creep rupture strength for steel grade X10CrMoVNb9-1 (Grade 91) was performed by ECCC in 1995. The results were included in the European standard EN 10216. Due to a significant increase of test data and test duration it was decided in 2005 to make a re-assessment of the extended database.
W. Bendick +3 more
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Effect of Cr segregation on creep strength in grade 91 steels
Materials at High Temperatures, 2022Kota Sawada, Kazuhiro Kimura
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Experimental study on impact resistance of steel-fiber-reinforced two-grade aggregate concrete
Construction and Building Materials, 2023Juhong Han
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