ANO – 4
Permissible spatial positions during welding
ANO-4 Welding Electrodes
Electrodes for welding of carbon and low alloy steels
Prices for welding electrodes
Type of coverage
Rutile is a carbonate. It provides easy arc ignition, stable combustion, and good separation of the slag crust. Gorenje.
Current and polarity
Direct current and alternating current (AC/DC). Direct current welding of any polarity (forward and reverse) is allowed.
Surfacing coefficient
8.0 – 9.0 g/ah
Consumption of electrodes
~ 1.7 kg per 1 kg of deposited metal
Application Area. ANO-4 Welding Electrodes.
Designed for welding critical structures made of carbon steels with a carbon content of up to 0.25% and a tensile strength of up to 490 MPa. Allow welding of wet, rusty, poorly cleaned metal (free from oxides and other contaminants). The electrodes are characterized by easy arc striking.
Welding in all spatial positions except vertical “top-to-bottom”, with alternating current and direct current of reverse polarity. Welding is performed with a medium arc length, tilting the electrode in the direction of welding (backhand technique).
Welding Technique. ANO-4 Welding Electrodes.
It is recommended to perform welding with a medium arc length, tilting the electrode at a backhand angle (away from the welding direction).
Regulatory Documents. ANO-4 Welding Electrodes.
GOST 9466-75, GOST 9467-75, TU 51-00154325-21-02, OST 5.9224-75
Corresponding International Standard.
E 430 – R24
Special Properties. ANO-4 Welding Electrodes.
The electrodes allow welding of wet, rusty, poorly cleaned metal (free from oxides and other contaminants). They are distinguished by easy arc striking and low susceptibility to porosity at the root of fillet welds. Allow welding at increased parameters.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | S | |
| Typical Value | 0.10-0.12 | 0.12-0.20 | 0.35-0.70 | ≤0.045 | ≤0.040 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 2.5 | 60-90 | 50-80 | 50-80 |
| 3.0 | 80-100 | 60-100 | 60-90 |
| 4.0 | 120-150 | 110-140 | 110-140 |
| 5.0 | 180-220 | 170-200 | not recommended |
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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
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+375 (29) 688-27-06
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