Development of high Mn-N duplex stainless steel for automobile structural components

Ihsan ul Haq Toor; Park Jung Hyun; Hyuk Sang Kwon

doi:10.1016/j.corsci.2007.07.004

Development of high Mn-N duplex stainless steel for automobile structural components

Ihsan ul Haq Toor, Park Jung Hyun, Hyuk Sang Kwon^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

106 Scopus citations

Abstract

A new high Mn-Ni free (duplex stainless steel) DSS containing 18Cr-6Mn-1Mo-0.2N has been developed by examining the effects of manganese on the corrosion and mechanical properties of high Mn SSs containing 18Cr-4 ∼ 11Mn-0 ∼ 2Ni-0 ∼ 1Mo-0.2N. The alloy with 45% ferrite is found to be an optimum alloy with much higher mechanical strength and similar corrosion resistance compared with those of standard SS304. In addition, the alloy was free of precipitation of sigma phase and Cr-nitride when exposed to high temperatures due primarily to relatively low contents of Cr, N and Mo. With an increase in Mn content, the resistance to pitting and metastable pitting corrosion of high Mn DSS decreased since the number of (Mn, Cr) oxides, acting as preferential sites of pitting, increased with the Mn content.

Original language	English
Pages (from-to)	404-410
Number of pages	7
Journal	Corrosion Science
Volume	50
Issue number	2
DOIs	https://doi.org/10.1016/j.corsci.2007.07.004
State	Published - Feb 2008
Externally published	Yes

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support from NGV. This work was also partially supported by Brain Korea 21 Project.

Keywords

A. Duplex stainless steel
A. Manganese
B. ENA
B. Thermocalc
C. Pitting corrosion

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2007.07.004

Cite this

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title = "Development of high Mn-N duplex stainless steel for automobile structural components",

abstract = "A new high Mn-Ni free (duplex stainless steel) DSS containing 18Cr-6Mn-1Mo-0.2N has been developed by examining the effects of manganese on the corrosion and mechanical properties of high Mn SSs containing 18Cr-4 ∼ 11Mn-0 ∼ 2Ni-0 ∼ 1Mo-0.2N. The alloy with 45% ferrite is found to be an optimum alloy with much higher mechanical strength and similar corrosion resistance compared with those of standard SS304. In addition, the alloy was free of precipitation of sigma phase and Cr-nitride when exposed to high temperatures due primarily to relatively low contents of Cr, N and Mo. With an increase in Mn content, the resistance to pitting and metastable pitting corrosion of high Mn DSS decreased since the number of (Mn, Cr) oxides, acting as preferential sites of pitting, increased with the Mn content.",

keywords = "A. Duplex stainless steel, A. Manganese, B. ENA, B. Thermocalc, C. Pitting corrosion",

author = "Toor, {Ihsan ul Haq} and Hyun, {Park Jung} and Kwon, {Hyuk Sang}",

note = "Funding Information: The authors gratefully acknowledge the financial support from NGV. This work was also partially supported by Brain Korea 21 Project.",

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doi = "10.1016/j.corsci.2007.07.004",

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volume = "50",

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journal = "Corrosion Science",

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T1 - Development of high Mn-N duplex stainless steel for automobile structural components

AU - Toor, Ihsan ul Haq

AU - Hyun, Park Jung

AU - Kwon, Hyuk Sang

N1 - Funding Information: The authors gratefully acknowledge the financial support from NGV. This work was also partially supported by Brain Korea 21 Project.

PY - 2008/2

Y1 - 2008/2

N2 - A new high Mn-Ni free (duplex stainless steel) DSS containing 18Cr-6Mn-1Mo-0.2N has been developed by examining the effects of manganese on the corrosion and mechanical properties of high Mn SSs containing 18Cr-4 ∼ 11Mn-0 ∼ 2Ni-0 ∼ 1Mo-0.2N. The alloy with 45% ferrite is found to be an optimum alloy with much higher mechanical strength and similar corrosion resistance compared with those of standard SS304. In addition, the alloy was free of precipitation of sigma phase and Cr-nitride when exposed to high temperatures due primarily to relatively low contents of Cr, N and Mo. With an increase in Mn content, the resistance to pitting and metastable pitting corrosion of high Mn DSS decreased since the number of (Mn, Cr) oxides, acting as preferential sites of pitting, increased with the Mn content.

AB - A new high Mn-Ni free (duplex stainless steel) DSS containing 18Cr-6Mn-1Mo-0.2N has been developed by examining the effects of manganese on the corrosion and mechanical properties of high Mn SSs containing 18Cr-4 ∼ 11Mn-0 ∼ 2Ni-0 ∼ 1Mo-0.2N. The alloy with 45% ferrite is found to be an optimum alloy with much higher mechanical strength and similar corrosion resistance compared with those of standard SS304. In addition, the alloy was free of precipitation of sigma phase and Cr-nitride when exposed to high temperatures due primarily to relatively low contents of Cr, N and Mo. With an increase in Mn content, the resistance to pitting and metastable pitting corrosion of high Mn DSS decreased since the number of (Mn, Cr) oxides, acting as preferential sites of pitting, increased with the Mn content.

KW - A. Duplex stainless steel

KW - A. Manganese

KW - B. ENA

KW - B. Thermocalc

KW - C. Pitting corrosion

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JO - Corrosion Science

JF - Corrosion Science

IS - 2

ER -

Development of high Mn-N duplex stainless steel for automobile structural components

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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