ThePipingMart Blog Grades Monel K-500 (UNS N05500) – Composition, Properties, & Uses

Monel K-500 (UNS N05500) – Composition, Properties, & Uses

What is Monel k500

What is Monel K500?

Monel K500 is an alloy composed of Nickel and Copper with additional amounts of Iron, Manganese, and Aluminum that provides superior corrosion resistance and excellent strength at elevated temperatures. Its low coefficient of thermal expansion makes it ideal for precision parts. At the same time, its outstanding fatigue resistance allows it to outperform other materials under repeated loading cycles or stress fatigue conditions. It is perfect for engineers looking for all-around performance from their materials selection process.

What Forms is Monel k500 Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Bolts
  • Sheet Plates

Monel K500 Chemical Composition

Monel 2.4374 consists primarily of Nickel (67%) and Copper (30%) but also contains small amounts of Iron (2%), Manganese (.50%), and Aluminum (.50%). This combination makes it highly corrosion-resistant in fresh and saltwater environments.

Ni Cu Al Ti C Mn Fe S Si
63.0-70.0 Remainder 2.30-3.15 .35-.85 .25 max 1.5 max 2.0 max .01 max .50 max

Alloy K500 Monel Physical Properties

Monel K500 has excellent strength at elevated temperatures, which suits high-temperature applications such as furnace components or boilers. It is also non-magnetic, which makes it suitable for use in electronic components or equipment that may be exposed to electromagnetic fields. Alloy K500’s low coefficient of thermal expansion makes it an ideal choice for precision parts that require a tight tolerance range when exposed to temperature changes.

Properties Metric Imperial
Density 8.45 g/cm³ 0.305 lb/in³
Melting point 1338°C 2440°F

Monel K500 Mechanical Properties

UNS N05500 has excellent tensile strength and flexibility, making it suitable for use in various engineering applications such as pipe fittings or valves where strength is necessary, but flexibility is also needed. It also has outstanding resistance to fatigue, allowing it to perform better than other materials under repeated loading cycles or stress fatigue conditions.

Hardness (HB) Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%)
27-35 HRC 970-1000 690-760 15-20

Alloy K500 Material Properties

K500 Monel is a nickel-copper alloy used for its excellent corrosion resistance in many environments. Its properties make it ideal for chemical processing, marine applications, and specialized fasteners and valves. This material offers high strength and hardness at temperatures up to 1000°F (538°C) with the added benefit of being easy to weld, fabricate, and machine. The monel k500 material can withstand extreme temperatures without losing its corrosion resistance or formability. Additionally, Monel N05500 shows good electrical conductivity and thermal conductivity for applications requiring high performance in extreme climates. The monel k500 material also offers excellent machinability, formability, and ductility, making it an ideal choice for many industries such as aerospace, oil & gas, and electronic components.

Monel K500 Equivalent

  • Monel Alloy K500, Nickel K500 (NA18, N05500)
  • 2.4374
  • 2.4375
  • NA18
  • N05500
  • BS3076
  • ASTM B865
  • AMS 4676
  • NiCu30Al (DE)

Monel K500 Specifications



Metal Type

UNS N05500

Monel k500 Bar

ASTM B865 QQ-N-286

Monel k500 Wire


Monel k500 Sheet

ASTM B865 QQ-N-286

Monel k500 Plate

ASTM B865 QQ-N-286

Monel k500 Fitting

Monel k500 Forging

QQ-N-286 Din 17754

Monel k500 Weld Wire

FM 60 ERNiCu-7

Monel k500 Weld Electrode
FM 190 ENiCu-7 Din 17753

Monel k500 Din


Monel K500 Uses

Monel K500 is an alloy of nickel and copper known for its exceptional strength, corrosion resistance, and temperature endurance. It is thus an ideal material for various uses, including producing valves, pumps, shafts, and fasteners used in desalinization systems, oil refining operations, and other industries where long-lasting and reliable parts are needed. Monel K500 can also withstand high temperatures without losing its strength, making it invaluable on aeroplanes where components must be able to endure temperatures as high as 1200°F. Due to its durability and use in many industries vying for dependable materials, Monel K500 has become a vital component in many product applications.

  • Monel K500 is an alloy of nickel, copper, iron, manganese, carbon, and silicon.
  • Monel K500 is known for its high strength and corrosion resistance.
  • Monel K500 is often used in the chemical industry, as it is resistant to various corrosive chemicals.
  • Monel K500 is also used in the marine industry, as it is resistant to saltwater corrosion.
  • Monel K500 can also be used in high-temperature applications, as it has a higher melting point than other alloys.

Monel K500 Hardness

Monel Alloy K500 is one of the more complex monel alloys. It is well-suited for demanding use in deep-sea infrastructure, gas and oil production systems, pumps, valves, and fasteners. This unique monel alloy features an impressive hardness of up to 54 HRC on the Rockwell C-scale. It has a high dynamic strength allows it to resist dynamic stresses associated with marine hardware and components exposed to saltwater spray. Monel K500 exhibits significant corrosion resistance, which is essential for various environmental conditions. This model alloy’s unique combination of properties means it’s a preferred material for many demanding industrial applications.

Monel K500 Corrosion Resistance

Monel Alloy K500 is exceptionally resistant to corrosion. This makes it ideal for use in applications where corrosion resistance is important, such as in saltwater environments or environments with high levels of acidity or alkalinity. It can also be used for components exposed to high humidity levels or other corrosive elements without fear of damage or degradation over time.

K500 Monel Machinability

Machining Alloy K500 Monel has been a complex challenge for many machinists. This nickel-copper alloy is notoriously difficult to work with due to its high hardness, and even small amounts of impurities can cause headaches while working. Machinists must take great care to use the correct cutting speeds, feeds, and drill bits to avoid sudden tool failures or poor surface finishes. Luckily, some operators have mastered working with Monel K500, allowing them to achieve precise results efficiently and effectively.

Monel N05500 Heat Resistance

Monel K500 has excellent heat resistance properties. It can withstand temperatures up to 1600 degrees Fahrenheit (870 degrees Celsius) without any damage or loss of strength. This makes it perfect for applications where components must be exposed to extremely high temperatures, such as aircraft engines and exhaust systems.

Alloy K500 Thermal Conductivity

Monel K500 has excellent thermal conductivity properties as well. This means it can efficiently transfer heat away from components under extreme stress or strain due to temperature changes or prolonged exposure to intense heat sources. This makes it an ideal material for parts and components subjected to extreme temperatures regularly.

Monel K500 Heat Treatment

Monel K500 can also be heat-treated for further strength and longevity purposes if necessary. Heat treating is a process that involves heating the material to specific temperatures followed by controlled cooling rates until the desired microstructure is achieved. Heat treatment helps improve overall mechanical properties like ductility, hardness, yield strength, etc., making parts more durable and resistant to wear and tear.


In conclusion, Monel®K– 500 is an excellent choice for a strong. Yet, corrosion-resistant material with good thermal conductivity characteristics makes it suitable for many industrial applications ranging from structural components, marine construction, heat exchangers, steam turbines, pumps, valves, etc. The material can easily be machined, allowing for complex shapes while maintaining tight tolerances; however, caution must still be taken during these processes since some conditions may lead to embrittlement if not monitored closely. Welding requires special precautions, but with proper monitoring post-weld treatments, any potential risks can easily be avoided while still providing reliable service life over extended periods without any issues arising from improper handling or fabrication practices. Whether you are looking for a strong yet lightweight metal with superior corrosion resistance capabilities or need something that will stand up against harsh environments, then Monel®K– 500 should make your shortlist of materials considered regardless of what type of application you have planned!

Related Post