Copper Bridge E7018 Low Hydrogen Stick Electrode
DESCRIPTION
Copper Bridge E7018 is a low-hydrogen, iron-powder electrode for carbon and low-alloy steel. It can be used with AC or DC+ for all-position welding, with low spatter, easy slag removal, smooth weld formation, and strong mechanical and crack-resistance properties.
▶ AVAILABLE DIAMETERS
3/32 in, 1/8 in, 5/32 in, 3/16 in
2.5 mm, 3.2 mm, 4.0 mm, 5.0 mm
▶ PACKAGING
1.1 lb, 2.2 lb, 4.4 lb, 5.5 lb, 8.8 lb, 11 lb
▶ APPLICATIONS
Mainly used for welding carbon steel and lowalloy steel for important structures of corresponding strength grades. Widely used in ships, marine engineering, pressure vessels, bridges, and pipelines.
▶ WELDING PROCESS
SMAW / Stick Welding
▶ POLARITY
AC or DC+
▶ WELDING POSITIONS
All position
CHEMICAL COMPOSITION OF DEPOSITED METAL (WT.%)
| Element | C | Mn | Si | P | S |
| AWS / GB-T Requirement | ≤0.15 | ≤1.60 | ≤0.90 | ≤0.035 | ≤0.035 |
| Example value | 0.072 | 1.25 | 0.52 | 0.017 | 0.012 |
MECHANICAL PROPERTIES OF DEPOSITED METAL
| Property | AWS Requirement | Copper Bridge Typical |
| Tensile Strength | ≥490 MPa (71 ksi) | 550 MPa (80 ksi) |
| Yield Strength | ≥400 MPa (58 ksi) | 440 MPa (64 ksi) |
| Elongation | ≥22% | 28% |
| Impact Value (Charpy V-Notch) | ≥27 J at -30°C (-22°F) | 144 J at -30°C (-22°F) |
RECOMMENDED WELDING PARAMETERS
| Diameter | 3/32in(2.4 mm) | 1/8 in(3.2mm) | 5/32in(4.0mm) | 3/16in(5.0mm) |
| Flat /HorizontaI (A) | 70–100 | 100–140 | 140–190 | 190–240 |
| Vertical/Overhead (A) | 60–90 | 90–120 | 120–160 | 160–210 |
NOTES
1. Bake electrodes at 350–400°C (662–752°F) for 1 hour before welding.
2. Remove rust, oil, and moisture from the workpiece before welding.
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