AK-J556RH Ultra-Low Hydrogen Electrode for High Toughness Low Alloy Steel Welding.
A potassium type alkaline coated electrode for all-position welding of critical low alloy steel structures with excellent crack resistance and impact toughness at low temperatures.
Product Overview
AK-J556RH is an ultra-low hydrogen, high toughness low alloy steel electrode with a low hydrogen potassium type alkaline coating. It is designed for manual metal arc welding of important low alloy steel structures requiring high reliability and performance.
The electrode supports AC and DC welding and performs well in all positions. It delivers a stable arc, minimal spatter, easy slag removal, and a smooth, aesthetically pleasing weld bead. The deposited metal exhibits high plasticity, toughness, and resistance to cracking.
Application: It is suitable for the welding of important low-alloy steel structures such as offshore oil production platforms, ships, and pressure equipment.
Key Benefits
Ultra-Low Hydrogen for Crack Resistance.
The potassium type alkaline coating ensures low hydrogen levels in the weld metal, reducing the risk of hydrogen-induced cracking in high-strength low alloy steels.
Excellent Impact Toughness at Low Temperatures.
The deposited metal achieves 170 J at minus 40 degrees C, meeting the demands of service in cold environments such as offshore platforms and Arctic regions.
Stable Arc and Low Spatter.
The electrode provides a stable arc across AC and DC currents, with minimal spatter, improving welding efficiency and reducing post-weld cleanup.
Easy Slag Removal and Clean Bead Profile.
Slag detaches easily after welding, reducing inter-pass cleaning time and minimizing the risk of slag entrapment in subsequent passes.
Where It Is Used
- Welding of offshore oil production platforms.
- Construction and repair of ships and marine structures.
- Fabrication and maintenance of pressure equipment and vessels.
- Critical low alloy steel structures requiring high toughness and crack resistance.
Who It Is For
- Welding consumable distributors supplying electrodes for heavy industrial applications.
- Shipyards and offshore fabrication yards working with low alloy steels.
- Pressure vessel and boiler manufacturers requiring high integrity welds.
- Maintenance teams working on critical infrastructure in cold climates.
Problems It Solves
- Cracking in welds due to high hydrogen content in low alloy steel joints.
- Poor impact toughness in low-temperature service environments.
- Difficult slag removal and high spatter levels with conventional electrodes.
- Need for multiple electrode types to cover different positions and material requirements.
Specifications
Published by the factory for AK-J556RH. 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 5515 G AP AWS A5.5 E8016-G GB/T 5117 E5516-G |
| Element | Content |
|---|---|
| C | 0.07 |
| Si | 0.45 |
| Mn | 1.6 |
| S | 0.010 |
| P | 0.015 |
| Ni | 0.09 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 580 |
| Yield Stress (MPa) | 480 |
| Elongation (%) | 28 |
| Impact values (J) | 170J/-40℃ |
| Diameter | Current range |
|---|---|
| 2.5mm | 70-100A |
| 3.2mm | 100-140A |
| 4.0mm | 140-180A |
| 5.0mm | 180-220A |
Technical Features
- Low hydrogen potassium type alkaline coating for all-position welding.
- Deposited metal tensile strength at least 580 MPa with yield stress at least 480 MPa.
- Elongation at least 28 percent and impact energy at least 170 J at minus 40 degrees C.
- Supplied in 2.5 mm, 3.2 mm, 4.0 mm, and 5.0 mm diameters with published current ranges.
- Complies with EN ISO 2560-B:E 5515 G, AWS A5.5 E8016-G, and GB/T 5117 E5516-G standards.
Use Guide
- Select diameter by joint thickness and set current within the published 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.
- Clean joint surfaces thoroughly from oil, rust, moisture, and paint before welding.
- Store electrodes in sealed packaging and re-bake if exposed to air or moisture.
- Remove slag completely between passes to prevent inclusions and ensure sound welds.
How It Compares
AK-J556RH and E8016-G both belong to the same AWS A5.5 E8016-G classification and are low hydrogen electrodes for high toughness applications. AK-J556RH uses a potassium type alkaline coating, which allows AC and DC use and provides excellent arc stability and slag removal. Basic electrodes with sodium coatings are typically DC-only and may require stricter drying. For applications requiring the highest crack resistance and impact toughness at low temperatures, AK-J556RH is suitable for critical structures where performance is paramount.
AK-J556RH Questions
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