OZL – 9A
Permissible spatial positions during welding
OZL – 9A 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). Welding is performed in all spatial positions, except vertical “top-down” (for diameters of 3.0 and 4.0 mm welding is possible in a limited ceiling position).
Surfacing coefficient
13.5 g/ah
Consumption of electrodes
~ 1.7 kg per 1 kg of deposited metal
Application Area. OZL – 9A Welding Electrodes.
For welding structures made of heat-resistant steels 12Kh25N16G7AR, 45Kh25N20S2, Kh18N35S2 and similar, operating in oxidizing environments at temperatures up to 1050°C and in carburizing environments at temperatures up to 1000°C. Can be used for welding steels 20Kh23N13, 20Kh23N18.
Welding in all spatial positions except vertical “top-to-bottom”, with direct current of reverse polarity.
Welding Technique. OZL – 9A Welding Electrodes.
If the permissible moisture content in the coating (0.7%) is exceeded, the electrodes must be additionally baked before use at a temperature of 280-300°C for 40-60 minutes.
Regulatory Documents. OZL – 9A Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Corresponding International Standard.
E – 097 – B20
Main Weldable Materials. OZL – 9A Welding Electrodes.
Welding of heat-resistant steels operating in oxidizing environments (up to 1050°C) and carburizing environments (up to 1000°C). Main grades: 12Kh25N16G7AR, 45Kh25N20S2, Kh18N35S2.
Special Properties. OZL – 9A Welding Electrodes.
Heat resistance: oxidation depth at 1050°C for 1000 hours — 0.15 mm. High-temperature strength: long-term strength of 15 MPa at 1000°C for 700 hours. Metal structure — austenitic-carbide. Stable arc burning, minimal spatter.
Chemical Composition of Deposited Metal, %
| Ni | Si | Mn | P | S | Cr | C | |
| Minimum | 14.50 | < 0.70 | 5.00 | <0.030 | <0.020 | 22.50 | 0.22 |
| Maximum | 17.00 | < 0.70 | 7.50 | <0.030 | <0.020 | 26.00 | 0.35 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 3.0 | 90-120 | 70-110 | 80-110 |
| 4.0 | 130-160 | 120-140 | 120-150 |
| 5.0 | 170-220 | 150-200 | 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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