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HASTELLOY® 622 Welding Wire – Composition, Properties, and Uses

HASTELLOY® 622 Welding Wire

Welding is essential in various industries, such as aerospace, petrochemicals, and energy. High-performance wires have become critical in welding operations requiring corrosion resistance, strength, and durability. One welding wire has gained significant prominence in these applications is HASTELLOY® 622 welding wire. This blog will explore the composition, physical and mechanical properties, uses, corrosion resistance, and heat treatment of HASTELLOY® 622 welding wire.

What is HASTELLOY® 622 Welding Wire?

HASTELLOY® 622 Welding Wire is a high-performance welding wire that offers superior corrosion resistance and toughness for applications in aggressive, moderately oxidizing environments. It has excellent mechanical properties at elevated and lower temperatures due to its austenitic nickel-base superalloy composition. This all-position welding wire can join Hastelloy 622 components and other ferritic stainless steels and austenitic 300 series stainless steel sheets. It also provides good weldability, superior toughness in the welded zone, and minimal base material dilution.

HASTELLOY® 622 Coated Wire Composition

HASTELLOY® 622 welding wire is a high-performance alloy of nickel, chromium, molybdenum, and small quantities of tungsten and cobalt. The nickel component provides excellent corrosion resistance, while the chromium and molybdenum content offers strength and durability. Concerning cobalt enhances wear resistance and provides stability during high-temperature operations. The tungsten component improves the wire’s weldability, making it suitable for various welding processes.

Nickel: Balance
Chromium: 22.1-22.5
Molybdenum: 14.0-14.5
Tungsten: 3.25-3.5
Cobalt: 2.50 max.
Copper: 0.50 max.
Manganese: 0.50 max.
Other: 0.50 max.
Vanadium: 0.35 max.
Silicon: 0.08 max.
Phosphorus: 0.02 max.
Carbon: 0.015 max.
Sulfur: 0.010 max.

HASTELLOY® 622 Welding Wire Mechanical Properties

The mechanical properties of HASTELLOY® 622 alloy are impressive. The ultimate tensile strength is around 115 ksi, higher than stainless steel. The yield strength is around 62 ksi, and the elongation is around 45%. These properties make the wire suitable for welding applications that require high strength, resistance to stress-corrosion cracking, and exceptional creep resistance.

Tensile Strength (psi) 115,000
Tensile Strength (MPa) 793
Elongation (%) 40

HASTELLOY® 622 Coated Wire Physical Properties.

Apart from the mechanical properties, HASTELLOY® 622 welding electrode has excellent physical properties. The density is 8.65 g/cm³, and the melting point is around 1330°C. The wire has a thermal conductivity of 12.9 W/m-K and a specific heat of 448 J/kg-K. These properties make HASTELLOY® 622 welding wire suitable for high-temperature applications requiring durability and reliability.

HASTELLOY® 622 Welding Wire Trade Names

Class UNS Haynes
ERNiCrMo-10 N06022 HASTELLOY® 622

HASTELLOY® 622 Coated Wire Uses

The uses of HASTELLOY® 622 wire are widespread in various industries. One of the most common uses is in the aerospace industry in welding components such as turbine blades, heat exchangers, and combustion chambers. The wire is used in welding applications such as drilling rigs and pipelines in the oil and gas industry. The wire is also used in chemical processing plants, marine applications, and power generation plants.

HASTELLOY® 622 Welding Wire Corrosion Resistance

Furthermore, HASTELLOY® 622 filler metal has excellent corrosion resistance properties. The wire is resistant to crevice corrosion, pitting, stress corrosion cracking, and intergranular corrosion. It is particularly useful in applications with high exposure to corrosive environments, such as seawater and acid plants.

HASTELLOY® 622 Coated Wire Heat Treatment

Finally, heat treatment is critical in enhancing the properties of HASTELLOY® 622 filler wire. The wire can be annealed at high temperatures between 1125 – 1205 °C for two hours to enhance its weldability. The wire can also be solution-treated at 1175 °C, followed by quenching in water or air.

Conclusion

In conclusion, HASTELLOY® 622 welding wire is a high-performance alloy with excellent physical and mechanical properties, corrosion resistance, and weldability. The composition of nickel, chromium, molybdenum, tungsten, and cobalt enhances the wire’s strength, durability and makes it suitable for various welding applications. The wire’s uses are widespread in aerospace, oil and gas, and chemical processing industries. In addition, heat treatment is critical in enhancing the wire’s properties. HASTELLOY® 622 welding wire is an ideal solution for welding applications requiring high temperatures, wear, and corrosion resistance.

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