Features of E9018 G Low Temperature Steel Welding Rod
The E9018 G can be welded in all positions and has good welding performance.
The deposited metal has been well purified and refined, which has good FAC resistance and high impact toughness.
Chemical Composition of E9018 G Low Temperature Steel Welding Rod
| Chemical components of deposited metal (%) |
| Test item | C | Mn | Si | S | P | Cr | Ni | Mo |
| Example value | 0.058 | 1.36 | 0.22 | 0.005 | 0.01 | 0.24 | 0.94 | 0.4 |
| Mechanical properties of deposited metal (570℃×2h heat treatment) |
| Test item | Rm(MPa) | ReL/Rp0.2(MPa) | A(%) | KV2(J)-20℃ |
| Example value | 690 | 610 | 24 | 95 |
| Reference current (DC+) |
| Welding electrode diameter (mm) | Φ3.2 | Φ4.0 | Φ5.0 |
| Welding current (A) | 90-120 | 140-180 | 170-210 |
E9018-G Welding Rod FAQ (Technical Insights for Engineers)
What is the AWS classification for E9018-G, and how does it compare to other low-alloy rods?
E9018-G belongs to the AWS A5.5 specification for low-alloy steel electrodes. The "E90" indicates a minimum tensile strength of 90 ksi, "1" means all-position welding, and "8" specifies the low-hydrogen sodium coating. The "G" denotes a general low-alloy classification. If your project requires different low-alloy properties, such as resistance to atmospheric corrosion, you might want to look into the corrosion-resistant steel welding rod ER7016-G which offers tailored chemical characteristics for weathering steels.
Why is E9018-G preferred for WB36 steel welding in power plants?
WB36 (15NiCuMoNb5-6-4) is a high-strength steel widely used in high-pressure feedwater lines. E9018-G provides an exact mechanical strength match and delivers exceptional Flow-Accelerated Corrosion (FAC) resistance. For heavy-duty industrial welding applications like this, selecting the right companion tools is crucial; for instance, high-precision automated or manual setups often utilize premium lanthanum tungsten electrodes to ensure arc stability in critical root passes.
What are the preheating and baking requirements for E9018-G electrodes to prevent cracking?
To maintain its ultra-low-hydrogen properties and eliminate the risk of hydrogen-induced cold cracking, E9018-G electrodes must be baked at 350°C to 400°C for 1–2 hours before welding. If your application involves surfaces that also suffer from extreme abrasive wear alongside thermal stress, implementing a buffer layer with a hardfacing welding rod after the main structural weld can significantly extend the overall service life of the components.
