TOKO AWS A5.1 E7018 welding electrode is very popular for its versatility and flexibility on various types of welding purposes. This rod is always referred to as the “low-hydrogen electrode” with the moisture outer coating that is very useful to create a strong crack-resistant weld. However, the only tricky thing when working with the E7018 is its storage. So, let’s dive right into more details about the E7018 welding rod and other things that you might not know about this rod.

Characteristics of E7018 Rod

The E7018 is a versatile welding rod, frequently used for low and medium carbon steel welding. Also referred to as a “low-hydrogen” rod, this electrode has a flux coating with a very low hydrogen content, allowing a minimal amount of hydrogen into the weld puddle. The molten weld beads are protected from contamination, moisture, and hydrogen in the atmosphere by the iron-containing powder of the flux compound. Consequently, the low hydrogen quantity reaching the weld deposit results in very ductile and robust welds with x-ray quality, withstanding about 70,000 Ibs. Per square inch. 

This is a user-friendly electrode (much more so than, for example, the E6011 and E6010), generating a stable arc that provides low to medium penetration while remaining quiet and producing minimal amounts of spatter. Moreover, it offers a high deposition rate and efficiency, is suitable for all welding positions and is compatible with AC as well as DC welders. The slag is slightly heavy yet easily removable, leaving behind a finish consisting of smooth beads with distinct ripples. 

AWS A5.1 E7018 Appplications:

The E7018 or officially “the E7018 welding rod” is a medium-penetration “fill-freeze” electrode designed to weld high-tensile carbon-steel materials. 

It is very suitable to use on the metals that are very difficult to be welded as the low-hydrogen flux coating that been coated on the 7018 rods is designed to make the welding process more smoothly and effectively for those hard-to-work metals. The E7018 welding rod is highly regarded especially in structural welding due to its robust weld qualities and is commonly used in the construction of high-rise buildings, bridges, shopping malls, dams, and other highly-strengthened structures. Moreover, E7018 welding rods are easy to use with smooth weld results. 

Unlike most “fill-freeze” welding rods that use direct or straight polarity DC current, the E7018 is identified as a reverse polarity DC or DC+ electrode. However, the E7018 possesses a flux coating that is designed to work with AC or alternating current as well. Moreover, the same flux coating often leads to the classification of the E7018 as “low-hydrogen” electrode. 

Due to its strong, crack-resistant welds and its aesthetically pleasing finish, E7018 is perfectly suitable and widely used for structural welding. Other common areas of application are:

-Pipe welding; -Welding of pressure vessels; -Welding boilers; -Heavy-duty equipment; -Ship hull construction; -General manufacturing and maintenance labor

How to Weld E7018 welding rods:

Welding with E7018 electrode can be tricky. The E7018 is a very versatile electrode as it deposits a significant amount of materials to create a very strong weld, but it can quickly solidify as well. In order to create an optimum weld, you should follow these guidelines: 

Keep your welding arc tight and concentrate the heat at the weld joint. Wider arc results in a wider weld. The wider weld may distort the workpiece and dislodge the filler material where it’s not needed.

Keep the distance between the tip of the electrodes and the workpiece during the welding process. The consumable electrode gets shorter as the welding progresses and thus the distance between the rod and workpiece should be maintained soon after the arc was created.

Keep practicing. As the old adage states, “practice makes perfect.” A lot of practice builds welding skill and confidence.

  • AWS A5.1 E7018 Chemical Compositions (%)

               
    C Mn Si S P Cr Ni Mo Balance
    0.068 1.38 0.40 0.013 0.015 0.011 0.035 0.001 ---

    AWS A5.1 E7018 Mechanical Properties

       
    Yield Strength (MPa) Tensile Strength (MPa) Elongation(%)  Akv (J/℃)
    465 560 30 130J / -30

 

Electrode Diameter (MM)

Electrode Length (MM) AMP Range (A)
2.5 300 / 350 70 ~ 110
3.2 350 100 ~ 140
4.0 400 140 ~ 180
5.0 400 190 ~ 240

 

The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and TOKO Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and Test results for mechanical properties, deposit or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.