Monel Alloy 502

  • Monel 502 can be hot-worked between 872°C and 1149 °C
  • The alloy is aged in a high-temperature range and cooling within a furnace
  • High resistance to corrosion
  • Excellent weldability
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The Monel 502 is a superalloy that possesses the capability to function well at significantly high temperatures. Not just that, it has been designed to handle the severe form of mechanical stress. The alloy comes with a goof creep & oxidation resistance.

The nickel-copper composition of the alloy allows it to be molded into varying shapes. They can easily be used for solid-solution hardening, precipitation hardening, as well as work hardening to increase the overall strength.

Common Names:

  • AMS 4677
  • Monel 502TM

Executive Standards:

  • AMS 4677
  • N05502
  • QQ-N-286

Chemical Properties:

Nickel (%)63 to 70
Iron (%)2 Maximum
Aluminum (%)2.5 to 3.5
Manganese (%)1.5 Maximum
Silicon (%)0.5 Maximum
Carbon (%)0.1 Maximum
Titanium (%)0.5 Maximum
Sulfur (%)0.01 Maximum
Copper (%)Remainder

Mechanical Properties:

Yield Strength1034 MPa149969 psi
Tensile Strength1158 MPa167954 psi
Poisson’s Ratio0.27 to 0.300.27 to 0.30
Elastic Modulus190 to 210 GPa27557 to 30458 ksi
Reduction of Area53%53%

Mechanical Properties:

Yield StrengthTensile StrengthPoisson’s RatioElastic ModulusElongationHardnessReduction of Area
1034 MPa149969 psi1158 MPa167954 psi0.27 to 0.300.27 to 0.30190 to 210 GPa27557 to 30458 ksi15 percent15 percent33533553 percent53 percent

Physical Properties:

Specific GravityDensitySpecific HeatElectrical ResistivityThermal ConductivityMelting PointMean Co-Efficient of Thermal ExpansionElasticity Tension Modulus
8.390.305 lb/cu.in0.1 Btu/lb/Deg-F370 Microohm-cm1212425 Degrees Fahrenheit7.626

Key Features:

  • Machinability: The alloy can easily be machined in a manner similar to the austenitic stainless steel.
  • Forming: Conventional techniques can be used to form the Monel 502 alloy.
  • Welding: The Monel 502 alloy is easy to weld, and most conventional methods can help get the job done.
  • Heat Treatment: Monel 502 is equally reactive to annealing or heat treatment
  • Forging: This nickel-copper alloy can be forged between the temperatures 1010 °C to 1149 °C. This is followed by water quenching technique.

Product Forms Available:

  • Forging
  • Bar


  • Fasteners
  • Propeller Shafting
  • Pump Shafting
  • Valve components

Possible Alternative Grades:

  • Monel 400: High strength & optimum corrosion resistance make up for this Monel alloy, which is a great Monel 502 alternative.
  • Monel 401: This particular Monel 502 alternative is used for varying electrical applications that are covered under the UNS N04401 standard.
  • Monel 404: With a low curing temperature and low permeability, this Monel 502 alternative is used for capsule transistors or metal-ceramic sealings.
  • Monel 405: A free-machining alloy of the Monel 400, this metal is used primarily for the automatic screw stocks for the machine.

Frequently Asked Questions:

  • What is the difference between Monel and cupronickel?

The prime difference between cupronickel and Monel is the fact that the former houses 60 percent or more copper, while the latter is composed primarily of nickel.

  • Who created the Monel alloy?

The Monel alloy was created in the year 1901 by Robert Crooks Stanley. He worked at the INCO or the International Nickel Company.

  • What are the popular companies that have used Monel?

Answer: Monel has been used by popular companies such as Arrow Fastener Co. Inc., Kelvinator Refrigerators, Baby Alice Thumb Guard, and so on.

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