Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel

Stefan Holmström, Pertti Auerkari

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Preferred models for creep rupture strength prediction have been evaluated for the parent and cross-weld steel E911, intended for use in headers and steam lines of power plants up to about 600°C. The assessment of the rupture data was performed in accordance with the Guidelines of the ECCC (European Creep Collaborative Committee), using the procedure and models of the standard PD6605. Rupture strength was predicted to a maximum extrapolation time of 160 000 h for the parent material and 50 000 h for the welds. The estimated stress reduction factor (SRF) for welded E911 at 600ºC was about 80% for a rupture life of 21 000 h, and about 70% for a rupture life of 50 000 h. However, the predicted decrease in SRF for longer time and higher temperatures may be exaggerated due to limited long-term cross-weld data.
Original languageEnglish
Title of host publicationBALTICA V
Subtitle of host publicationCondition and Life Management for Power Plants
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages621-634
Volume2
ISBN (Electronic)951-38-5717-4
ISBN (Print)951-38-5716-6
Publication statusPublished - 2001
MoE publication typeA4 Article in a conference publication
EventBALTICA V - Condition and Life Management for Power Plants - Porvoo, Finland
Duration: 6 Jun 20018 Jun 2001

Publication series

NameVTT Symposium
PublisherVTT
Number212
ISSN (Print)0357-9387
ISSN (Electronic)1455-0873

Conference

ConferenceBALTICA V - Condition and Life Management for Power Plants
Abbreviated titleBaltica V
CountryFinland
CityPorvoo
Period6/06/018/06/01

Fingerprint

creep
rupture
steel
modeling
parent material
power plant
prediction

Cite this

Holmström, S., & Auerkari, P. (2001). Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel. In BALTICA V: Condition and Life Management for Power Plants (Vol. 2, pp. 621-634). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 212
Holmström, Stefan ; Auerkari, Pertti. / Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel. BALTICA V: Condition and Life Management for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2001. pp. 621-634 (VTT Symposium; No. 212).
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title = "Modeling of creep rupture strength and stress reduction factors for welded 9{\%} Cr steel",
abstract = "Preferred models for creep rupture strength prediction have been evaluated for the parent and cross-weld steel E911, intended for use in headers and steam lines of power plants up to about 600°C. The assessment of the rupture data was performed in accordance with the Guidelines of the ECCC (European Creep Collaborative Committee), using the procedure and models of the standard PD6605. Rupture strength was predicted to a maximum extrapolation time of 160 000 h for the parent material and 50 000 h for the welds. The estimated stress reduction factor (SRF) for welded E911 at 600ºC was about 80{\%} for a rupture life of 21 000 h, and about 70{\%} for a rupture life of 50 000 h. However, the predicted decrease in SRF for longer time and higher temperatures may be exaggerated due to limited long-term cross-weld data.",
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Holmström, S & Auerkari, P 2001, Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel. in BALTICA V: Condition and Life Management for Power Plants. vol. 2, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 212, pp. 621-634, BALTICA V - Condition and Life Management for Power Plants, Porvoo, Finland, 6/06/01.

Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel. / Holmström, Stefan; Auerkari, Pertti.

BALTICA V: Condition and Life Management for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2001. p. 621-634 (VTT Symposium; No. 212).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AU - Holmström, Stefan

AU - Auerkari, Pertti

PY - 2001

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N2 - Preferred models for creep rupture strength prediction have been evaluated for the parent and cross-weld steel E911, intended for use in headers and steam lines of power plants up to about 600°C. The assessment of the rupture data was performed in accordance with the Guidelines of the ECCC (European Creep Collaborative Committee), using the procedure and models of the standard PD6605. Rupture strength was predicted to a maximum extrapolation time of 160 000 h for the parent material and 50 000 h for the welds. The estimated stress reduction factor (SRF) for welded E911 at 600ºC was about 80% for a rupture life of 21 000 h, and about 70% for a rupture life of 50 000 h. However, the predicted decrease in SRF for longer time and higher temperatures may be exaggerated due to limited long-term cross-weld data.

AB - Preferred models for creep rupture strength prediction have been evaluated for the parent and cross-weld steel E911, intended for use in headers and steam lines of power plants up to about 600°C. The assessment of the rupture data was performed in accordance with the Guidelines of the ECCC (European Creep Collaborative Committee), using the procedure and models of the standard PD6605. Rupture strength was predicted to a maximum extrapolation time of 160 000 h for the parent material and 50 000 h for the welds. The estimated stress reduction factor (SRF) for welded E911 at 600ºC was about 80% for a rupture life of 21 000 h, and about 70% for a rupture life of 50 000 h. However, the predicted decrease in SRF for longer time and higher temperatures may be exaggerated due to limited long-term cross-weld data.

M3 - Conference article in proceedings

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VL - 2

T3 - VTT Symposium

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PB - VTT Technical Research Centre of Finland

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Holmström S, Auerkari P. Modeling of creep rupture strength and stress reduction factors for welded 9% Cr steel. In BALTICA V: Condition and Life Management for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2001. p. 621-634. (VTT Symposium; No. 212).