OZL – 17U
Permissible spatial positions during welding
OZL – 17U 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
14.0 g/ah
Consumption of electrodes
~ 1.7 kg per 1 kg of deposited metal
Application Area. OZL – 17U Welding Electrodes.
For welding equipment and structures made of corrosion-resistant alloys 06KhN28MDT, 03KhN28MDT and steel grade 03Kh21N21M4GB, predominantly up to 12 mm thick, operating in environments of sulfuric and phosphoric acids with impurities of fluoride compounds. Welding in all spatial positions except vertical “top-to-bottom” with direct current of reverse polarity.
Welding Technique. OZL – 17U 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 – 17U Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Corresponding International Standard.
E – 400 – B20
Main Weldable Materials. OZL – 17U Welding Electrodes.
Welding of equipment made of acid-resistant alloys of grades 06KhN28MDT, 03KhN28MDT, 03Kh21N21M4GB. For structures operating in sulfuric and phosphoric acids and environments containing fluoride compounds (e.g., in fertilizer production, ore processing).
Special Properties. OZL – 17U Welding Electrodes.
High corrosion resistance in sulfuric and phosphoric acids with fluoride impurities. Resistance to intercrystalline corrosion. Absence of hot cracks in welds. Corrosion resistance at the level of the base metal, for thicknesses up to 12 mm.
Chemical Composition of Deposited Metal, %
| Ni | Si | Mn | P | S | Cr | C | Mo | Cu | Nb | |
| Minimum | 25.00 | < 0.70 | 1.50 | <0.030 | <0.020 | 21.00 | <0.04 | 2.60 | 2.50 | 0.40 |
| Maximum | 29.00 | < 0.70 | 2.50 | <0.030 | <0.020 | 25.00 | <0.04 | 4.30 | 3.50 | 0.50 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 3.0 | 90-130 | 80-110 | 80-110 |
| 4.0 | 130-160 | 120-150 | 120-150 |
| 5.0 | 180-220 | 170-200 | not recommended |
We respond quickly to questions on Telegram
-
Bottom horizontal or in a boat
-
Bottom to the corner
-
Horizontal seam on a vertical plane
-
Vertical seam for lifting
-
Vertical seam for descent
-
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:
Social network chat:
Social network chat:
