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Wednesday, May 6, 2020 | History

3 edition of Stress-corrosion cracking susceptibility of weldments in duplex stainless steels found in the catalog.

Stress-corrosion cracking susceptibility of weldments in duplex stainless steels

Fred F. Lyle

Stress-corrosion cracking susceptibility of weldments in duplex stainless steels

by Fred F. Lyle

  • 286 Want to read
  • 33 Currently reading

Published by Materials Technology Institute of the Chemical Process Industries in St. Louis, Missouri .
Written in English

    Subjects:
  • Steel, Stainless -- Corrosion.,
  • Steel, Stainless -- Welding -- Testing.,
  • Welded joints -- Testing.

  • Edition Notes

    Includes bibliographical references.

    Statementby Fred F. Lyle, Jr.
    SeriesMTI publication -- no. 33
    Classifications
    LC ClassificationsTA479.S7 L95 1989
    The Physical Object
    Pagination96 p. in various pagings :
    Number of Pages96
    ID Numbers
    Open LibraryOL19636663M
    ISBN 100915567393
    OCLC/WorldCa21281617

    Stress Corrosion Cracking (SCC) is a common issue with many specialty alloys. SCC is often associated with chlorides, but can also occur with caustics and other corrosive media. The most common type of stress corrosion cracking in stainless steels occurs in chloride environments, which will be the focus of this discussion. The environmental factors that increase the cracking susceptibility include higher temperatures, increased chloride content, lower pH, and higher levels of tensile stress. Temperature is an important variable. When stainless steels are fully immersed, it is rare to see chloride stress corrosion cracking at temperatures below 60 °C ( °F).

    abstractNote = {Stress corrosion cracking (SCC) of chloride exposed stainless steels under evaporative conditions has for long been recognized as a factor that needed special attention. In this investigation the SCC resistance of welded and rolled UNS S, UNS S and UNS S has been studied. Chapter 7 Stress Corrosion Cracking of Austenitic Stainless Steel Weldments. Chapter 8 Applications of Fracture Mechanics in Stress Corrosion Cracking and Introduction to Life Prediction Approaches. Corrosion of Austenitic Stainless Steels: Mechanism, Mitigation and Monitoring.

    chloride and caustic stress corrosion cracking than austenitic grades. Ferritic stainless steels are subject to ˚C embrittlement when exposed in the –˚C range for a prolonged period – this must be considered when welding these grades. A low carbon, weldable, 12% chromium ferritic stainless steel. Duplex Stainless Stl Weld Hot Cracking Crack Susceptibility Zone Solidification Element Segregation Varestraint Testing Alloy UNS-S Alloy UNS-S Fe-Cr-Ni Alloys Microprobe Analysis tance to pitting, crevice corrosion, and stress-corrosion cracking (Refs. .


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Stress-corrosion cracking susceptibility of weldments in duplex stainless steels by Fred F. Lyle Download PDF EPUB FB2

Chloride stress corrosion cracking (CLSCC) is one the most common reasons why austenitic stainless steel pipework and vessels deteriorate in the chemical processing and petrochemical industries. Deterioration by CLSCC can lead to failures that have the potential to release stored energy and/or hazardous substances.

weldments in austenitic stainless steels. Despite the wide application of duplex stainless steel weld metals in environments conducive to stress-corrosion cracking, relatively few stud­ ies have been performed to determine the stress-corrosion cracking charac­ teristics of duplex weldments.

Investi­ gations by Fontana et a/.1 in the early. The stress corrosion cracking (SCC) behavior of duplex stainless steel (DSS) in 26 wt% NaCl solution at 90°C was investigated. Slow strain rate testing was performed at a strain rate of Page 11 - The Effect of Ferrite Content on Stress Corrosion Cracking in Duplex Stainless Steel Weld Metals at Room Temperature, Corrosion, Vol 35 (No.

‎ Appears in 13 books Reviews: 1. Duplex stainless steels (DSS) as alternatives to conventional austenitic stainless steels for the construction of pipelines is becoming more wide-spread, particularly for sour service applications where corrosion resistance / stress corrosion cracking resistance is required in File Size: 1MB.

microstructural and corrosion behavior. Hydrogen-induced cracking of steel weld-ments, sensitization and subsequent intergranular corrosion of stainless steel weld-ments, sulfide stress cracking of pipeline steel weldments, microbiologically induced corrosion of weldments, and stress-corrosion cracking of weldments are addressed in detail.

