For Grade 92 steel (9Cr-0.5Mo-1.8W-V-Nb), multi-batch stress-rupture measurements are shown to be rationalized through relationships which involve only the activation energy for matrix diffusion (300 kJmol−1) and the ultimate tensile stress values at the creep temperatures. The resulting ‘master curve’ is at least as impressive as those obtained using traditional parametric methods, but with the empirical parameters replaced by physically-meaningful properties. These approaches lead to straightforward procedures for extended extrapolation of short-term data, with analyses of test results for creep lives less than 5000 hours predicting 100,000-hour rupture strengths. Indeed, noting that the allowable creep strengths for Gr. 92 steel have been reduced progressively as longer-term fracture data have become available, the present predictions coincide well with the lower limits of the most recent estimates determined for stress-temperature combinations producing failure in times up to 100,000 hours and more. Validation of the new methodologies can be achieved by independent analyses of standard property sets for other creep-resistant steels, introducing the prospect of a marked reduction in the scale and costs of the experimental programs currently undertaken to provide long-term engineering design data.
Skip Nav Destination
ASME 2007 Pressure Vessels and Piping Conference
July 22–26, 2007
San Antonio, Texas, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4287-8
PROCEEDINGS PAPER
Design Data Prediction for Grade 92 Steel Available to Purchase
Brian Wilshire,
Brian Wilshire
University of Wales Swansea, Swansea, UK
Search for other works by this author on:
Penelope J. Scharning
Penelope J. Scharning
University of Wales Swansea, Swansea, UK
Search for other works by this author on:
Brian Wilshire
University of Wales Swansea, Swansea, UK
Penelope J. Scharning
University of Wales Swansea, Swansea, UK
Paper No:
CREEP2007-26754, pp. 623-630; 8 pages
Published Online:
August 20, 2009
Citation
Wilshire, B, & Scharning, PJ. "Design Data Prediction for Grade 92 Steel." Proceedings of the ASME 2007 Pressure Vessels and Piping Conference. Volume 9: Eighth International Conference on Creep and Fatigue at Elevated Temperatures. San Antonio, Texas, USA. July 22–26, 2007. pp. 623-630. ASME. https://doi.org/10.1115/CREEP2007-26754
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Critical Review and Appraisal of Traditional and New Procedures for the Quantification of Creep Fracture Behavior Using 1Cr–1Mo–0.25V Steel
J. Eng. Mater. Technol (April,2009)
Mechanical and Microstructural Performance Evaluation of Diffusion Bonded Alloy 800H for Very High Temperature Nuclear Service
J. Eng. Mater. Technol (April,2022)
A Phenomenological Model for Intergranular Failure by r-type and Wedge-Type Cavitation
J. Eng. Mater. Technol (July,1995)
Related Chapters
Introduction and Definitions
Handbook on Stiffness & Damping in Mechanical Design
A 3D Cohesive Modelling Approach for Hydrogen Embrittlement in Welded Joints of X70 Pipeline Steel
International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
Basic Concepts
Design & Analysis of ASME Boiler and Pressure Vessel Components in the Creep Range