Monel Alloy grades at a glance with ASTM specification and equivalent chart

Monel refers to a group of nickel alloys characterised by the presence of nickel as the primary component along with copper and other elements. When the copper content surpasses that of nickel, the alloy is termed cupronickel. Typically, Monel consists of 52 to 67% nickel, rendering it stronger than pure nickel. The material can be formed through hot rolling or cold drawing, with cold-drawn products exhibiting precision in dimensions and hot-rolled ones possessing greater strength. Notably resistant to the rapid flow of seawater, Monel is particularly well-suited for marine applications. It is easily weldable, machinable, and amenable to cold working. The Monel price per kg varies based on the grade and specific product, and a detailed price list can be obtained by contacting us. Various Monel metal grades are available in the market, each featuring distinct compositions, mechanical properties, and applications. Designated by letters and numbers, grades like Alloy 400, 401, 404, 405, 450, K-500, R-405, and 502 serve specific purposes. The Monel alloy’s chemical composition differs among grades. Alloy 400, for instance, boasts high strength and excellent corrosion resistance, finding applications in hydrocarbon processing, marine contexts, and heat exchangers. Alloy 401 is particularly utilised in electric and electronic applications with compatible brazing properties. Alloy 404, known for low permeability, is employed in electrical and electronic applications, while Alloy 405, despite a less smooth surface finish due to increased sulphur content, is robust and used in automatic screw machines. The applications of Monel alloy vary depending on the specific grades, with R-405, for example, being highly resistant to hydrofluoric and hydrochloric acids in special applications.

Monel Alloy Grades

Monel 400

Monel K500

Monel 405

Types of Monel Alloy

Alloy 400

Alloy 401

Alloy R-405

Alloy 450

Alloy K-500

Alloy 404 Copper-Nickel Alloy

Monel Alloy ASTM Standard

Alloy gradeUNS designationASTM standard
Alloy 400N04400B 127, B 164 / SB 127, SB 164
Alloy 401N04401
Alloy 404N04404B 164/ SB 164
Alloy K-500N05500B 865/ SB 865
Alloy R-405N04405

Monel Alloy Material Specification

Alloy 4002.4360N04400МНЖМц 28-2,5-1,5NW 4400NA 13NU-30MNiCu30Fe
Alloy K5002.4375N05500

Monel Alloy Temperature Range

  • Temperature limit: up to 480 Deg C (896°F)
  • Melting Point: 1300-1350 Deg C (2372-2462°F)

Monel Alloy Applications & Uses

  • Power generation
  • Sea-water applications
  • Commercial Gas Turbines
  • Food Processing
  • Chemical Processing
  • Cryogenic Storage / Pressure vessels Tanks
  • Nuclear reactors

Monel Alloy Chemical Compatibility Chart

DesignationNi%C%Ti%Ai%Co%Cr%V%W%Mo%Cu%Nb/Cb Ta%Fe%Sonstige Autres-Other %
Alloy 40065.00.1232.01.5Mn 1.0
Alloy 40143.00.1053.00.75Si 0.25; Mn 2.25
Alloy 40452.0-  rest/bal0.50Mn 0.10; Si 0.10;S o.024
Alloy 50263.0- 1.5;Si 0.5; S 0.010
Alloy K 50064. 0.8
Alloy R 40566.00.1531.01.2Mn 1.0; S 0.04

Monel Alloy Properties

  • Stronger than steel
  • Highly resistant to corrosion
  • Malleable
  • Low coefficient of thermal expansion
  • Highly resistant to alkalis
  • Suitable for welded, brazed and soldered

Monel Alloy Mechanical Analysis

Tensile strength, Ultimate

Tensile strength, Yield

Elongation at Break

550 Mpa

240 Mpa


Monel Alloy Electrical Properties

Electrical Resistance

Curie Temperature (the temperature above which a ferromagnetic substance loses its ferromagnetism)

5.47e-005 ohm-cm


Monel Alloy Thermal Properties

CTE, linear 20°C

Heat Capacity

Thermal Conductivity

Melting Point



13.9 µm/m- Deg C

0.427 J/g-Deg C

21.8 W/m-K

1300 – 1350 Deg C

1300 Deg C

1350 Deg C


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