- Tensile strength, MPa ≥ 590
- Yield strength, MPa ≥ 435
- Elongation, % ≥ 15
- Impact energy KV +20 °C, J ≥ 24
Welding electrodes HR-3U
Terms of use
- designed for welding in all spatial positions in a circumvertical way from top to bottom
Special properties
- ensure high resistance of the weld metal to the formation of pores, lengthened arcs
- allow welding with an inclination of the edges of the base metal at least 15º
- welding is performed with a short arc, the edges are cleaned before welding< /li>
- surfacing coefficient: 0.16...0.18 g/A•min
- consumption of electrodes per 1 kg of deposited metal: 1.4...1.5 kg
HR-3U electrodes are designed for manual arc welding by direct current of reverse polarity in all spatial positions, except for the vertical method from top to bottom, equipment and pipelines made of steel grades 12МХ, 15ХМ, 20ХМЛ, 12Х2М1, 12X1MF, 12X2MFB, 12X2MFSR, 20XMFL, 15X1M1F and 15X1M1FL, which work at temperatures up to 570 °C.
Packaging data
| Diameter, mm | Length, mm | Number of electrodes in a pack, pcs. | Pack weight, kg |
|---|---|---|---|
| 3,0 | 350 | 91 – 95 | 2,5 |
| 4,0 | 450 | 81 – 85 | 5,0 |
Coating type
basic
CHEMICAL COMPOSITION OF DEPOSITED METAL, %
According to AWS A5.1 / Typical Results
C
Carbon
0.09
Mn
Manganese
0.09
Si
Silicon
0.25
Cr
Chromium
1
Mo
Molybdenum
0.8
V
Vanadium
0.2
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
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Сертифікат відповідності
Declaration of perfomance
Система якості
