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HAYNES® N61 RTW Welding Wire – Composition, Properties, and Uses


High-performance alloys have become critical components in chemical processing, aerospace, power generation, and petrochemicals. There are numerous high-performance alloys, and HAYNES® N61 RTW is one of them. It is an excellent nickel-chromium-molybdenum-tungsten alloy used in high-temperature applications and mild corrosive environments. This blog will explore everything you need to know about HAYNES® N61 RTW.

What is HAYNES® N61 RTW?

HAYNES® N61 RTW MATERIAL filler metal is an advanced, high-performance alloy designed for use in parts and components exposed to the corrosive environments of industrial jet engines. This material is a cobalt-based alloy resistant to hot gases, thermal fatigue, oxidation and creep. It offers superior strength and corrosion resistance at elevated temperatures, making it ideal for applications such as exhaust system components like seals, gaskets, and tubing configurations. The material conforms to specific requirements laid out by ASTM International (formerly American Society for Testing & Materials) standards B30 and B32A.

HAYNES® N61 RTW Welding Wire Composition

HAYNES® N61 RTW filler wire is an austenitic nickel-based alloy with high strength and excellent oxidation resistance at elevated temperatures. The alloy has a chemical composition of about 60% nickel, 21% chromium, 10% molybdenum, and 3% tungsten, among other trace elements like iron, cobalt, and carbon.

Nickel: 93.0 min.
Titanium: 2.0-3.5
Aluminum: 1.5 max.
Manganese: 1.0 max.
Iron: 1.0 max.
Silicon: 0.75 max.
Other: 0.50 max.
Copper: 0.25 max.
Carbon: 0.15 max.
Phosphorus: 0.03 max.
Sulfur: 0.015max.

HAYNES® N61 RTW Coated Wire Mechanical Properties

The alloy’s outstanding mechanical properties include high tensile strength and excellent erosion, corrosion, and wear resistance. It maintains its structural integrity and dimensional stability when subjected to extreme temperatures.

Tensile (psi) 60,000
Mpa 414
Elongation (%) 20

HAYNES® N61 RTW Welding Wire Physical Properties

HAYNES® N61 RTW welding alloy possesses excellent physical properties that suit various applications. These properties include good thermal conductivity, high melting point, and low coefficient of thermal expansion.

HAYNES® N61 RTW Coated Wire Trade Names

Class UNS Haynes
ERNi-1 N02061 HAYNES® N61 RTW

HAYNES® N61 RTW Welding Wire Uses

Due to its excellent properties, numerous industries use HAYNES® N61 RTW electrode. It is used in exhaust systems, gas turbine engines, nozzle guide vanes, and other high-temperature applications. It is also used in petrochemical, chemical processing, and power generation plants.

HAYNES® N61 RTW Coated Wire Corrosion Resistance

HAYNES® N61 RTW welding alloy has excellent corrosion resistance, especially in mildly corrosive environments. It can resist corrosion caused by sulfuric acid, hydrochloric acid, acetic acid, and phosphoric acid. It also has good resistance to stress corrosion cracking.

HAYNES® N61 RTW Welding Wire Heat Treatment

HAYNES® N61 RTW welding wire can be heat-treated to enhance its properties. It can be annealed to improve its ductility, machinability, and weldability. However, using this alloy in temperatures above 980°C is not recommended because it may become brittle.


HAYNES® N61 RTW is an excellent high-performance alloy in various critical applications. Its outstanding mechanical and physical properties make it suitable for chemical processing, petrochemicals, aerospace, and power generation industries. Its excellent corrosion resistance and heat treatment options are ideal for high-temperature and mildly corrosive environments. If you’re looking for a high-performance alloy in your industry, consider HAYNES® N61 RTW.

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