Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470

Martti Vilpas, Kim Wallin, Hannele Tihekari, Risto Karppi

Research output: Book/ReportReport

Abstract

The report is given of test results on mechanical properties of shielded metal arc and submerged arc welded joints of quenched and tempered steel StE 470. The tests comprise conventional hardness, tensile and Charpy-V testing, as well as fracture mechanics testing. The test results of the welded joints show satisfactory strength, toughness and transition behaviour as compared with the corresponding properties of the base material. The arc energy in the range of 17 kJ/cm to 50 kJ/cm has no marked effect on the mechanical properties of the joints. The Charpy-V-transition temperatures lie in the Orange of -40 °C to -60 °C for the weld metals and -30 °C to -45 °C for the fusion boundaries with all the three arc energies 17, 30 and 50 kJ/cm used. Correspondingly, the Kj-transition behaviour of the joints was found to be almost independent of the arc energy. The SMA-welds showed, however, brittle pop-in behaviour at all K rest temperatures, i.e. -80 °C to +20 °C. The reason suggested for this is the heterogeneity of the SMA-weld metals arising from the weawing technique used in the SMAW-tests.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages25
ISBN (Print)951-38-2179-X
Publication statusPublished - 1984
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number319
ISSN0358-5077

Fingerprint

Welds
Mechanical properties
Steel
Metals
Testing
Fracture mechanics
Superconducting transition temperature
Toughness
Fusion reactions
Hardness
Temperature

Keywords

  • high strength steels
  • toughness
  • ductility
  • welded joints
  • strength

Cite this

Vilpas, M., Wallin, K., Tihekari, H., & Karppi, R. (1984). Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 319
Vilpas, Martti ; Wallin, Kim ; Tihekari, Hannele ; Karppi, Risto. / Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470. Espoo : VTT Technical Research Centre of Finland, 1984. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 319).
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Vilpas, M, Wallin, K, Tihekari, H & Karppi, R 1984, Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 319, VTT Technical Research Centre of Finland, Espoo.

Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470. / Vilpas, Martti; Wallin, Kim; Tihekari, Hannele; Karppi, Risto.

Espoo : VTT Technical Research Centre of Finland, 1984. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 319).

Research output: Book/ReportReport

TY - BOOK

T1 - Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470

AU - Vilpas, Martti

AU - Wallin, Kim

AU - Tihekari, Hannele

AU - Karppi, Risto

PY - 1984

Y1 - 1984

N2 - The report is given of test results on mechanical properties of shielded metal arc and submerged arc welded joints of quenched and tempered steel StE 470. The tests comprise conventional hardness, tensile and Charpy-V testing, as well as fracture mechanics testing. The test results of the welded joints show satisfactory strength, toughness and transition behaviour as compared with the corresponding properties of the base material. The arc energy in the range of 17 kJ/cm to 50 kJ/cm has no marked effect on the mechanical properties of the joints. The Charpy-V-transition temperatures lie in the Orange of -40 °C to -60 °C for the weld metals and -30 °C to -45 °C for the fusion boundaries with all the three arc energies 17, 30 and 50 kJ/cm used. Correspondingly, the Kj-transition behaviour of the joints was found to be almost independent of the arc energy. The SMA-welds showed, however, brittle pop-in behaviour at all K rest temperatures, i.e. -80 °C to +20 °C. The reason suggested for this is the heterogeneity of the SMA-weld metals arising from the weawing technique used in the SMAW-tests.

AB - The report is given of test results on mechanical properties of shielded metal arc and submerged arc welded joints of quenched and tempered steel StE 470. The tests comprise conventional hardness, tensile and Charpy-V testing, as well as fracture mechanics testing. The test results of the welded joints show satisfactory strength, toughness and transition behaviour as compared with the corresponding properties of the base material. The arc energy in the range of 17 kJ/cm to 50 kJ/cm has no marked effect on the mechanical properties of the joints. The Charpy-V-transition temperatures lie in the Orange of -40 °C to -60 °C for the weld metals and -30 °C to -45 °C for the fusion boundaries with all the three arc energies 17, 30 and 50 kJ/cm used. Correspondingly, the Kj-transition behaviour of the joints was found to be almost independent of the arc energy. The SMA-welds showed, however, brittle pop-in behaviour at all K rest temperatures, i.e. -80 °C to +20 °C. The reason suggested for this is the heterogeneity of the SMA-weld metals arising from the weawing technique used in the SMAW-tests.

KW - high strength steels

KW - toughness

KW - ductility

KW - welded joints

KW - strength

M3 - Report

SN - 951-38-2179-X

T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

BT - Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Vilpas M, Wallin K, Tihekari H, Karppi R. Mechanical properties of SMA- and SA-welded joints for quenched and tempered steel STE 470. Espoo: VTT Technical Research Centre of Finland, 1984. 25 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 319).