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07424 Precipitation and Its Effect on the Design of Cast Heat Resistant Alloys

Picture for 07424 Precipitation and Its Effect on the Design of Cast Heat Resistant Alloys
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Product Number: 51300-07424-SG
ISBN: 07424 2007 CP
Author: D-Voke, R-Pankiw, N-Evans, K-Liu, M-Santella, V-Sikka, G-Muralidharan, P-Maziasz, & C-Stevens
Publication Date: 2007
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Heat resistant cast alloy (H-Series) steels such as HP modified and micro-alloyed HP, are used extensively in the petrochemical industry for reformer furnace tubing and ethylene pyrolisis coils. The HP alloys have a microstructure consisting of an austenitic matrix with finely dispersed carbides. The H-Series steels have evolved over many years of alloy development by trial-and-error additions of alloying elements. It is possible to further improve the performance of these steels through the use of computational thermodynamics based on a detailed understanding of the composition-microstructure-property relationships. This paper highlights some of the progress made in understanding the relationship between precipitation and creep properties of these alloys through using a combination of thermodynamic modeling, microstructural characterization, and mechanical property measurements. It also provides information on the creep properties of a new alloy designed based upon the improved understanding of the structure-processing-property relationship in these alloys.
Heat resistant cast alloy (H-Series) steels such as HP modified and micro-alloyed HP, are used extensively in the petrochemical industry for reformer furnace tubing and ethylene pyrolisis coils. The HP alloys have a microstructure consisting of an austenitic matrix with finely dispersed carbides. The H-Series steels have evolved over many years of alloy development by trial-and-error additions of alloying elements. It is possible to further improve the performance of these steels through the use of computational thermodynamics based on a detailed understanding of the composition-microstructure-property relationships. This paper highlights some of the progress made in understanding the relationship between precipitation and creep properties of these alloys through using a combination of thermodynamic modeling, microstructural characterization, and mechanical property measurements. It also provides information on the creep properties of a new alloy designed based upon the improved understanding of the structure-processing-property relationship in these alloys.
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Review on the Heat-Resistant Stainless Steel Alloys Used for the Steam Methane Reformer Outlet Systems

Product Number: 51317--9351-SG
ISBN: 9351 2017 CP
Author: Shankar Venkataraman
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Both cast (UNS N08151) and wrought (UNS N08810/N08811) metallurgies have been used for outlet components. The microstructural features responsible for material performance, the various microstructural alterations occurring in service are reviewed as are the impact on serviceability and on, repair weldability and examples of failures.

 
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