ZIO – 8
Permissible spatial positions during welding
ZIO – 8 Welding Electrodes
Electrodes for welding high-alloy steels
Prices for welding electrodes
Type of coverage
Basic (calcium fluoride).
Current and polarity
Direct current of reverse polarity (DC +, “plus” on the electrode). The no-load voltage is at least 65 V.
Surfacing coefficient
11.5 – 13.5 g/ah
Consumption of electrodes
~ 1.6 kg per 1 kg of deposited metal
Application Area. ZIO – 8 Welding Electrodes.
ZIO-8 electrodes are used for welding corrosion-resistant steels of the austenitic class grades 08Kh18N10T, 12Kh18N10T, 8N12T, 10Kh17N13M2T, 10Kh17N3M3T in assemblies and structures, special marine power plants, and marine engineering products.
Welding in all spatial weld positions, except vertical top-to-bottom, with direct current of reverse polarity.
Welding Technique. ZIO – 8 Welding Electrodes.
Welding is performed with a short arc using direct current of reverse polarity (DC+) in all positions, except vertical “top-to-bottom” (5 mm diameter is not used in overhead position).
Craters must be filled. Baking: if the moisture content is exceeded, the electrodes are baked for 1–2 hours at a temperature of 200–380°C (depending on the manufacturer: 300–330°C, 360–380°C, 200–250°C, or 220±20°C according to RD).
Regulatory Documents. ZIO – 8 Welding Electrodes.
GOST 9466-75, GOST 9467-75.
Corresponding International Standard.
E – 2003 – B20 (AISI 309L type)
Main Weldable Materials. ZIO – 8 Welding Electrodes.
Welding of austenitic corrosion-resistant steels of grades: 08Kh18N10T, 12Kh18N10T, 08Kh12N12T, 10Kh17N13M2T, 10Kh17N13M3T and similar. For critical structures in shipbuilding, power engineering, and chemical machinery manufacturing.
Chemical Composition of Deposited Metal, %
| C | Si | Mn | P | S | Ni | |
| Minimum | < 0.12 | < 1.00 | < 2.70 | <0.030 | <0.020 | 11.50 |
| Maximum | < 0.12 | < 1.00 | < 2.70 | <0.030 | <0.020 | 14.00 |
Welding Recommendations (Current, A)
| Diameter, mm | Weld Position | ||
| Flat | Vertical | Overhead | |
| 3.0 | 90-130 | 80-110 | 80-110 |
| 4.0 | 130-160 | 120-140 | 120-140 |
| 5.0 | 170-200 | 150-180 | 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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