Technology of heat treatment of Cl.56 steel pipe joints made by the flash-butt welding - S. I. Kuchuk-Jatsenko; Ju. V. Shvets; V. F. Zagadarchuk; V. I. Shvets; V. I. Khomenko; S. I. Zhuravlev; Ja. Sudarkin (Automatic Welding, 2013)