AK-W807Ni Low-Temperature Ni-Containing Electrode for 1.5Ni Steel at -80℃.
A low-hydrogen sodium-coated electrode for all-position welding of 1.5Ni steel structures operating at -80℃, with deposited metal maintaining impact toughness down to that temperature.
Product Overview
AK-W807Ni is a low-temperature steel electrode with nickel content, featuring a low-hydrogen sodium coating and designed for DC reverse polarity welding in all positions.
The electrode is intended for welding 1.5Ni steel structures that operate at -80℃, where the deposited metal retains impact toughness at that extreme temperature.
It meets the EN ISO 2560-B:E 8015-C 1, AWS A5.5 E8015-C1, and GB/T 5117 E5015-N5 classifications, with a chemical composition that includes 1.00% Ni and controlled levels of carbon, silicon, manganese, sulfur, and phosphorus.
Application: Welding 1.5Ni steel structures working at -80℃.
Key Benefits
Impact Toughness at -80℃.
The deposited metal achieves a minimum impact value of 27 J at -80℃, ensuring reliable performance in cryogenic service conditions.
Low-Hydrogen Sodium Coating
The low-hydrogen sodium coating reduces the risk of hydrogen-induced cracking, especially in high-strength or thick-section welds.
All-Position Welding Capability
AK-W807Ni can be used in flat, horizontal, vertical, and overhead positions, allowing one electrode to cover all joint orientations.
Controlled Chemical Composition
The composition includes 0.08% C, 0.6% Si, 1.25% Mn, 0.035% S, 0.035% P, and 1.00% Ni, which supports both strength and toughness in low-temperature applications.
Where It Is Used
- Welding of 1.5Ni steel structures in cryogenic service.
- Fabrication of pressure vessels and piping for low-temperature environments.
- Maintenance and repair of equipment operating at -80℃.
- Structures requiring high impact toughness at sub-zero temperatures.
Who It Is For
- Welding consumable distributors supplying low-temperature welding electrodes.
- Fabricators working with 1.5Ni steel for cryogenic applications.
- Maintenance teams in oil & gas and petrochemical plants operating at low temperatures.
Problems It Solves
- Achieving required impact toughness at -80℃ in welds made on 1.5Ni steel structures.
- Avoiding hydrogen cracking in low-temperature welds through use of a low-hydrogen electrode.
- Using a single electrode for all welding positions on complex joints without requalification.
Specifications
Published by the factory for AK-W807Ni. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification 1 | EN ISO 2560-B:E 8015-C 1 |
| Classification 2 | AWS A5.5 E8015-C1 |
| Classification 3 | GB/T 5117 E5015-N5 |
| Element | Content |
|---|---|
| C | 0.08 |
| Si | 0.6 |
| Mn | 1.25 |
| S | 0.035 |
| P | 0.035 |
| Ni | 1.00 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | ≥490 |
| Yield Stress (MPa) | ≥390 |
| Elongation (%) | ≥22 |
| Impact values (J) | ≥27J/-80℃ |
| Diameter | Current range |
|---|---|
| 2.5mm | 60-100A |
| 3.2mm | 80-130A |
| 4.0mm | 140-200A |
| 5.0mm | 180-240A |
Technical Features
- Low-hydrogen sodium coating for DC reverse polarity welding.
- Deposited metal tensile strength at least 490 MPa, yield stress at least 390 MPa, elongation at least 22 percent.
- Impact toughness at least 27 J at -80℃.
- Chemical composition: C 0.08%, Si 0.6%, Mn 1.25%, S 0.035%, P 0.035%, Ni 1.00%
- Available in 2.5 mm, 3.2 mm, 4.0 mm, and 5.0 mm diameters.
Use Guide
- Select diameter based on joint thickness and position, then set current within the recommended range: 2.5 mm (60-100 A), 3.2 mm (80-130 A), 4.0 mm (140-200 A), 5.0 mm (180-240 A).
- Ensure the joint surfaces are clean and free of oil, rust, moisture, and paint before welding.
- Store electrodes in sealed packaging and re-bake if exposed to air or moisture before use.
- Remove slag completely between passes to prevent inclusions and ensure sound welds.
How It Compares
AK-W807Ni and E8015 electrodes both provide low-hydrogen, all-position welding for low-temperature applications. However, AK-W807Ni contains 1.00% Ni, which enhances toughness at -80℃, while standard E8015 electrodes may not have the same nickel content or low-temperature performance. Other low-temperature electrodes may require higher preheat or different storage, but AK-W807Ni is designed for direct use in cryogenic service with minimal handling requirements.
Related Grades
Other welding electrodes in the same family.
AK-W807Ni Questions
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