The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H

Changes in mechanical properties of material as a result of service in different conditions can be provided by mechanical testing to assist the estimation of current internal situation of these materials, or the degree of deterioration may exist in furnaces serviced at high temperature and exceed t...

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Autores principales:	Ahmed Naif Al-Khazraji, Samir Ali Amin, Husam Ahmed Al-Warmizyari
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Keywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/ef66899c94f64415ac904f264d08569e
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spelling	oai:doaj.org-article:ef66899c94f64415ac904f264d08569e2021-12-02T03:53:49ZThe Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H10.22153/kej.2017.11.0051818-11712312-0789https://doaj.org/article/ef66899c94f64415ac904f264d08569e2017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/344https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Changes in mechanical properties of material as a result of service in different conditions can be provided by mechanical testing to assist the estimation of current internal situation of these materials, or the degree of deterioration may exist in furnaces serviced at high temperature and exceed their design life. Because of the rarity works on austenitic stainless steel material type AISI 321H, in this work, ultimate tensile strength, yield strength, elongation, hardness, and absorbed energy by impact are evaluated based on experimental data obtained from mechanical testing. Samples of tubes are extracted from furnace belong to hydrotreaterunit, also samples from un-used tube material are used to make comparisons between these properties. Tensile properties of stainless steel (AISI 321H) were decreased as temperature increases; the trend of properties decreasing for the samples of un-used tube material is the same for the ex-used material. The trend of stress-strain curve will not change due to elevated temperature exposure for long time of service, except the yield strength will be higher in this diagram. The yield strength increased under these conditions, but the ability of material which is elongated will decrease. Hardness and absorbed energy increased by 11.28 and 14% respectively when the material is aged for long time under effect of high temperature accompanied with creep effect. Keywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace. Ahmed Naif Al-KhazrajiSamir Ali AminHusam Ahmed Al-WarmizyariAl-Khwarizmi College of Engineering – University of BaghdadarticleKeywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace.Chemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 13, Iss 2 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Keywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Keywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ahmed Naif Al-Khazraji Samir Ali Amin Husam Ahmed Al-Warmizyari The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
description	Changes in mechanical properties of material as a result of service in different conditions can be provided by mechanical testing to assist the estimation of current internal situation of these materials, or the degree of deterioration may exist in furnaces serviced at high temperature and exceed their design life. Because of the rarity works on austenitic stainless steel material type AISI 321H, in this work, ultimate tensile strength, yield strength, elongation, hardness, and absorbed energy by impact are evaluated based on experimental data obtained from mechanical testing. Samples of tubes are extracted from furnace belong to hydrotreaterunit, also samples from un-used tube material are used to make comparisons between these properties. Tensile properties of stainless steel (AISI 321H) were decreased as temperature increases; the trend of properties decreasing for the samples of un-used tube material is the same for the ex-used material. The trend of stress-strain curve will not change due to elevated temperature exposure for long time of service, except the yield strength will be higher in this diagram. The yield strength increased under these conditions, but the ability of material which is elongated will decrease. Hardness and absorbed energy increased by 11.28 and 14% respectively when the material is aged for long time under effect of high temperature accompanied with creep effect. Keywords: Hardness, Impact, Mechanical Properties, Stainless Steel 321H, Mechanical Properties, Tensile Strength, Tube Furnace.
format	article
author	Ahmed Naif Al-Khazraji Samir Ali Amin Husam Ahmed Al-Warmizyari
author_facet	Ahmed Naif Al-Khazraji Samir Ali Amin Husam Ahmed Al-Warmizyari
author_sort	Ahmed Naif Al-Khazraji
title	The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
title_short	The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
title_full	The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
title_fullStr	The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
title_full_unstemmed	The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H
title_sort	effects of long-term operation and high temperature on material properties of austenitic stainless steel type 321h
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/ef66899c94f64415ac904f264d08569e
work_keys_str_mv	AT ahmednaifalkhazraji theeffectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h AT samiraliamin theeffectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h AT husamahmedalwarmizyari theeffectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h AT ahmednaifalkhazraji effectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h AT samiraliamin effectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h AT husamahmedalwarmizyari effectsoflongtermoperationandhightemperatureonmaterialpropertiesofausteniticstainlesssteeltype321h
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The Effects of Long-Term Operation and High Temperature on Material Properties of Austenitic Stainless Steel Type 321H

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