What Is 7018 Welding Rod Used For

What Is 7018 Welding Rod Used For - Popular for its flexibility and versatility the 7018 welding electrode is highly regarded.

This rod is often referred to by the "low-hydrogen" electrode.

It has a moisture outer coating which is extremely useful for creating a strong, crack-resistant weld.

What Is 7018 Welding Rod Used For

The 7018's storage is the most difficult part of the process.

Let's get into the details of the 7018 welding rod, and other information you may not be aware of about it.

E7018 Welding rod features & characteristics

The versatile E7018 welding rod is used frequently for welding low and medium carbon steel.

This electrode is also known as a "low hydrogen" rod.

It has a flux coating that contains very little hydrogen, which allows for a small amount of hydrogen to be absorbed into the weld pool.

The iron-containing flux compound protects the molten weld beads from moisture and contamination.

The low hydrogen content in the weld deposit results is very strong and ductile welds that can withstand approximately 70,000 lbs per square inch.

This electrode is much more user-friendly than the E6011 or E6010.

It generates a stable arc which provides low to moderate penetration while remaining quiet and producing very little spatter.

It is compatible with both AC and DC welders and has a high deposition rate.

It is somewhat heavy but easily removed, leaving behind smooth beads with distinct ripples.

7018 Rod Applications

The 7018, also known as the E7018 welding rod, is a medium-penetration fill-freeze electrode that's used to weld carbon-steel high-tensile materials.

The rod is suitable for welding metals that are difficult to weld.

The low-hydrogen flux coating on the 7018 rods makes the process easier and more efficient for these metals.

Because of its strong weld properties, the E7018 welding rod has been highly valued in structural welding.

It is used to build high-rise buildings, bridges and shopping malls as well as dams and other highly-strengthened structures.

What Is 7018 Welding Rod Used For

E7018 welding tools are simple to use and produce smooth welds.

The E7018, unlike other "fill-freeze” welding rods that use straight or direct polarity AC current, is a reverse polarity or DC+ electrode.

The E7018 has a flux coating that can also be used with alternating or AC current.

The E7018 is often classified as a "low-hydrogen" electrode because of its flux coating.

E7018 is a strong and crack-resistant welding material that has a beautiful finish.

It is widely used in structural welding.

There are also many other common applications:

  • Pipe welding
  • Pressure vessels are welded
  • Boilers for welding
  • Equipment for heavy duty
  • Construction of a ship hull
  • General manufacturing and maintenance labor

What do the numbers mean on a 7018 welding rod?

One of many electrode types that have AWS designation is the E7018 welding rod.

AWS assigns four to five digits following the letter. The AWS assigns two to three digits after the letter to indicate the tensile strength.

This is measured in kpi, or kilo-pounds/square inch.

70: The 70 in E7018 refers to 70,000 psi/70 kpi.

1: The third digit denotes the welding position. No. No. 1 is for all purposes of welding.

8: The number 8 is the last digit.

This indicates the type of coating, penetration and the types or currents that can be used for the electrode.

The "8" indicates low-hydrogen flux with potassium and iron powder compounds for E7018 welding rods.

It also indicates its medium penetration qualities.

This number denotes, in addition, that the electrode operates on reverse polarity DC, DCEP, and AC.

E7018 is an example of an electrode that has additional requirements.

These requirements are indicated by a suffix (e.g., E7018-1). The suffix "-1", which indicates greater toughness or durability; the suffix "-M" is for military requirements; and H4, H8 and H16 indicate diffusible hydrogen limits in milliliters per 100 grams (e.g. H8 = 8 mg/100 grams).

These suffixes can also indicate the presence of a specific alloy in low-alloy steel-coated electro.

Tips for Welding E7018 Welding Rod

It can be difficult to weld with the E7018 electrode.

The E7018 electrode is versatile as it can deposit a large amount of materials to make a strong weld. However, it can also quickly solidify.

These guidelines will help you create the best weld.

Concentrate the heat at the joint by keeping your welding arc tight.

A wider arc will result in a stronger weld.

A wider weld can distort the workpiece or dislodge filler material.

During welding, keep the distance between the tip and the workpiece of the electrodes.

As the welding progresses, the consumable electrode becomes shorter.

Therefore, it is important to maintain the distance between rod and workpiece as soon as the arc has been created.

Keep practicing.

7018 Amperage Settings

The recommended amperage is for each rod size and the thickness of steel that you intend to weld using the 7018 rods.

For precise amp setups, you can refer to the manuals of the rod manufacturers.

If there is no recommendation, you can refer to the rod manufacturer's manuals for setting up accurate amps.

According to general guidelines, current can be increased by up to 30 amps for every 1/32 inch of rod diameter.

You should also consider the steel thickness.

A 3/32 inch diameter rod will require 50 amps for 1/16-inch steel thickness, and approximately 90 amps for 1/8-inch steel thickness.

For larger rods, you will need to increase the amps. You can set the current to 120 amps for a 5/32 inch rod.

This will allow you to weld 1/4-inch steel.

You can use the same diameter 5/32 inch rod to increase the current to 180 for welding 3/8-inch steel.

The current for the 3/16-inch rod is 150 amps. This current can be used to weld the 3/8 inch steel.

The amperage recommendations can vary from manufacturer to manufacturer.

It is best to observe the conditions and results of welding to determine the amp's volume.

The maximum current you can use with 7018 rods is 225 amps.

What if the Current is Too Low?

The amp setting too low will make it difficult to melt the rod or the joint.

During welding, the rod head may stick to the surface of a welding object.

The molten puddle can be defined as a liquid that has penetrated through metal enough to form two pieces.

What if the Current is Too High?

The current should not be too high.

If it is too high, the welding keyhole during the welding process will easily melt the metal, leaving a hole in the steel.

If the current is too high, the welding rod will melt-red.

E7018 Welding Rod Care

It is essential that E7018 be stored in a dry environment.

Moisture can quickly degrade the low-hydrogen flux electrode coating.

The resulting arc will pop and spit if the low-hydrogen flux coating absorbs moisture.

The weld also becomes weaker and more porous.

Specialized rod ovens can be used to protect the E7018 welding rod against moisture.

You can make improvised rod ovens from old refrigerators by adding a high-wattage light inside.

However, this is not recommended.

For rods that have been exposed to moisture for a long time, it is recommended to rebake at 371 to 427 (700-800).

The flux coating on E7018 welding rods must be treated with care.

Long electric arcs can be produced by damaged rod tips.

If the flux coating is damaged, it should be replaced or the entire rod replaced.

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