Premium Low-Hydrogen Structural Welding Electrode E7018
Especificações Técnicas
Key attributes
| Product Name | Low-Hydrogen Welding Electrodes |
| Material | High-Strength Carbon / Low-Alloy Steel |
| Model Number | AWS E7018 |
| Tensile Strength | ≥ 480 MPa (70,000 psi) |
| Coating Type | Low Hydrogen Iron Powder |
| Operating Current | AC / DC+ (DCEP) |
| Arc Character | Smooth & Stable |
| Penetration | Medium / Controlled |
| Brand Name | votne |
| Place of Origin | China |
| Core Diameter | 2.5 mm, 3.2 mm, 4.0 mm, 5.0 mm |
| Positions | All Positions (except vertical-down) |
| Application | Structural Steel / Bridges / Pressure Vessels |
| Standard | AWS A5.1 / ASME SFA5.1 |
| Certification | ISO 9001, CE, AWS |
| Keywords | E7018 Electrode, Low Hydrogen Rod, Structural Welding |
Product Description
Superior Structural Strength & Safety
The E7018 welding electrode is the gold standard for high-strength structural fabrication. Formulated with a special low-hydrogen iron powder coating, it delivers a minimum tensile strength of 70,000 psi, ensuring that critical joints in bridges, skyscrapers, and industrial frames meet the most stringent safety codes and performance benchmarks.
Outstanding Crack & Ductility Resistance
Engineered to produce welds with exceptional toughness and ductility, E7018 effectively resists hydrogen-induced cracking—a common failure mode in heavy-duty steel construction. This makes it the preferred choice for welding thick plates and high-carbon steels where joint integrity cannot be compromised.
High Deposition Efficiency & Smooth Arc
Thanks to the inclusion of iron powder in its coating, our E7018 rods provide a higher deposition rate than standard electrodes. This efficiency is paired with a soft, stable arc and minimal spatter, allowing professional welders to complete complex structural projects faster without sacrificing weld quality or aesthetics.
Professional Grade X-Ray Quality Welds
Our manufacturing process ensures that E7018 electrodes produce consistently clean, X-ray quality welds with superior bead appearance and mechanical properties. The easy-to-remove slag reveals a high-strength bond that is ideal for multi-pass welding in heavy industrial and marine engineering applications.
Versatility Across Critical Sectors
From offshore platforms to power plants and large-scale infrastructure, E7018 provides the reliability needed for high-pressure containment and structural load. It is compatible with both AC and DC+ power sources, offering flexibility for varied field and shop environments.
Core Advantages
Low-Hydrogen Chemical Integrity
The specialized coating is designed to maintain extremely low levels of diffusible hydrogen, providing an essential safeguard against cold cracking in heavy structural joints and high-stress environments.
Superior Mechanical Performance
With a balance of 70,000 psi tensile strength and high elongation properties, E7018 welds can withstand significant mechanical shock, vibration, and thermal stress, making them ideal for long-span bridges and high-rise frames.
Enhanced Productivity with Iron Powder
The iron powder formulation significantly increases weld metal recovery, reducing the total number of rods needed and lowering labor costs by increasing the speed of the welding process.
All-Position Structural Capability
E7018 offers excellent control and stability across all positions (except vertical-down), allowing for high-quality beads in complex structural assemblies where positional flexibility is required.
Industrial Applications
Infrastructure & Civil Engineering
The primary electrode for bridge construction, dam reinforcement, and high-rise buildings where structural safety and joint toughness are the highest priorities.
Pressure Vessel & Power Plant Fabrication
Extensively used in the manufacture of boilers, storage tanks, and high-pressure piping systems where welds must be defect-free and capable of withstanding extreme internal pressures.
Offshore & Marine Platforms
Critical for the structural integrity of offshore oil rigs and marine vessels subject to harsh environmental conditions and constant saltwater exposure.
Heavy Equipment Manufacturing
Applied in the fabrication of heavy-duty earthmoving equipment, mining machinery, and industrial cranes where high-strength, crack-resistant joints are required for longevity and safety.
Frequently Asked Questions
1. Why is E7018 called a 'low-hydrogen' electrode?
E7018 is designed with a special coating that produces very little hydrogen during the welding process. This is critical because hydrogen can lead to cracking in the weld or heat-affected zone, especially in thick materials or high-strength steels.
2. Does E7018 require a rod oven for storage?
Yes, E7018 is highly sensitive to moisture. To maintain its low-hydrogen properties, it must be stored in a dry environment. In professional/industrial settings, it is standard practice to keep E7018 in a heated rod oven to prevent moisture absorption.
3. Can I use E7018 with a basic AC stick welder?
Yes, our E7018 electrodes are formulated to run smoothly on both AC and DC+ (DCEP) power sources. This allows structural-grade welding to be performed even when DC-only equipment is not available.
4. What is the difference between E6013 and E7018?
The main differences are strength and hydrogen levels. E7018 has 70,000 psi strength and is low-hydrogen, while E6013 has 60,000 psi and is a general-purpose rutile rod. E7018 is for structural/critical work; E6013 is for general maintenance/light fabrication.
5. Do you provide batch certification for E7018 structural orders?
Yes, we provide full chemical and mechanical testing certificates for every batch of E7018 to ensure compliance with AWS and ASME standards for structural engineering and government projects.