ThePipingMart Blog Welding Electrodes AWS Class ENi-1 Welding Electrode- Composition, Properties, and Uses

AWS Class ENi-1 Welding Electrode- Composition, Properties, and Uses

AWS Class ENi-1

Choosing the right electrode class is vital when welding to achieve top-notch results. AWS Class ENi-1 is a Nickel-based electrode many welders seek because of its unique properties. This blog post will explore the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of AWS Class ENi-1. So, whether you’re a professional welder or starting, read on and discover how AWS Class ENi-1 can take your welding game to the next level.

What is AWS Class ENi-1 Welding Electrode?

AWS Class ENi-1 welding electrodes are a type of nickel-based, all-position consumable welding electrodes. They give welders excellent toughness and impact properties at low temperatures and superior corrosion resistance in mild and seawater service environments. These coated electrods offer greater metal recovery rates than other stainless steel rods, reduced spatter levels for cleaner welds, improved arc stability with short circuits eliminated from the arc process, and more effortless slag removal after deposition due to their built-in deoxidizers. The ENi-1 electrode provides precision spraying or “sprinkling” arcs with its small bead size for advanced detailing work. It also produces a smooth surface finish that eliminates the need for grinding or polishing steps afterwards, saving time and enhancing productivity.

ENi-1 Coated Electrode Composition

AWS Class ENi-1 is a Nickel-based Welding electrode that contains 99% Nickel as its main component. It is alloyed with small amounts of other elements such as iron, manganese, and silicon. The high Nickel content makes it corrosion and oxidation-resistant, while the other elements improve its strength and toughness.

C Mn Si S Fe Ni+ incidental Cobalt Cu + incidental Silver AL Other
2.0 2.5 4.0 0.03 8.0 85 min 2.5 1.0 1.0

ENi-1 Coated Electrode Physical Properties

AWS Class ENi-1 has a melting point of about 1450°C, making it ideal for high-temperature applications. It has a density of 8.9 g/cm³, which is relatively low compared to other metals. The coated electrode is available in diameters ranging from 3.2mm to 6.4mm.

ENi-1 Welding Electrode Mechanical Properties

AWS Class ENi-1 filler wire has excellent flexibility, which means it can undergo significant deformation without cracking or breaking. This Electrode has a tensile strength of about 400 MPa and a yield strength of 350 MPa. The elongation at break is about 40%, making it ideal for flexible applications.

Tensile Strength 65,000 psi
Yield Strength 58,000 psi
Elongation 25%

ENi-1 Coated Electrode Trade Names

Class UNS Oxford Alloys Special Metals UTP ESAB

ENi-1 Welding Electrode Parameters

Diameter Process Volt Amps (flat) Amps (V/OH)
in (mm)
 3/32  (2.4) SMAW 24-28 70-85 65-75
 1/8  (3.2) SMAW 26-30 85-110 80-90
 5/32  (4.0) SMAW 28-32 110-140 100-120
 3/16  (4.8) SMAW 28-32 120-160 110-130

ENi-1 Welding Electrode Uses

AWS Class ENi-1 coated ,welding electrode is commonly used in weld overlay applications to provide a protective layer on metal substrates. It is also used in welding dissimilar metals such as Nickel, Copper, and Monel alloys. Due to its corrosion resistance properties, it finds application in high-temperature environments such as power plants, chemical plants, and oil refineries.

ENi-1 Welding Electrode Heat Treatment

AWS Class ENi-1 welding alloy is not heat-treatable. Hence it does not require any post-weld heat treatment. However, like most Nickel-based alloys, it is susceptible to embrittlement when exposed to temperatures above 315°C.

ENi-1 Welding Electrode Corrosion Resistance

The high Nickel content in AWS Class ENi-1 makes it extremely resistant to corrosion and oxidation. It is also resistant to many acids, alkalis, and organic solvents, making it ideal for harsh environments.


AWS Class ENi-1 filler metal is an exceptional Nickel-based electrode that offers high corrosion resistance and excellent flexibility and is ideal for high-temperature environments. Its composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance make it a versatile electrode option for welding various metals. Whether you’re a professional welder or just getting started, add AWS Class ENi-1 to your welding arsenal and experience its unique properties first-hand.

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