E7018 Welding Rod
The E7018 electrode is a low-alloy steel welding rod suitable for all-position welding. It provides excellent processing properties, reduces spatter and distortion, and allows easy slag removal. The 7018 rod is widely used for structural steel fabrication including boilers, high-pressure vessels, bridges, pipelines, and other heavy industrial applications.
Key Specifications
Type of Coating: Low hydrogen, potassium, iron powder
Welding Positions: Flat (F), Horizontal (H), Horizontal Fillet (HF), Overhead (OH), Vertical (V)
Compatible Current: DCEP or AC
Storage & Handling Notices:
Pre-bake rods at 350°C for 1 hour before use.
Ensure surfaces to be welded are clean and free from oil, rust, moisture, and contaminants.
Short arc and narrow-gap welding is recommended for best results.
Chemical Composition of Deposited Metal (%)
| Element | C | Mn | Si | P | S | Ni | Cr | Mo | V |
|---|---|---|---|---|---|---|---|---|---|
| Standard | ≤0.15 | ≤1.60 | ≤0.90 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.20 | ≤0.30 | ≤0.08 |
| Typical | 0.068 | 1.38 | 0.41 | 0.015 | 0.012 | 0.035 | 0.011 | 0.001 | 0.002 |
Mechanical Properties of Deposited Metal
| Property | TENSILE STRENGTH RM (MPa) | YIELD STRENGTH REL (MPa) | ELONGATION A (%) | -30°C IMPACT ENERGY KV2 (J) |
|---|---|---|---|---|
| Standard | ≥490 | ≥400 | ≥20 | ≥27 |
| Typical | 560 | 465 | 29 | 130 |
Sizes & Recommended Current (DC+ or AC, open circuit voltage ≥70V)
| Welding Rod Diameter (mm) | 2.5 | 3.2 | 4.0 | 5.0 |
|---|---|---|---|---|
| Welding Rod Length (mm) | 300 | 350 | 400 | 400 |
| Welding Current (A) | 70–110 | 100–140 | 140–180 | 190–240 |