NII – 48G
Permissible spatial positions during welding
NII – 48G Welding Electrodes
Electrodes for welding high-alloy steels
Prices for welding electrodes
Type of coverage
Basic. (Low-hydrogen B).
Current and polarity
Direct current of reverse polarity (DC +, “plus” on the electrode).
Surfacing coefficient
10.0 – 12.0 g/ah
Consumption of electrodes
~ 1.6 – 1.7 kg per 1 kg of deposited metal
Application Area. NII – 48G Welding Electrodes.
Welding of critical structures made of low-alloy and special steels, high-manganese steels of the 110G13L type, as well as welding of such steels with chromium-nickel austenitic steels. Welding in all spatial weld positions with direct current of reverse polarity. We manufacture NII – 48G welding electrodes in the shortest possible time.
Welding Technique. NII – 48G Welding Electrodes.
Welding with NII-48G electrodes is performed with a short and extremely short arc length on a surface cleaned of contaminants. The process is carried out with direct current of reverse polarity (DC+) in all spatial positions, except vertical “top-to-bottom”.
Electrodes with a diameter of 5.0 mm are not intended for welding in the overhead position. Baking modes: If the permissible moisture content in the coating is exceeded, the electrodes must be baked before use.
Regulatory Documents. NII – 48G Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Corresponding International Standard.
E – 0050 – B20 (nickel type)
Main Weldable Materials. NII – 48G Welding Electrodes.
Welding and surfacing of high-manganese steels (110G13L), their joints with low-alloy and chromium-nickel austenitic steels. For repair and manufacture of wear-resistant parts operating under impact and abrasive wear.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | S | Cr | Ni | |
| Minimum | < 0.13 | 0.50 | 4.80 | <0.040 | <0.020 | 18.5 | 8.50 |
| Maximum | < 0.13 | 1.20 | 7.00 | <0.040 | <0.020 | 21.5 | 11.00 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 3.0 | 90-130 | 50-90 | 50-90 |
| 4.0 | 140-180 | 110-150 | 110-150 |
| 5.0 | 180-220 | 160-200 | 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
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