Description
N-7018 is a heavy-duty low hydrogen SMAW electrode formulated to deliver reliable, high-strength welds for structural steel, pressure vessels, heavy fabrication, and general engineering applications. Its iron-powder-enriched coating boosts deposition rate, providing faster fill and increased productivity without compromising weld quality.
The weld deposits exhibit excellent toughness, high tensile strength, and remarkable crack resistance, making the electrode ideal for jobs where consistent performance and certification compliance are essential.
Engineered for smooth operability, N-7018 maintains a stable arc, creates minimal spatter, and ensures clean, self-lifting slag, reducing cleanup time and enhancing welding efficiency.
To maintain quality from warehouse to jobsite, each batch comes in vacuum-packed, moisture-protected packaging, preventing hydrogen pickup and extending shelf life.
TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%)
| C | Si | Mn | P | S |
|---|---|---|---|---|
| 0.08 | 0.56 | 1.02 | 0.013 | 0.010 |
This balanced chemical mix supports strong, ductile welds with low impurity levels.
TYPICAL MECHANICAL PROPERTIES
| Property | Value |
|---|---|
| Yield Strength | 510 N/mm² (74 KSI) |
| Tensile Strength | 580 N/mm² (84 KSI) |
| Elongation | 30% |
| Impact Toughness | -29°C, 145 J ( -20°F, 107 ft-lbs ) |
These mechanical values reflect the electrode’s ability to maintain reliability under stress, impact, and varying temperatures.
DIFFUSIBLE HYDROGEN CONTENT
| Diameter (mm) | Current | Re-drying Condition | Hydrogen Content (cc/100g) |
|---|---|---|---|
| 4.0 | AC | 350°C × 0.5 hr | 3.0 |
Low hydrogen levels help prevent hydrogen-induced cracking in demanding applications.
AVAILABLE SIZES & RECOMMENDED CURRENT RANGE
| Diameter (mm) | Length (mm) | Flat (A) | Vertical / Overhead (A) |
|---|---|---|---|
| 2.5 | 350 | 70–100 | 60–90 |
| 3.2 | 350 | 100–140 | 80–120 |
| 4.0 | 400 | 150–200 | 120–160 |
| 5.0 | 450 | 190–240 | 140–180 |
| 6.0 | 450 | 250–320 | — |
Polarity: AC, DC+
Welding Positions: All positions except vertical down
Approvals: ABS, BV, DNV.GL, LRS, NKK, CE
APPLICATION AREAS
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Structural steel fabrication
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Bridges & heavy infrastructure
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Industrial machinery
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Shipbuilding & offshore structures
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Pressure vessels and pipelines
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General maintenance & repair welding
PACKAGING DETAILS
N-7018 electrodes are protected using vacuum-sealed packs, ensuring:
-
Minimal moisture absorption
-
Extended shelf stability
-
Better performance in humid or onsite conditions
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Reduced need for re-baking
This packaging method guarantees the electrode arrives ready for reliable use.
IMPORTANT NOTICE
All technical values listed above are based on controlled laboratory welds and should be taken as typical reference data. Results may vary depending on welding procedure, material properties, joint design, temperature, and operator skill. Users should conduct their own procedure qualification tests before deploying in critical applications.
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