Elevated temperature material properties of stainless steel alloys
By L. Gardner, A. Insausti, K. T. Ng, M. Ashraf. 2010
281 citations recorded by the source corpus.
Appropriate assessment of the fire resistance of structures depends largely on the ability to accurately predict the material response at elevated temperature. The material characteristics of stainless steel differ from those of carbon steel due to the high alloy content. These differences have been explored in some detail at room temperature, whilst those at elevated temperature have been less closely scrutinised. This paper presents an overview and reappraisal of previous pertinent research, together with an evaluation of existing elevated temperature stainless steel stress-strain test data and previously proposed material models. On the basis of examination of all available test data, much of which have been recently generated, revised strength and stiffness reduction factors at elevated temperatures for a range of grades of stainless steel have been proposed, including four grades not previously covered by existing structural fire design guidance. A total of eight sets of strength reduction factors are currently provided for different grades of stainless steel in EN 1993-1-2 and the Euro Inox/SCl Design Manual for Structural Stainless Steel, compared to a single set for carbon steel. A number of sets of reduction factors is appropriate for stainless steel since the elevated temperature properties can vary markedly between different grades, but this has to be justified with sufficient test data and balanced against ease of design - it has been proposed herein that the eight sets of reduction factors be rationalised on the basis of grouping grades that exhibit similar elevated temperature properties. In addition to more accurate prediction of discrete features of the elevated temperature material stress-strain response of stainless steel (i.e. strength and stiffness reduction factors), a material model for the continuous prediction of the stress-strain response by means of a modified compound Ramberg-Osgood formulation has also been proposed. The proposed model is less complex than the current provisions of EN 1993-1-2, more accurate when compared to test results, and the model parameters have a clear physical significance. © 2010 Elsevier Ltd. All rights reserved.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/c18ef5405e79721ce597607101ec704bbd2c443d
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Citations in the corpus
- Cross-section stability of lean duplex stainless steel welded I-sections (2013, background): “Despite the low nickel content, it possesses higher strength than austenitic stainless steel, along with good corrosion resistance and high temperature properties, and adequate weldability and fracture toughness [2-4].”
- Stability and design of stainless steel structures – Review and outlook (2019, methodology): “5 The two-stage Ramberg-Osgood expression has also been applied to the modelling of stainless steel material behaviour at elevated temperature [16], where the second strain hardening exponent m (denoted m at elevated temperature) can be defined explicitly with reference to the strength at 2% strain”
- Intrinsic strain aging, Σ3 boundaries, and origins of cellular substructure in additively manufactured 316L (2018, background): “It is critical to note that at elevated temperatures, the yield stress of the material is dramatically lower than at room temperature [23], thus providing significantly lower resistance to dislocation motion.”
- Description of stress-strain curves for stainless steel alloys (2015, background): “[10] for application to stainless steel material modelling in fire.”