The Difference of E7018 and E7018-1 RH4 Welding Electrode

Among the various welding electrodes available, E7018 and E7018-1 RH4 are two popular choices. While they may seem similar at first glance, there are key differences that make each suitable for specific applications. Let us talk about their difference, so that you can choose according to your needs later!

Composition and Coating:

One of the primary differences between E7018 and E7018-1 RH4 lies in their composition and coating. While both electrodes are low-hydrogen types, E7018-1 RH4 has a specially formulated coating that enhances its resistance to moisture and hydrogen. This results in a more stable arc and improved weld quality, particularly in challenging environments.

Impact Toughness:

E7018-1 RH4 offers superior impact toughness compared to standard E7018 electrodes. This makes it a better choice for applications where the welded structure may be exposed to low temperatures or dynamic loading conditions. The enhanced toughness of E7018-1 RH4 helps maintain the integrity of the weld, reducing the likelihood of fractures or failures.

Applications:

Due to their differences in properties, E7018 and E7018-1 RH4 are suited for different applications. E7018 is widely used in general fabrication, construction, and repair work, where standard strength and ductility are sufficient. In contrast, E7018-1 RH4 is preferred for critical applications, such as in the aerospace, nuclear, and offshore industries, where the consequences of weld failures can be severe.

In summary, while both E7018 and E7018-1 RH4 welding electrodes are designed for high-quality welds, they possess distinct characteristics that make them suitable for different applications.

Any inquiry of welding electrode and welding wire, please feel free to contact ACE Team!