Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

96432 Stress Corrosion Cracking of Nickel-Molybdenum Alloys

Picture for 96432 Stress Corrosion Cracking of Nickel-
Available for download
Product Number: 51300-96432-SG
ISBN: 96432 1996 CP
Author: Michael M. James, Dwayne L. Klarstrom, Brian J. Saldanha
$0.00
$20.00
$20.00
Intergranular stress corrosion cracking (SCC) of alloy B-2 (UNS N1 0665) can occur in dilute acids at low temperatures if there is short range ordering and NiMo in its metallurgical structure. Certain chemistries of alloy B-2 are particularly susceptible to the rapid kinetics of the Ni4Mo transformation which can occur within minutes of exposure to temperatures of 650-750°C such as during welding. The severity of ordering is dependent on alloy chemistry and thermomechanical processing conditions, and can result in reduced ductility at 700°C, and subsequently to SCC. SCC in the heat-aRected zones of welds of fabricated equipment of alloy B-2 have been found to be associated with the presence of Ni4Mo and a short-range ordered structure. Laboratory tests confirmed that only a partially-ordered structure is needed for alloy B-2 to be highly susceptible to SCC in dilute sulfhric acid. A strong correlation was found between degree of ordering, and both susceptibility to SCC and reduced ductility at 700°C. Development of alloy B-3 (UNS N10675) overcomes this thermal instability of alloy B-2, and provides enhanced resistance to SCC in the as-welded condition. In addition to TEM evidence and ductility measurements at 700°C, a stress-corrosion cracking test in boiling 5 wt.% sulfhric acid has also been found useful in evaluating the susceptibility of Ni-Mo alloys to ordering, and to Ni4Mo formation. Keywords: Aging, ordering, short-range order, Ni4Mo, nickel-molydenum, stress corrosion cracking, ductility, thermomechanical cracking, annealing, alloy B-2, alloy B-3, UNS N10665, UNS N10675, sulfiric acid.
Intergranular stress corrosion cracking (SCC) of alloy B-2 (UNS N1 0665) can occur in dilute acids at low temperatures if there is short range ordering and NiMo in its metallurgical structure. Certain chemistries of alloy B-2 are particularly susceptible to the rapid kinetics of the Ni4Mo transformation which can occur within minutes of exposure to temperatures of 650-750°C such as during welding. The severity of ordering is dependent on alloy chemistry and thermomechanical processing conditions, and can result in reduced ductility at 700°C, and subsequently to SCC. SCC in the heat-aRected zones of welds of fabricated equipment of alloy B-2 have been found to be associated with the presence of Ni4Mo and a short-range ordered structure. Laboratory tests confirmed that only a partially-ordered structure is needed for alloy B-2 to be highly susceptible to SCC in dilute sulfhric acid. A strong correlation was found between degree of ordering, and both susceptibility to SCC and reduced ductility at 700°C. Development of alloy B-3 (UNS N10675) overcomes this thermal instability of alloy B-2, and provides enhanced resistance to SCC in the as-welded condition. In addition to TEM evidence and ductility measurements at 700°C, a stress-corrosion cracking test in boiling 5 wt.% sulfhric acid has also been found useful in evaluating the susceptibility of Ni-Mo alloys to ordering, and to Ni4Mo formation. Keywords: Aging, ordering, short-range order, Ni4Mo, nickel-molydenum, stress corrosion cracking, ductility, thermomechanical cracking, annealing, alloy B-2, alloy B-3, UNS N10665, UNS N10675, sulfiric acid.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 02425 STRESS CORROSION CRACKING OF...
Available for download

02425 STRESS CORROSION CRACKING OF NICKEL-CHROMIUM-MOLYBDENUM ALLOYS IN CHLORIDE SOLUTIONS

Product Number: 51300-02425-SG
ISBN: 02425 2002 CP
Author: D.S. Dunn, Y.-M. Pan and G.A. Cragnolino
$20.00
Picture for 07421 Fabricating Nickel Alloy Products to Avoid Stress Relaxation Cracking
Available for download

07421 Fabricating Nickel Alloy Products to Avoid Stress Relaxation Cracking

Product Number: 51300-07421-SG
ISBN: 07421 2007 CP
Author: Lewis E. Shoemaker, Gaylord D. Smith, Brian A. Baker, and Jon Poole
Publication Date: 2007
$20.00

Various alloys subjected various heat treatments were examined in-service and tested to determine their susceptibility to stress relaxation cracking.
Picture for Material selection and recent case histories with nickel alloys
Available for download

51318-11600-Material selection and recent case histories with nickel alloys

Product Number: 51318-11600-SG
Author: Helena Alves
Publication Date: 2018
$20.00

The aim of this paper is to review the main aspects of the material selection for the chemical process industry (CPI) and present different examples to illustrate the material selection process.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support