ThePipingMart Blog Welding Electrodes AWS Class ENiFe-Cl Coated Electrode- Composition, Properties, and Uses

AWS Class ENiFe-Cl Coated Electrode- Composition, Properties, and Uses

AWS Class ENiFe-Cl

AWS Class ENiFe-Cl is a welding electrode with the AWS A5.15 classifications. The electrode comprises nickel, iron, and copper, and it’s also commonly known as ENiFe-Cl. It’s a consumable electrode used in welding to join non-ferrous metals, particularly copper-nickel alloys. This article explores the composition, physical and mechanical properties, heat treatment, corrosion resistance properties, and uses of AWS Class ENiFe-Cl.

What is AWS Class ENiFe-Cl Welding Electrode?

AWS Class ENiFe-Cl welding alloy is a type of metal arc welding process that uses nickel-iron (NiFe) coated electrodes to join steel and cast iron components—this type of welding yields strong, ductile welds with rapid cooling. The NiFe coating on the electrodes creates hydrogen atoms that help reduce the impact of corrosion during the welding and cool faster than other processes. Compared to other electric arc welding processes, the process is relatively simple to use, making it an ideal choice for many industrial applications. Additionally, AWS Class ENiFe-Cl welds have good thermal and electrical conductivity properties, which makes them appropriate for use in various industries.

ENiFe-Cl Welding Rod Composition

AWS Class ENiFe-Cl coated electrode consists of varying nickel, iron, and copper proportions. For instance, the electrode may contain 55% nickel, 40% iron, and 5% copper. The electrode’s composition is designed to provide superior weld characteristics when joining copper-nickel alloys. AWS Class ENiFe-Cl filler metal also contains fluxing agents and titania that help to refine weld pool fusion.

C Mn Si S Fe Ni+ incidental Cobalt Cu + incidental Silver AL Other
2.0 2.5 4.0 0.03 Remainder 45-60 2.5 1.0 1.0

AWS Class ENiFe-Cl Weld Wire Physical Properties

AWS Class ENiFe-Cl is a coated electrode with a rough surface finish. The electrode’s diameter typically ranges from 2.4 mm to 4 mm, with a length of about 350 mm. The wire’s tensile strength is approximately 580 N/mm², and it has an elongation of 40%. The AWS Class ENiFe-Cl coating protects against atmospheric moisture and enhances the electrode’s arc stability.

AWS Class ENiFe-Cl Welding Electrode Mechanical Properties

AWS Class ENiFe-Cl is known for its excellent mechanical properties. It produces a malleable, fine-grained weld metal free from porosity and cracks during welding. The wire has good crack resistance, and the weld metal has high resistance to vibration and shock. The mechanical properties of the AWS Class ENiFe-Cl make it suitable for welding applications in various industries, including marine, petrochemical, and power generation.

Tensile Strength, ksi: 84
Yield Strength, ksi: 59
Elongation in 2”%: 8

ENiFe-Cl Coated Electrode Trade Names

Class UNS Oxford Alloys Special Metals BOHLER UTP
ENiFe-Cl W82002 Alloy 55 NI ROD 55 BOHLER THERMANIT NIMO C276 UTP 83 FN

ENiFe-Cl Coated Electrode Parameters

Typical Welding Parameters
Diameter Process Amps Shielding Gas
in (mm)
3/32” 2.4 GMAW 70-90 98% Argon/2% Oxygen
1/8” 3.2 GMAW 100-135 98% Argon/2% Oxygen
5/32” 4 GMAW 130-180 98% Argon/2% Oxygen
3/16” 4.8 GMAW 190-220 98% Argon/2% Oxygen

ENiFe-Cl Coated Electrode Uses

AWS Class ENiFe-Cl is commonly used in the shipbuilding and offshore industries. It’s used for welding copper-nickel alloys on hulls, piping systems, and other marine components. The electrode can also be used for welding heat exchangers, condenser tubes, and distillation columns in petrochemical plants. AWS Class ENiFe-Cl can also be used in the power generation industry for welding moisture-resistant steam turbine components.

ENiFe-Cl Coated Electrode Heat Treatment

AWS Class ENiFe-Cl requires no preheating before welding, even when working with thicker metals. However, post-weld heat treatment may be necessary for some applications. The heat treatment process involves heating the weld to a temperature range of 450°C to 650°C and holding it for a specific duration. The process helps to relieve residual stresses in the weld and improve its mechanical properties.

ENiFe-Cl Coated Electrode Corrosion Resistance

AWS Class ENiFe-Cl provides excellent corrosion resistance when welding copper-nickel alloys. The electrode produces a weld resistant to corrosion from seawater, brine, and other saline fluids. It’s also resistant to stress corrosion cracking, making it suitable for welding marine components and other structures exposed to aggressive environments.

Conclusion

AWS Class ENiFe-Cl is a versatile welding electrode for joining copper-nickel alloys. The electrode’s composition, physical and mechanical properties, heat treatment, and corrosion resistance properties make it suitable for various welding applications in the shipbuilding, petrochemical, and power generation industries. AWS Class ENiFe-Cl is known for producing high-quality welds, free from porosity and cracks, and it provides excellent resistance to corrosion and stress corrosion cracking. Whether you’re working on marine structures or petrochemical plants, AWS Class ENiFe-Cl is an excellent choice.

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