AKR317 Low-Hydrogen Sodium-Coated Electrode for Heat-Resistant Steel Welding.
A low-hydrogen-sodium-coated electrode for all-position welding of chromium-molybdenum-vanadium pearlitic heat-resistant steel, delivering high strength and excellent creep and fatigue resistance up to 600℃.
Product Overview
AKR317 is a low-hydrogen-sodium-coated electrode designed for manual metal arc welding of chromium-molybdenum-vanadium pearlitic heat-resistant steel, including 1Cr-0.5Mo 0.25V steel plates used in large-scale equipment exposed to harsh service conditions and complex corrosive media.
The electrode provides excellent welding processability and can be used in all positions, making it suitable for on-site installation and construction where consistent performance is critical.
The deposited metal has low levels of impurities, with sulfur ≤ 0.010% and phosphorus ≤ 0.012%, and meets the chemical and mechanical requirements specified in GB/T 5118 E5515-1CMV.
AKR317 is supplied to EN ISO 3580 B E5515-G, AWS A5.5 E8015-G, and GB/T 5118 E5515-1CMV classifications.
Application: Suitable for welding chromium-molybdenum-vanadium vanadium pearlitic heat-resistant steel (1Cr-0.5Mo 0.25V) steel plates for large-scal equipment with harsh service conditions and complex corrosive media such as petrochemical, coal chemical, and thermal power plants.
Key Benefits
High Strength and Creep Resistance.
The deposited metal achieves a tensile strength of 650 MPa and yield stress of 565 MPa, with elongation of 23% and impact values of 149 J, 138 J, and 169 J at 20℃, ensuring reliable performance under high-temperature and high-stress conditions.
Low Impurity Content
Sulfur content is ≤ 0.003% and phosphorus ≤ 0.008%, with other impurities such as As, Sn, and Sb each ≤ 0.003%, resulting in a pure weld metal with minimal risk of embrittlement.
All-Position Welding Capability
The electrode maintains stable arc performance and good bead control in flat, horizontal, vertical, and overhead positions, supporting efficient on-site welding without switching consumables.
Suitable for Harsh Service Environments.
Welded joints retain high strength and oxidation resistance at temperatures below 600℃, with excellent creep and fatigue resistance, making the electrode ideal for petrochemical, coal chemical, and thermal power plant applications.
Where It Is Used
- Welding of 1Cr-0.5Mo 0.25V chromium-molybdenum-vanadium pearlitic heat-resistant steel plates.
- Construction and maintenance of large-scale equipment in petrochemical and coal chemical plants.
- High-temperature components in thermal power plants exposed to complex corrosive media.
- On-site welding in demanding industrial environments requiring consistent, code-compliant joints.
Who It Is For
- Welding consumable distributors supplying heat-resistant steel electrodes for industrial projects.
- Petrochemical and power plant maintenance teams requiring reliable, high-performance welding consumables.
- Fabricators of pressure vessels and heat exchangers operating under high-temperature conditions.
Problems It Solves
- Achieving high-strength, creep-resistant welds in heat-resistant steels used in harsh industrial environments.
- Reducing the risk of weld metal embrittlement from high sulfur and phosphorus levels in low-alloy steels.
- Ensuring consistent weld quality across all positions during on-site construction without rework.
Specifications
Published by the factory for AKR317. Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Standard | Designation |
|---|---|
| Classification | EN ISO 3580 B E5515-G AWS A5.5 E8015-G GB/T 5118 E5515-1CMV |
| Element | Content |
|---|---|
| C | 0.08 |
| Mn | 0.76 |
| P | 0.008 |
| S | 0.003 |
| Si | 0.21 |
| Cr | 1.27 |
| Mo | 0.58 |
| V | 0.23 |
| As | 0.003 |
| Sn | 0.001 |
| Sb | 0.001 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 650 |
| Yield Stress (MPa) | 565 |
| Elongation (%) | 23 |
| Impact values (J) | 149J 138J 169J/20℃ |
Technical Features
- Low-hydrogen-sodium coating for reduced hydrogen-induced cracking risk.
- Deposited metal tensile strength ≥ 650 MPa, yield stress ≥ 565 MPa, elongation ≥ 23%
- Impact values ≥ 138 J at 20℃, with typical values of 149 J and 169 J.
- Sulfur ≤ 0.003%, phosphorus ≤ 0.008%, and other impurities ≤ 0.003% by weight.
- Supplied to EN ISO 3580 B E5515-G, AWS A5.5 E8015-G, and GB/T 5118 E5515-1CMV classifications.
Use Guide
- Select electrode diameter based on joint thickness and welding position, ensuring current remains within the recommended range for stable arc and proper penetration.
- Clean joint surfaces thoroughly to remove oil, rust, moisture, and contaminants before welding to prevent porosity and cracking.
- Store electrodes in sealed packaging and re-dry if exposed to moisture; follow re-baking procedures as per standard practice.
- Remove slag completely between passes to avoid inclusions and ensure full fusion in subsequent runs.
How It Compares
AKR317 and E8015-G both meet AWS A5.5 E8015-G and are low-hydrogen electrodes for heat-resistant steels. AKR317 is specifically formulated for chromium-molybdenum-vanadium pearlitic steels with enhanced creep and fatigue resistance. Basic-coated electrodes like E8015-G are suitable for high-strength applications but may require stricter storage and handling. AKR317 offers superior purity and mechanical properties in high-temperature service environments.
Related Grades
Other welding electrodes in the same family.
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