UONI 13/55
Permissible spatial positions during welding
UONI 13/55 Welding Electrodes
Electrodes for welding of carbon and low alloy steels
Prices for welding electrodes
Type of coverage
Basic. It provides a seam metal with high resistance to the formation of crystallization cracks and low hydrogen content.
Current and polarity
Direct current of reverse polarity (DC+)
Surfacing coefficient
9.0 – 9.5 g/ah
Consumption of electrodes
~ 1.7 kg per 1 kg of deposited metal
Application Area. UONI 13/55 Welding Electrodes.
UONI-13/55 are electrodes with a basic coating. The electrodes are intended for manual arc welding of particularly critical structures made of carbon and low-alloy steels, when increased requirements are imposed on the weld metal in terms of ductility, impact toughness, and resistance to crack formation at normal and low temperatures.
Welding in all spatial positions with direct current of reverse polarity. Welding in the flat position is performed at increased parameters with the electrode tilted in the welding direction (backhand angle). A short arc length is recommended.
Welding Technique. UONI 13/55 Welding Electrodes.
Welding is performed only with a short arc (touch welding or arc of minimum length) on edges thoroughly cleaned of rust, scale, oil, and other contaminants. Arc lengthening is not permitted to avoid porosity formation. When welding reinforcement using the bath method, process continuity must be maintained and welding should begin at maximum current.
Regulatory Documents. UONI 13/55 Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Corresponding International Standard.
E 514 – B20
Special Properties. UONI 13/55 Welding Electrodes.
The electrodes ensure the production of weld metal with high resistance to solidification cracking and low hydrogen content. They have good welding and technological properties: smooth and stable arc burning, minimal spatter, good weld formation, easy slag removal.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | S | |
| Typical Value | 0.10-0.11 | 0.12-0.50 | 0.42-1.40 | ≤0.03-0.035 | ≤0.02-0.03 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 2.0 | 50-80 | 40-60 | 40-60 |
| 2.5 | 60-90 | 50-80 | 50-80 |
| 3.0 | 80-110 | 70-90 | 70-90 |
| 4.0 | 130-160 | 120-150 | 120-150 |
| 5.0 | 180-200 | 160-180 | 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
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