AMPP Store - Products tagged with 'stress relaxation cracking'

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08454 Stress Relaxation Cracking Of Welded Joints In Thick Sections Of Type-347 Stabilized Grade Of Stainless Steel

Product Number: 51300-08454-SG

ISBN: 08454 2008 CP

Author: Christian E. van der Westhuizen

Publication Date: 2008

$20.00

This paper discusses reactors in hydrocarbon service that experienced numerous cracking problems over a 8-year period, where cracks were confined to the welded zones. The material is TP347 stainless steel, welded with E347-16 consumables.

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51318-11086-Failure of RFCC Catalyst Cooler Aeration Piping System (Cat Cooler Internals)

Product Number: 51318-11086-SG

Author: Ntsikelelo Ngonyoza / Abdulaziz Al Hamdi / Aliaa Al Balushi / Robin Blakey

Publication Date: 2018

$20.00

Degradation mechanisms experienced by a refinery’s RFCC catalyst cooler aeration piping system. Analysis of the most recent and a past failure determined the metallurgical and mechanical degradation mechanism(s) that led to these failures.

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Failure Analysis of a 4-Inch 25Cr-35Ni Welded Fitting

Product Number: 51323-19079-SG

Author: Sudhakar Mahajanam, Chris Miller, Scott Harding

Publication Date: 2023

$20.00

Up until the 1940s, typical furnace tube materials consisted of wrought chromium steels and austenitic stainless steels. But the low carbon content led to increased creep.

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Field Metallography and Replication on Liquefied Natural Gas Assets: Non-Destructive Metallurgical Testing to complement other regular Non-Destructive Tests

Product Number: 51320-15140-SG

Author: Anil Kumar Chikkam, Mehrooz Zamanzadeh, Sunil Kumar Pulagam, Ganesh P, Dhandabani, Bangaru Murali, Jeevanandam Shanmugam

Publication Date: 2020

$20.00

During plant shutdown maintenance, some components cannot be removed out of service immediately for metallurgical examination due to high cost involved and loss of production hours. The best alternative is to replicate the lab based metallography work under the field conditions. Field Metallography and Replication (FMR) also known as in-situ metallography is a powerful non-destructive test (NDT) tool used to examine the microstructure of the component when it is still in service. Moreover, FMR is also used to study the microstructural alterations for the fitness for service assessment.

This paper provides case studies of materials in Natural Gas Processing facility where FMR was used as an NDT tool without sectioning the component. This paper discusses the damage mechanisms such as sigma phase embrittlement, stress relaxation cracking and creep.

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Stress Relaxation Cracking Of Thin Alloy 800/800H Electric Heater Tubular Heating Elements

Product Number: 51322-17921-SG

Author: Iyad Al-Buraiki, Mohammed Abu Alsaud, Sadiq Al-Ismail

Publication Date: 2022

$20.00

Stress relaxation cracking (SRC) is a failure mechanism known to occur in austenitic stainless steels and nickel alloys operating at moderate to high temperatures.

Typically, SRC failures tend to occur under the following conditions: ^1-6 1. Susceptible material: 800H, 347H, 617, etc. (typically materials with low creep ductility) 2. High residual stresses: Hardness > 200 HV (welded thick section) 3. Specific temperature range: usually between 500 °C (932 °F) and 750 °C (1382 °F).

Under these conditions, component stresses are relieved by time dependent inelastic deformation.3 In susceptible materials, this process occurs by intergranular cracking and is essentially a creep mechanism.^2-6 In this respect, materials with low creep ductility tend to be prone to this type of damage mechanism. On the other hand, materials that have good creep ductility can tolerate the inelastic strains due to relaxation without cracking.³

Products tagged with 'stress relaxation cracking'

08454 Stress Relaxation Cracking Of Welded Joints In Thick Sections Of Type-347 Stabilized Grade Of Stainless Steel

51318-11086-Failure of RFCC Catalyst Cooler Aeration Piping System (Cat Cooler Internals)

Failure Analysis of a 4-Inch 25Cr-35Ni Welded Fitting

Field Metallography and Replication on Liquefied Natural Gas Assets: Non-Destructive Metallurgical Testing to complement other regular Non-Destructive Tests

Stress Relaxation Cracking Of Thin Alloy 800/800H Electric Heater Tubular Heating Elements

Association for Materials Protection and Performance