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Welding electrodes HR-21U

AWS A5.1: E7015
EN ISO 2560-A- E 42 4 B 2 2 H10
Terms of use
  • welding with electrodes is carried out on a direct current of reverse polarity in all spatial positions, except vertical from top to bottom
  • welding is performed on a short length of the arc or resting on the cleaned edges
Special properties
  • provide high resistance of the weld metal to the formation of pores and increase the length of the welding arc
  • surfacing coefficient: 0,17 …0,18 g/A•min
  • consumption of electrodes per 1 kg of deposited metal: 1,3…1,4 кг
Electrodes of the TMU-21U brand are designed for welding responsible metal structures and pipelines made of carbon and low-alloy steels of thermal and nuclear power plant equipment
Package Weight
First select diameter
Package Weight
First select diameter
Coating type
basic
CHEMICAL COMPOSITION OF DEPOSITED METAL, %
According to AWS A5.1 / Typical Results
C
Carbon
0.1
Mn
Manganese
0.8
Si
Silicon
0.3
WEDGE METAL MECHANICAL PROPERTIES
According to AWS A5.1 / Typical Results
  • Tensile strength, MPa 500...640
  • Yield point, MPa ≥ 420
  • Relative elongation, % ≥ 20
Baking before welding
  • permissible moisture content in the coating before use is not more than 0.4%
  • in case of electrode coating wetting above the norm - dry for 60 minutes at 400±10 °С
Welding modes
Welding current strength, A for electrodes with a diameter of, mm
3.04.0
80 – 110110 – 150

Welding should be carried out with direct current of reverse polarity, “+” on an electrode with an arc voltage of 20 - 25 V.

Position of seams during welding
pa
pb
pc
pf
pe
pd
Package Weight
First select diameter
Package Weight
First select diameter
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