AK-J507RH Low Hydrogen Sodium Electrode for High Toughness Low Alloy Steel Welding.
An alkaline-coated, all-position electrode for critical structures requiring high crack resistance, low temperature toughness, and clean welds with minimal spatter.
Product Overview
AK-J507RH is a low hydrogen sodium type alkaline covered electrode for manual metal arc welding of low alloy steel structures. It is designed for applications where weld metal toughness and resistance to cracking are critical, such as in shipbuilding, bridge construction, and offshore platforms.
The electrode delivers excellent welding process performance with a stable arc, low spatter, and easy slag removal. The deposited weld metal exhibits high plasticity, good low temperature toughness, and strong resistance to cold cracking, meeting the requirements of demanding structural applications.
Application: Suitable for welding of ships, bridges, offshore platforms and other important structures.
Key Benefits
Ultra-Low Hydrogen for Crack Resistance.
The sodium type alkaline coating minimizes hydrogen content in the weld metal, reducing the risk of hydrogen-induced cracking in high-strength and thick-section low alloy steels.
High Toughness at Low Temperatures.
The weld metal achieves 160 J impact energy at minus 40 degrees C, ensuring reliable performance in cold environments without brittle fracture.
Stable Arc and Low Spatter.
With DC reverse polarity, the electrode maintains a stable arc across all positions, resulting in minimal spatter and consistent weld quality.
Easy Slag Removal and Clean Appearance.
The slag layer detaches easily after solidification, reducing cleaning time and helping maintain a smooth, aesthetically pleasing weld surface.
Where It Is Used
- Welding of ship hulls and decks.
- Bridge girders and structural joints.
- Offshore platform components
- Other critical low alloy steel structures requiring high toughness and crack resistance.
Who It Is For
- Welding consumable distributors supplying electrodes for heavy structural projects.
- Shipyards and offshore construction contractors requiring low hydrogen electrodes.
- Bridge and infrastructure fabricators working with low alloy steels in low-temperature environments.
Problems It Solves
- Cracking in welds due to high hydrogen content in low alloy steel joints.
- Poor toughness in low temperature service caused by inadequate weld metal properties.
- Difficult slag removal and high spatter to rework and increased labor time.
Specifications
Published by the factory for AK-J507RH. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO 2560-B:E 4915 G AP AWS A5.5 E7015-G GB/T 5117 E5015-G |
| Element | Content |
|---|---|
| C | 0.06 |
| Si | 0.35 |
| Mn | 1.3 |
| S | 0.010 |
| P | 0.015 |
| Ni | 0.065 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 570 |
| Yield Stress (MPa) | 460 |
| Elongation (%) | 30 |
| Impact values (J) | 160J/-40℃ |
| Diameter | Current range |
|---|---|
| 2.5mm | 70-100A |
| 3.2mm | 100-140A |
| 4.0mm | 140-180A |
| 5.0mm | 180-220A |
Technical Features
- Low hydrogen sodium type alkaline coating for all-position welding with DC reverse polarity.
- Deposited metal tensile strength at least 570 MPa with yield stress at least 460 MPa.
- Elongation at least 30 percent and impact energy at least 160 J at minus 40 degrees C.
- Chemical composition: C 0.06%, Si 0.35%, Mn 1.3%, S 0.010%, P 0.015%, Ni 0.065%
- Supplied in 2.5 mm, 3.2 mm, 4.0 mm, and 5.0 mm diameters with published current ranges.
Use Guide
- Select diameter by joint thickness and set current within the recommended range: 2.5 mm at 70-100 A, 3.2 mm at 100-140 A, 4.0 mm at 140-180 A, 5.0 mm at 180-220 A.
- Use DC reverse polarity (DCEN) for optimal arc stability and penetration.
- Keep electrodes dry in sealed packaging; re-bake if exposed to moisture before use.
- Remove slag completely between passes to prevent inclusions and ensure sound welds.
How It Compares
AK-J507RH and E7015 both belong to the low hydrogen sodium type alkaline electrode family and are suitable for all-position welding. AK-J507RH offers higher impact toughness at low temperatures and improved crack resistance, making it better suited for critical structural applications. E7015 electrodes may have lower toughness and are typically used in less demanding environments. For applications requiring even higher toughness or specific alloying elements, other grades such as E7018 or E8018 may be considered.
Related Grades
Other welding electrodes in the same family.
AK-J507RH Questions
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