Low hydrogen type coated electrode

Details Low hydrogen type coated electrode Low hydrogen type coated electrode

B - Operations, Transporting

23

K

B23K 35/365 (2006.01) B23K 35/36 (2006.01)

Patent

CA 2047628

ABSTRACT: Disclosed herein is a low hydrogen type coated electrode comprising a steel core wire entirely coated with a coating agent, wherein the coating agent contains, by weight, 35-55% CaCO3, 1-4% SrCO3, 1.5-4% CaF2, 1-5% TiO2, 5-12% SiO2, 3-9% Si, 1-6% Mn and 15-40% Fe and fulfills the following relationships: CaCO3/CaF2 = from 9 to 25, and Fe/CaF2 = from 5 to 22. The low hydrogen type coated electrode produces excellent effects particularly when applied to downward welding for circumferential butt joints of pipes. - 19 -

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