Structural Integrity of a Standpipe Component in a Petrochemical Catalytic Cracking Unit: Part 2—Assessment of Embrittlement Effects

[+] Author and Article Information
Levi de O. Bueno, Luiz Marino

Department of Materials Engineering, Universidade Federal Sao Carlos, Rodovia W. Luiz, km.235, 13565-905 Sao Carlos (SP), Brazil

Flavio A. S. Serra, Fernando T. Gazini

PETROBRAS/REPLAN, Rodovia SP 332, km 132, 13.100 Paulinia (SP), Brazil

J. Eng. Mater. Technol 122(3), 269-272 (Mar 07, 2000) (4 pages) doi:10.1115/1.482812 History: Received October 15, 1999; Revised March 07, 2000
Copyright © 2000 by ASME
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Notched bar creep test specimens
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Typical optical microstructures of: (a) the virgin material, 400×; (b) the ex-service material close to the regenerator’s gases exposed surface, 1000×; (c) the heat treated material, 400×. Etching: potassium bissulfite.
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Impact energy versus temperature for 2 1/4 Cr-1 Mo steel in the virgin, ex-service and heat-treated conditions
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Final elongation×rupture time: (a) for the ex-service material at 600, 625 and 650°C; (b) for the various materials at 600°C; (c) and at 650°C. S=ex-service, V=virgin, R=heat-treated, W=welded.
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Stress×rupture time data for smooth bar (dotted lines) and notched bar (solid lines) creep specimens: (a) virgin material; (b) ex-service material; (c) heat-treated material; (d) all data together
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Creep rupture data of notched bar compared to smooth bar specimens for 2 1/4 Cr-1Mo steel: (a) simulated HAZ material (peak temperature: 1350°C) tested at 550°C, according to Murakami, Nomura, and Watanabe 6; (b) simulated HAZ material (peak temperature: 1300°C/1 min/O.Q. and 715°C/15 min/A.C.) and base metal, tested at 600 and 650°C, according to Nishimura and Massuyama 7.
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LOG(stress)×Larson Miller parameter for the notched bar specimens compared to the smooth bar specimens data: (a) virgin material; (b) ex-service material; (c) heat-treated material; (d) all notched bar specimen data together
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Creep rupture strength for the 2 1/4 Cr-1 Mo steel of this research for the various conditions of the material as smooth bar and notched specimens




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