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Monel K500 Fasteners – Composition Properties and Uses

Monel K500 Fasteners

When it comes to fastening materials, choosing the right one is crucial for maintaining the integrity and safety of your project. UNS N05500 Bolts is a high-performance nickel alloy often used in applications requiring exceptional strength, corrosion resistance, and durability. In this expert guide, we’ll dive into the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of Monel K500 fasteners.


What is Monel K500 Fasteners?

Monel K500 Bolts and Nuts is a nickel alloy fastener composed primarily of nickel and copper. It also contains iron, manganese, carbon, and silicon for superior strength over other metal alloys. This stainless steel-like alloy is ideal for marine environments due to its excellent corrosion resistance. Its high strength characteristics make it well-suited for various applications, including chemical plants, oil refineries, and power plants.

Monel K500 Fasteners Composition

Monel K500 is a nickel-copper alloy with additional elements such as aluminium and titanium, enhancing its strength and corrosion resistance. The alloy also features small amounts of carbon, manganese, and iron. The chemical composition of K500 Monel Alloy allows it to withstand extreme environments, including seawater, acids, and alkalis.

Element Content (%)
Nickel, Ni 66
Copper, Cu 29
Aluminum, Al 2.7
Iron, Fe 1
Manganese, Mn 0.7
Tungsten, W 0.6
Silicon, Si 0.25
Carbon, C 0.1
Sulfur, S 0.01

Monel K500 Fasteners Physical Properties

Nickel Alloy K500 Hex Bolt exhibits excellent physical properties that make it suitable for applications in challenging environments. The alloy has a density of 8.44 g/cm3 and a melting point of 1315°C, higher than most nickel alloys. It also has a high thermal conductivity that can dissipate heat more effectively than other materials. Moreover, the material is non-magnetic and has a low coefficient of thermal expansion.

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

Monel K500 Fasteners Mechanical Properties

The mechanical properties of the Monel K500 Bolts and Nuts are equally impressive. The material has a tensile strength of up to 1100 MPa, higher than many stainless steel alloys. It also has excellent fatigue resistance, making it ideal for heavy-duty applications that require repeated stress cycles. Monel K500 fasteners have a high yield strength, which means they can withstand large loads without undergoing permanent deformation.

Properties Metric Imperial
Tensile strength 1000 MPa 145000 psi
Yield strength (at strain 0.200%) 655 MPa 95000 psi
Elongation at break 22% 22%
Reduction of area 40% 40%
Hardness, Rockwell C 27 27

Monel K500 Fasteners Equivalent

  • AMS 4676
  • ASTM F467
  • ASTM F468
  • DIN 2.4375
  • MIL N-24549
  • QQ N286

Monel K500 Fasteners Uses

Because of its exceptional properties, UNS N05500 Bolts is widely used in various industries, including marine, chemical processing, oil and gas, and aerospace. In the marine industry, it is used for propeller shafts, pump shafts, and seawater valves. It is used for chemical process equipment, heat exchangers, and valve components in the chemical industry. In the oil and gas industry, it is used for downhole tools, wireline tools, and fasteners. The aerospace industry uses it for engine parts, landing gears, and structural components.

Monel K500 Fasteners Heat Treatment

Heat treatment is an essential process that can enhance the mechanical properties of UNS N05500 Fasteners. The alloy can be annealed at 980°C and then quenched in water or oil to improve its flexibility and toughness. The material can also be aged between 480°C and 650°C to increase strength and hardness. The heat treatment process will depend on the desired properties and the application of the material.

Monel K500 Fasteners Corrosion Resistance

One of the main advantages of Nickel Alloy K500 Hex Bolt is its superior corrosion resistance. The material is highly resistant to pitting, crevice corrosion, and stress corrosion cracking in chloride environments. It is also resistant to sulphuric acid, hydrochloric acid, and phosphoric acid, making it suitable for chemical processing equipment use. Monel K500 ASTM F467 Screws  can withstand harsh environments, making the material an excellent choice for corrosive environments.


Choosing the right fastener material is crucial for ensuring the longevity and safety of your project. Alloy K500 Studs is a high-performance alloy with exceptional strength, durability, and corrosion resistance. The material is widely used in various industries, and its unique properties make it an excellent choice for applications in extreme environments. By understanding the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of K500 Monel Hex Head Bolt, you can make an informed decision and select the best material for your project.

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