The most damaging forms of stress corrosion cracking in austenitic stainless steels are chloride and caustic stress corrosion cracking and cracking in high temperature, high pressure aqueous by: 9.

However, today the movement towards the use of duplex stainless steels, of austenitic-ferritic structure, in replacement to austenitic stainless steels, is increasing considerably.1 This is attributed to the fact that the duplex stainless steels have much higher stress corrosion cracking (SCC) resistance than austenitic stainless Size: 1MB.

Both sensitization and grain boundary segregation made stainless steels susceptible to intergranular stress corrosion cracking. A transition in SCC mode from transgranular to intergranular was observed in both and stainless steels, when tested in magnesium chloride solution boiling at °C.

The welding of austenitic stainless steel has two major problems, namely hot cracking of weld metal and sensitisation of the HAZ.

Hot cracking is due to the inability of the solidifying weld metal to bear the strains, arising during solidification in a certain temperature range. This is normally encountered in a fully austenitic weld deposit. Two very successful conferences - in Glasgow and Beaune - were held on duplex stainless steels during the first half of the '90s.

This book takes keynote papers from each, and develops and. The older types of austenitic-ferritic duplex steels containing –% carbon were also unsatisfactory in terms of todays demands on the toughness and corrosion resistance of weldments, mainly because of their high susceptibility to intergranular corrosion (IC).

Introduction. Although austenitic stainless steels possess excellent resistance to general corrosion, they are susceptible to the localized corrosive attacks, such as pitting corrosion, intergranular corrosion and stress corrosion cracking (SCC), in chloride-containing environments.Welding often makes this situation worse, owing to the metallurgical changes and residual stresses.

tibility for stress-corrosion cracking in the heat- affected zone of the high-strength steel. A 40% thermal expansion mismatch between the auste- nitic stainless steel and ferritic base metal pro- duces a significant residual stress field in the weldment; this residual stress field also contrib- utes to cracking susceptibility.

A similar, but. Stress Corrosion Cracking is a cost effective solution for many applications where series stainless steels are susceptible to chloride stress corrosion cracking (SCC). SCC will occur when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides.

The micrograph below (X) illustrates SCC in a stainless steel chemical processing piping system. Chloride stress corrosion cracking in austenitic stainless steel is characterized by the multi-branched "lightning bolt" transgranular crack pattern.

SCC in a stainless steel chemical processing piping system; photo courtesy. 7-Mo Stainless ASTM attack austenite austenite phase austenite-ferrite austenitic stainless steels behavior boiling carbides carbon Charpy chloride solution CM CM cooling rate corrosion rate corrosion resistance corrosion tests crack propagation crevice corrosion curve ductility duplex alloys duplex stainless steels duplex steels duplex.

The corrosion testing confirmed the excellent corrosion resistance of both type L austenitic stainless steel and types, and duplex stainless steel in black liquors of 15% to 49%. Autogenous welded specimens of austenitic (S and S), duplex (S) and super duplex (S) stainless steels were fabricated by laser penetration welding (LPW) with a.

() Stress Corrosion Cracking at the Weldments of Austenitic Stainless Steels in High Temperature Deionized Water. Tetsu-to-HaganeOnline publication date: 1-Jan. 2 Stress-Corrosion Cracking Table 1 Alloy/Environment Systems Exhibiting SCC Alloy Carbon steel High-strength steels Austenitic stainless steels.

High-nickel alloys a-brass Aluminum alloys Titanium alloys Magnesium alloys Zirconium alloys Environment .The influence of the weld metal chemistry on the stress corrosion cracking (SCC) susceptibility of dissimilar weldments between S austenitic stainless steel and duplex steels was.both fully austenitic and duplex weld metals.

*^ Effects of P, S, Si, Nb, C and N on Hot Cracking Susceptibility of Fully Austenitic Alloys Phosphorus and sulfur both have great influence on hot-cracking susceptibility. Figure 2 shows the effect of phosphorus. Hot-cracking susceptibility increases markedly as the phosphorus content exceeds %.