ThePipingMart Blog Welding Electrodes AWS Class ENiCrFe-3 Welding Electrode – Composition, Properties, and Uses

AWS Class ENiCrFe-3 Welding Electrode – Composition, Properties, and Uses

AWS Class ENiCrFe-3

The world of welding can seem daunting and confusing at first glance, with numerous technical terms and materials. AWS Class ENiCrFe-3 is a material used extensively in the welding industry. But what is it exactly? In this blog, we’ll dive deep into the various aspects of AWS Class ENiCrFe-3, including composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance. Let’s get started!

What is AWS Class ENiCrFe-3 ?

AWS Class ENiCrFe-3 Welding Electrode is an alloy steel wire used for welding dissimilar metals, particularly in the repair of high-temperature components. It has excellent strength and toughness at elevated temperatures, good wear resistance and superior arc stability. The main advantages of using AWS Class ENiCrFe-3 welding alloy  are that it can provide impact toughness down to -50°C, work hardening allows heavy gauge sections to be welded without preheating, and it has very little distortion or shrinkage due to its low carbon content. Furthermore, the weld deposit is resistant to cracking even when exposed to thermal shocks, such as rapid cooling after welding or quenching. This makes AWS Class ENiCrFe-3 an ideal choice for welding component repairs subject to extreme temperatures or conditions.

ENiCrFe-3 Weld Wire Composition

ENiCrFe-3 welding coated electrode is a nickel-based electrode mainly used for welding various grades of nickel-chromium-iron alloys to each other and welding these alloys to carbon steel. Its chemical composition includes 59% Ni, 19% Cr, 3.2% Fe, and a maximum of 0.1% carbon and 0.1% si.

C Mn Fe P S Si Cu Ni Ti Cr Nb+Ta Other
0.10 5.0-9.5 10.00 0.03 0.015 1.0 0.50 59.0 1.0 13.0-17.0 1.0-2.5 0.50

ENiCrFe-3 Filler Metal Physical Properties

AWS Class ENiCrFe-3 coated electrode has good corrosion resistance due to its high nickel content and provides excellent mechanical properties, such as high tensile strength, fatigue resistance, and good flexibility. It has a melting point range of 1300-1350°C and a density of 8.3 g/cm³.

ENiCrFe-3 Welding Electrode Mechanical Properties

The mechanical properties of AWS Class ENiCrFe-3 welding alloy are impressive. It has a tensile strength of 758 MPa, yield strength of 512 MPa, and an elongation of 37%. Its toughness is also noteworthy, with a Charpy V-notch impact strength of >70 J/cm² at -196°C.

Tensile Strength 85,000 psi
Yield Strength 54,000 psi
Elongation 35%

ENiCrFe-3 Welding Electrode Trade Names

Class UNS Oxford Alloys Special Metals BOHLER UTP ESAB SANDVIK
ENiCrFe-3 W86182 Alloy 182 INCONEL WELDING ELECTRODE 182 THERMANIT NICRO 182 UTP 068HH /td> OK NICRFE-3 SANICRO 72HP / EXATON NI 71

ENiCrFe-3 Welding Alloy 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

ENiCrFe-3 Weld Wire Uses

ENiCrFe-3 weld wire is mainly used in the chemical processing, refinery, and petrochemical industries. It is used for welding heat-resistant nickel, chromium, and iron alloys. Due to its excellent corrosion resistance, it is also used in offshore platforms, heat exchangers, and acid tanks.

ENiCrFe-3 Welding Electrode Heat Treatment

The AWS Class ENiCrFe-3 coated Electrode can be used in the as-welded condition but heat-treated if necessary. Heat treatment generally involves annealing or solutionizing at 1000-1200°C for a few hours, followed by slow cooling in air, water, or oil. The heat treatment enhances the material’s mechanical properties.

ENiCrFe-3 Coated Electrode Corrosion Resistant

AWS Class ENiCrFe-3 filler metal electrode has excellent corrosion resistance to various corrosive environments, including acidic, alkaline, and chloride solutions. It is also resistant to stress corrosion, cracking, and pitting. As a result, it is commonly used in industrial applications where corrosion resistance is essential.

Conclusion

In conclusion, AWS Class ENiCrFe-3 welding alloy is a nickel-based electrode primarily used for welding nickel-chromium-iron alloys and carbon steel. It has excellent mechanical and physical properties and is widely preferred in the chemical processing, refinery, and petrochemical industries. Heat treatment can enhance its mechanical properties and has impressive corrosion resistance to several corrosive environments. We hope this blog has given you deep insights into the AWS Class ENiCrFe-3 and its various properties and uses.

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