OZCH – 3
Permissible spatial positions during welding
OZCH – 3 Welding Electrodes
Welding electrodes for gray, high-strength and malleable cast iron
Prices for welding electrodes
Type of coverage
Rutile oil . The coating contains rutile concentrate (titanium dioxide), which ensures the stability of the welding process.
Current and polarity
Direct current of reverse polarity (DC+). Welding is performed in the lower and vertical positions.
Surfacing coefficient
11.0 g/ah
Consumption of electrodes
~ 1.6 kg per 1 kg of deposited metal
Application Area. OZCH – 3 Welding Electrodes.
Electrodes with a basic coating, intended for cold welding and sealing of casting defects in parts made of gray and high-strength cast iron. Welding in flat and vertical positions with direct current of reverse polarity.
Welding Technique. OZCH – 3 Welding Electrodes.
Welding is performed with short beads 30-50 mm long with interpass cooling in air to a temperature not exceeding 100°C and mandatory forging of the deposited bead with light hammer blows. The process is carried out with minimal heat input.
Long cracks are divided into sections and welding is carried out on sections in a specific sequence.
The first bead should be laid in the groove root using an electrode with a diameter of 2.5 or 3 mm at a low welding current. When sealing large defects, OZCH-3 electrodes are used in combination with OZCHN-1 electrodes, alternately alternating layers.
Regulatory Documents. OZCH – 3 Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Main Weldable Materials. OZCH – 3 Welding Electrodes.
Cold welding and sealing of defects in parts made of gray (SCh) and high-strength (VCh) cast iron. Optimal for creating the first (root) ductile layer.
Special Properties. OZCH – 3 Welding Electrodes.
The electrodes have low penetration capability.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | Fe | Ni | Cu | S | |
| Typical Value | 0.30 | 0.50 | 0.50 | <0.003 | 1.50 | Base | 1.50 | <0.005 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 2.5 | 50-80 | 50-70 | – |
| 3.0 | 70-100 | 70-100 | – |
| 4.0 | 100-130 | 100-120 | – |
| 5.0 | 120-160 | 120-150 | – |
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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