- Tensile strength, MPa 500...640
- Yield strength, MPa ≥ 420
- Elongation, % ≥ 20
- Impact energy KV −40 °C, J ≥ 47
Welding electrodes HR-21U
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
Packaging data
| Diameter, mm | Length, mm | Number of electrodes in a pack, pcs. | Pack weight, kg |
|---|---|---|---|
| 3,0 | 350 | 92 – 96 | 2,5 |
| 4,0 | 450 | 82 – 86 | 5,0 |
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
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 | |
|---|---|
| 3.0 | 4.0 |
| 80 – 110 | 110 – 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
Download Certificates
Сертифікат відповідності
Declaration of perfomance
Система якості
