ThePipingMart Blog Welding Electrodes AWS Class E8018-B8 Coated Electrodes – Composition, Properties, and Uses

AWS Class E8018-B8 Coated Electrodes – Composition, Properties, and Uses

AWS Class E8018-B8 Coated Electrodes

Choosing the right electrode can make all the difference in welding. Are you looking for an electrode that can provide high-strength welds in various positions and situations? Have you heard about AWS Class E8018-B8 coated electrodes but don’t understand what they are or their benefits? This blog post aims to provide you with all the essential information you need to know about AWS Class E8018-B8 Coated Electrodes. We’ll cover their composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance to help you make an informed choice for your welding needs.

What are AWS Class E8018-B8 Coated Electrodes?

AWS E8018-B8 is a low-hydrogen stick electrode designed for arc welding of carbon and low alloy steels. This electrode has an iron powder-type coating with a layer of active flux, which generates a slag that provides superior protection from atmospheric contamination during welding. The low-hydrogen content also helps reduce the risk of hydrogen embrittlement in high-strength steel welds. It produces stable, spatter-free arcs and excellent post-weld mechanical properties even with higher current applications. Its deep penetration characteristics offer improved fatigue life due to increased ductility and minimal residual stresses while providing excellent operability on AC or DC+ (reverse polarity) welding machines.

AWS Class E8018-B8 coated electrodes are low hydrogen electrodes with high strength and flexibility. They are designed for welding various types of steel, including high-strength low-alloy steel, low-alloy steel, and carbon-manganese steel. These electrodes are coated with rutile, iron powder, cellulose, and low hydrogen coating. The AWS Class E8018-B8 coated electrode has an iron powder mixture that helps maintain a steady arc and improves productivity.

E8018-B8 Welding Electrodes Composition

Composition-wise, AWS Class E8018-B8 electrodes have a ferritic–austenitic stainless steel core wire and a low-hydrogen coating containing high moisture levels. Therefore, storing them in a dry environment before welding is essential to avoid hydrogen absorption, which can lead to porosity and other defects in the welding joint.

AWS Spec

Weld Metal Analysis (%)

Carbon (C)

0.05-0.10 0.07

Chromium (Cr)

8.00-10.50 9.07

Manganese (Mn)

1.00 0.75

Molybdenum (Mo)

0.85-1.20 0.88

Nickel (Ni)

0.40 0.08

Phosphorus (P)

0.03 0.013

Silicon (Si)

0.90 0.54

Sulfur (S)

0.03 0.007

E8018-B8 Welding Electrodes Physical Properties

Physical Properties-wise, AWS Class E8018-B8 wire have a diameter of 3.2mm and a length of 350mm. Their tensile strength ranges from 670-785 N/mm², with a yield strength of approximately 600 N/mm² and an elongation rate of 22% at 25°C. These properties make them suitable for welding in various positions, including overhead, flat, vertical, and horizontal.

E8018-B8 Coated Electrodes Mechanical Properties

Mechanical Properties-wise, AWS Class E8018-B8 electrodes are known for their high mechanical properties. Their impact energy value is 60J or more, suitable for impact-loading structures, such as bridges, offshore structures, pressure vessels, and pipelines.

AWS Spec (min) SR 1 HR. @ 1375°F

Ultimate Tensile Strength

80,000 psi (550 MPa) 96,000 psi (663 MPa)

Yield Strength

67,000 psi (460 MPa) 76,000 psi (525 MPa)

Percent Elongation in 2”

19% 25%

E8018-B8 Welding Electrodes Trade Names

Class UNS Oxford Alloys BOHLER
E8018-B8 W50418 Alloy 8018-B8 BOHLER FOX CM 9 KB

E8018-B8 Coated Electrodes Parameters


Type of Current


Amperage Range

Voltage Range


95 70-110 Variable


140 90-160 Variable


190 130-210 Variable

E8018-B8 Coated Electrodes Uses

AWS Class E8018-B8 filler metal are used in welding various materials, including high-strength low-alloy steel (HSLA), low-alloy steels, and carbon-manganese steels. They are suitable for use in various industries such as oil and gas, construction, shipbuilding, and power generation. Since they are low-hydrogen electrodes, they are also suitable for welding in humid or wet conditions.

E8018-B8 Coated Electrodes Heat treatment

Heat treatment is vital in welding, and AWS Class E8018-B8 filler wire need the right heat treatment to achieve optimal performance. After welding, it is essential to anneal, quench, or temper the welded joint to optimize the alloy’s mechanical properties and minimize the risk of failure resulting from thermal stresses.

E8018-B8 Welding Electrodes Corrosion Resistance

Corrosion resistance-wise, AWS Class E8018-B8 coated electrodes exhibit excellent resistance to corrosion, oxidation, and erosion. This makes them suitable for welding structures in harsh environments exposed to seawater, acidic gases, and high temperatures.


In conclusion, AWS Class E8018-B8 coated electrodes offer an excellent welding solution for welding various materials, including high-strength, low-alloy, and carbon-manganese steels. They have high mechanical properties, are suitable for welding in various positions, and exhibit excellent resistance to corrosion, oxidation, and erosion. It is essential to store them in a dry environment before welding, subject them to the right heat treatment, and use them correctly to achieve optimal results. Choose AWS Class E8018-B8 coated electrodes for your next welding project today.

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