MNCH – 2
Permissible spatial positions during welding
MNCH – 2 Welding Electrodes
Welding electrodes for gray, high-strength and malleable cast iron
Prices for welding electrodes
Type of coverage
Special (basic). It provides easy arc ignition (with a single touch), stable combustion, minimal splashing, easy separation of the slag crust and good seam formation.
Current and polarity
Direct current of reverse polarity (DC+) in the lower and vertical positions.
Surfacing coefficient
11.00-12.0 g/ah
Consumption of electrodes
~ 1.8 kg per 1 kg of deposited metal
Application Area. MNCH – 2 Welding Electrodes.
Designed for cold welding, sealing of casting defects, and surfacing of parts made of gray, high-strength, and malleable cast iron in flat and vertical positions with direct current of reverse polarity.
Recommended for sealing the first layer in joints requiring high weld density, as well as for welding joints that have requirements for surface cleanliness after machining.
Welding Technique. MNCH – 2 Welding Electrodes.
Welding is performed with short beads 20-30 mm long with interpass cooling in air to a temperature not exceeding 60°C and forging of the deposited bead with light hammer blows.
Long cracks are divided into sections 50-60 mm long and welding is carried out on sections in a specific sequence. Welding is performed on a surface thoroughly cleaned of contaminants.
Regulatory Documents. MNCH – 2 Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Main Weldable Materials. MNCH – 2 Welding Electrodes.
Cold welding, sealing of casting defects, and surfacing of parts made of gray, high-strength (VCh), and malleable (KCh) cast iron. Especially recommended for the first (root) layer requiring high density, and for subsequent machining.
Special Properties. MNCH – 2 Welding Electrodes.
The electrodes provide deposited metal with high machinability, as well as corrosion resistance in liquid aggressive environments and hot gases.
Chemical Composition of Deposited Metal, %
| Cu | Fe | Ni | Mn | |
| Minimum | 24.00 | 60.00 | 2.00 | 1.80 |
| Maximum | 29.00 | 68.00 | 8.00 | 2.60 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 3.0 | 60-110 | 70-90 | – |
| 4.0 | 130-160 | 120-130 | – |
| 5.0 | 180-220 | 140-190 | – |
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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