ThePipingMart Blog Products Monel K500 Pipes – Composition, Properties and Uses

Monel K500 Pipes – Composition, Properties and Uses

Monel K500 Flanges - Composition Properties And Uses

Monel K500 is a high-strength nickel alloy with exceptional performance in harsh environments. It is a reliable choice for corrosion, erosion, and high-temperature resistance applications. The alloy comprises nickel, copper, and small amounts of other elements such as iron, manganese, silicon, and aluminum. This article will explore the composition, physical and mechanical properties used, heat treatment, and corrosion resistance of Monel K500 pipes.

What are Monel K500 Pipes?

Monel K500 Pipes are nickel-copper alloy pipes that are highly corrosion-resistant, even in seawater. They possess good strength and hardness at elevated temperatures and have excellent weldability. Alloy K500 has added aluminium and titanium for increased strength without sacrificing flexibility, making it a great choice for many industrial applications like refrigeration systems, gas turbines, structural components etc.

Monel K500 Pipe Composition

Alloy K-500 Pipe is a nickel-copper alloy with small additions of aluminium and titanium, which enhances its strength and hardness. The alloy K500 has a chemical composition of 63% Nickel, 30% Copper, 3% Aluminum, and 2.5% Titanium. The alloy can resist various chemical environments, especially sulfuric acid and seawater.

Grade Monel K500
Ni 63.0 min
C 0.25 max
Al 2.3 – 3.15
Mn 1.5 max
Si 0.5 max
Fe 0.5 – 2
Cu 27.0 – 33.0
S 0.010 max
Ti 0.35 – 0.85

Monel K500 Pipe Physical Properties

K500 Pipes are well-known for their high strength, toughness, and excellent resistance to corrosion and erosion. The alloy has a density of 8.44 g/cm3 and a melting point of 1315°C. Its thermal conductivity is 19.2 W/mK, and its electrical resistivity is 0.000089 ohm-meters.

Monel K500 Pipes Mechanical Properties

Monel K500 EFW Pipe is a high-strength alloy with excellent mechanical properties even at high temperatures. Its ultimate tensile strength reaches up to 1100 MPa, with a yield strength of 790 MPa. It has a Rockwell hardness range of 60-80 B. Monel K500 pipes meet the requirements of numerous specifications and international standards.

Element Monel K500
Density 8.44 g/cm3
Melting Point 1350 °C (2460 °F)
Yield Strength 0.2% Proof (MPa) min Psi – 1,15,000 , MPa – 790
Tensile Strength Psi – 1,60,000 , MPa – 1100
Elongation 20%

Monel K500 Pipes Equivalent

Monel K500 2.4375 N05500

Monel K500 Pipes Uses

 Alloy K-500 pipes are used in various demanding applications, including marine and offshore structures, chemical processing, oil and gas, pumps and valves, and electronic components. It is also used in manufacturing springs and the aircraft industry for turbine blades and other critical applications.

Monel K500 Pipes Heat Treatment

Monel K500 Seamless Pipes can be enhanced by heat treatment. The alloy can be annealed at 870°C to 910°C for several hours, followed by cooling in air. The annealing process enhances the corrosion resistance and flexibility of the alloy. The alloy can also be hardened through cold working.

Monel K500 Pipes Corrosion Resistance

Monel K500 Welded Pipes has excellent resistance to corrosion from a wide range of environments, including seawater, sulfuric acid, hydrofluoric acid, and alkalis. The alloy is less susceptible to stress corrosion cracking than Monel 400. It has excellent strength and resistance to corrosion in sour gas environments.


Monel K500 Welded Pipes have excellent physical and mechanical properties, high resistance to corrosion and erosion, and are widely used in demanding applications. The alloy is used in various industries, including marine, chemical processing, oil and gas, and electronic components. Heat treatment enhances the alloy’s corrosion resistance and flexibility, while the alloy’s composition makes it less susceptible to stress corrosion cracking. Monel K500 Seamless Pipes are reliable for projects requiring high strength and corrosion resistance.

Related Post