Skip to Main Content
ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
Search for other works by this author on:
ASM International
ISBN electronic:
Publication date:
Book Chapter

Stress-Corrosion Cracking of C-Mn Steel in a CO2 Absorber in a Chemical Plant

Sushil K. Chauhan
Sushil K. Chauhan
Welding Engineering and Metallurgy Department, Larsen and Toubro Ltd.
Search for other works by this author on:
Page range:
191 - 193


The source of cracking in the circumferential weld seam in a JIS-SM50B carbon-manganese steel pipe used in a CO2 absorber was investigated, the absorber had been in service for 18 years. The seam had been weld-repaired twice, and the repair welds had been locally stress relieved. Longitudinal seams in the same vessel, which had been stress relieved in a furnace, showed no tendency toward cracking. The solution passing through the vessel contained CO2-CO-H20, KHCO, and Cl− ions. Nondestructive testing revealed that the cracks originated in the heat-affected zone and propagated into the base metal and weld. Severe branching of the cracks characteristic of stress-corrosion cracking was observed. Microexamination revealed that crack propagation was transgranular further supporting the possibility of stress-corrosion cracking. Simulation tests carried out in the vessel confirmed this mode of cracking. It was recommended that weld seams be furnace heat treated at a temperature of 600 to 640 deg C (1110 to 1180 deg F) for a minimum of 1 h per inch of section thickness.

You do not currently have access to this content.
Don't already have an account? Register

Sushil K. Chauhan, 1992. "Stress-Corrosion Cracking of C-Mn Steel in a CO2 Absorber in a Chemical Plant", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

Download citation file:

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal