Mechanical and corrosion properties of super duplex stainless steel weldments

Martti Vilpas, Jouko Ruusila, Veli Kujanpää, Risto Karppi

Research output: Book/ReportReport

Abstract

The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages98
ISBN (Print)951-38-4453-6
Publication statusPublished - 1993
MoE publication typeNot Eligible

Publication series

SeriesVTT Tiedotteita - Meddelanden - Research Notes
Number1519
ISSN1235-0605

Fingerprint

Welds
Stainless steel
Corrosion
Toughness
Metallography
Weldability
Mechanical testing
Pitting
Nitrides
Austenite
Ferrite
Corrosion resistance
Hot Temperature
Metals

Keywords

  • duplex steels
  • dual phase steels
  • weldments
  • welded joints
  • stainless steels
  • weldability
  • mechanical properties
  • corrosion tests
  • corrosion resistance
  • evaluation
  • pitting
  • metallography
  • toughness
  • stress corrosion

Cite this

Vilpas, M., Ruusila, J., Kujanpää, V., & Karppi, R. (1993). Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1519
Vilpas, Martti ; Ruusila, Jouko ; Kujanpää, Veli ; Karppi, Risto. / Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo : VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).
@book{8872611eaddf4e208e79acebea035737,
title = "Mechanical and corrosion properties of super duplex stainless steel weldments",
abstract = "The report deals with the weldability of cast and rolled super duplex stainless steels (27 {\%} Cr, 7 8 {\%} Ni, 3 4 {\%} Mo, 0.2 2.7 {\%} Cu and 0,2 0,3 {\%} N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.",
keywords = "duplex steels, dual phase steels, weldments, welded joints, stainless steels, weldability, mechanical properties, corrosion tests, corrosion resistance, evaluation, pitting, metallography, toughness, stress corrosion",
author = "Martti Vilpas and Jouko Ruusila and Veli Kujanp{\"a}{\"a} and Risto Karppi",
year = "1993",
language = "English",
isbn = "951-38-4453-6",
series = "VTT Tiedotteita - Meddelanden - Research Notes",
publisher = "VTT Technical Research Centre of Finland",
number = "1519",
address = "Finland",

}

Vilpas, M, Ruusila, J, Kujanpää, V & Karppi, R 1993, Mechanical and corrosion properties of super duplex stainless steel weldments. VTT Tiedotteita - Meddelanden - Research Notes, no. 1519, VTT Technical Research Centre of Finland, Espoo.

Mechanical and corrosion properties of super duplex stainless steel weldments. / Vilpas, Martti; Ruusila, Jouko; Kujanpää, Veli; Karppi, Risto.

Espoo : VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).

Research output: Book/ReportReport

TY - BOOK

T1 - Mechanical and corrosion properties of super duplex stainless steel weldments

AU - Vilpas, Martti

AU - Ruusila, Jouko

AU - Kujanpää, Veli

AU - Karppi, Risto

PY - 1993

Y1 - 1993

N2 - The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.

AB - The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.

KW - duplex steels

KW - dual phase steels

KW - weldments

KW - welded joints

KW - stainless steels

KW - weldability

KW - mechanical properties

KW - corrosion tests

KW - corrosion resistance

KW - evaluation

KW - pitting

KW - metallography

KW - toughness

KW - stress corrosion

M3 - Report

SN - 951-38-4453-6

T3 - VTT Tiedotteita - Meddelanden - Research Notes

BT - Mechanical and corrosion properties of super duplex stainless steel weldments

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Vilpas M, Ruusila J, Kujanpää V, Karppi R. Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo: VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).