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Title: Undermatching electrode applied to HT80 heavy plates for penstock

Abstract

The results of weld cracking tests in high humidity atmosphere, which is often experienced in the field-welding of penstock, show that the preheating temperature required is lowered by using the undermatching AWS E 9016G type electrode instead of the overmatching AWS E 11016G type electrode. In welded-wide plate tension tests at a temperature which is a little lower than the minimum service temperature experienced in the penstock, an appreciable difference in joint strength and joint ductility between undermatched and overmatched weld connections was not observed. Based upon the test results, a moisture-resistant, extra-low hydrogen type undermatching electrode, with a nominal tensile strength of 65 kgf/mm/sup 2/ (92,482 psi), was developed to satisfy design conditions required for penstock circumferential weld joints. The new type of electrode is found to lower the required preheating temperature by required preheating temperature by several tens of degrees Centigrade compared with the commercial E 9016G type electrode selected because of its moisture-resistant and extra-low hydrogen nature.

Authors:
 [1]; ; ;
  1. (Osaka Univ., Japan)
Publication Date:
OSTI Identifier:
6362621
Alternate Identifier(s):
OSTI ID: 6362621
Resource Type:
Conference
Journal Name:
Weld. J. (Miami); (United States)
Additional Journal Information:
Journal Volume: 58:2; Conference: 59. Annual Meeting of the American welding Society, New Orleans, LA, USA, 3 Apr 1978
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; MANGANESE ALLOYS; CRACKS; NICKEL STEELS; WELDED JOINTS; PUMPED STORAGE POWER PLANTS; PENSTOCKS; STEELS; CHARPY TEST; DUCTILITY; ELECTRODES; FILLER METALS; FRACTURE PROPERTIES; MECHANICAL PROPERTIES; TEMPERATURE DEPENDENCE; WELDABILITY; WELDING; ALLOYS; FABRICATION; HYDROELECTRIC POWER PLANTS; IRON ALLOYS; IRON BASE ALLOYS; JOINING; JOINTS; NICKEL ALLOYS; PEAKING POWER PLANTS; PIPES; POWER PLANTS; TENSILE PROPERTIES 360101* -- Metals & Alloys-- Preparation & Fabrication; 250300 -- Energy Storage-- Pumped Hydro-- (-1989)

Citation Formats

Satoh, K., Toyoda, M., Ukita, K., and Matsuura, T. Undermatching electrode applied to HT80 heavy plates for penstock. United States: N. p., 1979. Web.
Satoh, K., Toyoda, M., Ukita, K., & Matsuura, T. Undermatching electrode applied to HT80 heavy plates for penstock. United States.
Satoh, K., Toyoda, M., Ukita, K., and Matsuura, T. Thu . "Undermatching electrode applied to HT80 heavy plates for penstock". United States.
@article{osti_6362621,
title = {Undermatching electrode applied to HT80 heavy plates for penstock},
author = {Satoh, K. and Toyoda, M. and Ukita, K. and Matsuura, T.},
abstractNote = {The results of weld cracking tests in high humidity atmosphere, which is often experienced in the field-welding of penstock, show that the preheating temperature required is lowered by using the undermatching AWS E 9016G type electrode instead of the overmatching AWS E 11016G type electrode. In welded-wide plate tension tests at a temperature which is a little lower than the minimum service temperature experienced in the penstock, an appreciable difference in joint strength and joint ductility between undermatched and overmatched weld connections was not observed. Based upon the test results, a moisture-resistant, extra-low hydrogen type undermatching electrode, with a nominal tensile strength of 65 kgf/mm/sup 2/ (92,482 psi), was developed to satisfy design conditions required for penstock circumferential weld joints. The new type of electrode is found to lower the required preheating temperature by required preheating temperature by several tens of degrees Centigrade compared with the commercial E 9016G type electrode selected because of its moisture-resistant and extra-low hydrogen nature.},
doi = {},
journal = {Weld. J. (Miami); (United States)},
number = ,
volume = 58:2,
place = {United States},
year = {1979},
month = {2}
}

Conference:
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