UONII 13/55
Permissible spatial positions during welding
UONII 13/55 Welding Electrodes
Electrodes for welding of carbon and low alloy steels
Prices for welding electrodes
Type of coverage
Basic.
Current and polarity
Constant (=), inverse [+]
Surfacing coefficient
9.0-9.5 g/ah
Consumption of electrodes
~ 1.7 kg per 1 kg of deposited metal
Application Area. UONII 13/55 Welding Electrodes.
UONII 13/55 are electrodes for particularly critical structures where the requirements for reliability and safety are maximum:
• Bridge construction: welding of load-bearing elements operating under high loads and alternating stresses.
• Shipbuilding and ship repair: welding of hull structures and critical components.
• Manufacturing of pressure vessels: welding of tanks and pipelines operating under high pressure.
• Oil and gas industry: welding of pipelines and structures operated in harsh conditions.
• Heavy engineering: manufacturing of frames, machine beds, and critical equipment components.
Welding Technique. UONII 13/55 Welding Electrodes.
It is recommended to perform welding with a short arc length, tilting the electrode at a “backhand” angle (away from the welding direction) to ensure deep penetration and reliable protection of the weld pool from atmospheric nitrogen and oxygen. Arc lengthening is not permitted to avoid porosity formation.
Regulatory Documents. UONII 13/55 Welding Electrodes.
GOST 9466-75, GOST 9467-75, TU 51-00154325-01-95, OST 5.9224-75
Corresponding International Standard.
E 514 – B20
Special Properties. UONII 13/55 Welding Electrodes.
Not prone to crack formation and porosity.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | S | |
| Minimum | 0.06 | 0.18 | 0.80 | 0.000 | 0.000 |
| Maximum | 0.11 | 0.50 | 1.20 | 0.030 | 0.030 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 2.5 | 70-90 | 60-80 | 55-65 |
| 3.0 | 90-120 | 85-110 | 60-80 |
| 4.0 | 140-170 | 120-150 | 80-100 |
| 5.0 | 180-210 | 150-180 | not recommended |
We respond quickly to questions on Telegram
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Bottom horizontal or in a boat
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Bottom to the corner
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Horizontal seam on a vertical plane
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Vertical seam for lifting
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Vertical seam for descent
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Ceiling seam
All covered electrodes are sensitive to moisture absorption. Excessive moisture content in the coating can lead to porosity or hydrogen cracking.
However, if the climatic storage conditions meet the following requirements, moisture absorption by the electrodes is minimal:
• 5–15°C at a maximum relative humidity of 60%
• 15–25°C at a maximum relative humidity of 50%
• >25°C at a maximum relative humidity of 40%
At lower temperatures, maintaining the storage temperature 10°C above the ambient temperature is sufficient to achieve the required moisture content level. Cold packages must be allowed to warm up to ambient temperature before opening.
At higher temperatures, the required moisture content in the air can be achieved by dehumidification. The shelf life of electrodes under the above conditions shall not exceed three years.
• Covered electrodes with a basic coating and low hydrogen content must be baked prior to each use whenever requirements regarding the content of diffusible hydrogen and/or the soundness of the deposited metal are specified.
• Stainless steel electrodes with a basic coating may produce porosity during welding if the humidity levels during their storage did not meet the requirements. To restore their original properties, they also need to be baked.
• Electrodes for welding carbon steels with a cellulosic or rutile coating typically do not require baking.
• Electrodes that have suffered serious damage due to exposure to moisture cannot be restored by rebaking and must be rejected.
Contacts
Company phone numbers:
+375 (29) 688-27-06
+375 (17) 388-28-02 accountant
+375 (17) 388-28-03 sales department
Email address:
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