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

Monel K500 Flanges – Composition, Properties and Uses

Monel K500 Flanges - Composition Properties And Uses

Monel K500 Flanges are widely used in various industries, including marine, chemical, and petrochemical. They are made from a nickel-copper alloy with excellent corrosion resistance, high strength, and durability. This blog post will delve into the composition, physical and mechanical properties, heat treatment, and corrosion resistance of Monel K-500 Spectacle Blind Flanges. If you want to know more about this material and its many applications, read on!

What are Monel K500 Flanges?

Monel K500 Blind Flanges are fittings used to join two pieces of pipe together. They overlap the ends of the connecting pipes and keep them in place, allowing for easy access and maintenance when needed. These flanges are typically crafted from a nickel-copper alloy known as Monel K500, which provides excellent corrosion resistance when exposed to seawater or other forms of moisture. In addition, they offer great strength and durability due to their hard steel core material.

Composition of Monel K500 Flanges

UNS N05500 Flanges is a nickel-copper alloy that contains small amounts of aluminium, titanium, and other elements. The material’s composition gives it superior strength and resistance to corrosion, even in harsh environments. The high nickel content (63%) ensures Monel K500 Long weld Neck Flanges are resistant to seawater and other corrosive media. Furthermore, adding copper (28%) enhances the material’s strength and durability.

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

Physical Properties of Monel K500 Flanges

Monel K-500 Socket Weld Flanges  possess excellent physical properties. They have a density of 8.4 g/cm3, a melting point of 1315-1357°C, and a boiling point of 1350-1400°C. Their thermal conductivity is 22.8 W/m-K at 100°C, and their specific heat capacity is 418 J/kg-K. Monel K500 Flanges are also non-magnetic and have a low coefficient of thermal expansion, making them suitable for cryogenic applications.

Mechanical Properties of Monel K500 Flanges

Monel K500 Ring Joint Type Flanges  exhibit high tensile strength and toughness. They have a yield strength of 240 MPa, an ultimate tensile strength of 690 MPa, and a hardness of 98 HRB. These properties make Monel K500 Flanges suitable for high-pressure and high-temperature environments.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Monel K500 8.44 g/cm3 1350 °C (2460 °F) Psi – 160000 , MPa – 1100 Psi – 115000 , MPa – 790 20 %

Monel K500 Flanges Equivalent

Monel K500 2.4375 N05500

Uses of Monel K500 Flanges

Monel K500 Threaded Flanges have many applications across various industries. Their resistance to corrosion makes them ideal for use in marine environments, such as offshore platforms, shipbuilding, and underwater pipelines. They are also used in the chemical and petrochemical industries for pumps, valves, and fittings. Additionally, Monel K500 Flanges are used in the aerospace industry for components that require high strength and resistance to corrosion and wear.

Heat Treatment of Monel K500 Flanges

Alloy K500 Flanges can be heat-treated to enhance their physical and mechanical properties. The heat treatment process involves annealing, hardening, and stress relieving. Annealing involves heating the material to a specific temperature, holding it there for a certain period, and then cooling it slowly to soften it. Hardening involves heating the material to a high temperature and quenching it in water to make it harder. Stress relieving is carried out to remove internal stresses that can cause the material to deform or crack when used under pressure.

Corrosion Resistance of Monel K500 Flanges

UNS N05500 Flanges are highly corrosion-resistant in various media, including seawater, sulfuric acid, and hydrofluoric acid. They are also resistant to stress corrosion cracking and erosion-corrosion. Their corrosion resistance makes them ideal for harsh environments where other materials would quickly deteriorate.


Monel K500 Blind Flanges are an excellent choice for applications that require high strength and resistance to corrosion, impact, and wear. Their unique composition, physical and mechanical properties, and heat treatment options make them versatile and highly sought after. This blog post has provided valuable insights into the composition, properties, and uses of Monel K500 Flanges. If you’re considering using this material for your next project, check out our range of Monel K500 Flanges.

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