E7018 Low-Hydrogen Electrode
Iron-powder low-hydrogen carbon-steel covered electrode, the workhorse for sound welds.
Material overview
The Structural Steel Welding Consumables catalog describes E7018 Low-Hydrogen Electrode as follows: Iron-powder low-hydrogen carbon-steel covered electrode, the workhorse for sound welds. Reviewers should evaluate Low diffusible hydrogen, smooth ripple, X-ray quality, and resists cracking on thick/carbon steel. The grade record lists Pressure vessels, pipes, structural and bridge steel, heavy fabrication, and high-carbon steel among typical applications. The dataset currently includes 10 property records covering chemical composition and mechanical properties. Standards and form records reference A5.1 and GB/T 983 and Covered Electrode. Final supply conditions remain subject to specification, inspection, and export-control review.
Key characteristics
- Low diffusible hydrogen
- smooth ripple
- X-ray quality
- resists cracking on thick/carbon steel
Typical applications
- Pressure vessels
- pipes
- structural and bridge steel
- heavy fabrication
- high-carbon steel
Grade names and equivalents
Technical properties
Typical values are for reference only. Final chemistry, mechanical properties, heat treatment, dimensions, inspection, and documentation are confirmed against the applicable specification and MTC/COA before order acceptance.
Chemical composition
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| C | 0.05-0.1 | wt% | Typical value |
| Mn | 0.8-1.4 | wt% | Typical value |
| Si | 0.4-0.7 | wt% | Typical value |
| P | 0.03 max | wt% | Typical value |
| S | 0.03 max | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Tensile strength | min 490 | MPa | As welded |
| Yield strength 0.2% | min 400 | MPa | As welded |
| Elongation | min 22 | % | As welded |
| Charpy V-notch | min 27 @ -30 C | J | -30 C |
| Diffusible hydrogen | H4/H8 | mL/100g | Typical |
Standards and specifications
Forms, applications, and capabilities
Product forms
- Product form
Industries
- Industry
- Industry
- Industry