Nickel and nickel alloys · Alloy 2120 MoN / Nicrofer 5821 hMoN / UNS N06058 / 2.4700

Alloy 2120 MoN (UNS N06058): Engineering Reference Guide to Properties and Applications

Engineering-technical parameters of Alloy 2120 MoN

Forms of supplyTrade names and standardsASTM SpecificationsASME SpecificationsEuropean equivalent (W.Nr.)
Sheet, plate, strip, wireAlloy 2120, Nicrofer 5821 hMoN, VDM Alloy 2120 MoN, UNS N06058B 574, B 575, B 564, B 619, B 6262.4700

Alloy 2120 MoN (UNS N06058) is an advanced nickel-chromium-molybdenum composite material developed with precisely controlled carbon and nitrogen content. The technological processes of EV Group China ensure its application in critical industrial environments requiring exceptional resistance to both oxidizing and reducing aggressive agents, while maintaining high mechanical properties.

Component chemical analysis of Alloy 2120 MoN (%)

NiBase
Cr20.0-23.0
Mo18.5-21.0
Fe<1.5
Cu<0.5
Al<0.4
W<0.3
Co<0.3
Si<0.1
Mn<0.5
N0.02-0.15
S<0.01
C<0.01
P<0.015

Mechanical properties of Alloy 2120 MoN at various temperatures

TemperatureYield strength, Rp0.2, minYield strength, Rp1.0, minTensile strength, minElongation, min
°С°FMPaksiMPaksiMPaksi%
206836052.240058.076011040
40076220029.124034.856081.240
50093218026.122031.953076.940

Physical-mechanical constants of Alloy 2120 MoN

The specific density of Alloy 2120 MoN material under standard conditions is 8.6 g/cm³.

Thermophysical properties

Temperature°С50100200300400500600
Temperature°F1222123925727519321112
Specific heat capacityJ/kg*°C406436457471482487546
Specific heat capacityBtu/lb*°F0.0970.1040.1090.1120.1150.1160.130
Thermal conductivityW/m*°C9.811.113.015.516.918.521.8
Thermal conductivityBtu*in/sq.ft*h*°F5.666.417.518.679.7610.712.6
Electrical resistivityµohm*cm124125125126127129130
Modulus of elasticityGPa-200194188182177169
Modulus of elasticity10⁶ psi-29.028.127.326.425.724.5
Coefficient of thermal expansion10⁻⁶/K11.411.612.212.512.913.213.8
Coefficient of thermal expansion10⁻⁶/°F6.366.426.766.967.177.327.64

Corrosion resistance

Alloy 2120 MoN exhibits outstanding passivity across a wide spectrum of aggressive environments, including both oxidizing and reducing conditions. The synergy of high chromium and molybdenum content forms a robust passive layer, effectively resisting pitting and crevice corrosion, especially in chloride-containing media. In terms of resistance to intergranular corrosion, tested by method A of ASTM G28, this alloy demonstrates performance surpassing traditional C-type alloys.

Recommendations for welding operations

To ensure the integrity and corrosion resistance of the welded joint, it is recommended to use the stringer bead technique. It is critically important to control the interpass temperature, not allowing it to exceed 150 °C (302 °F). The welding heat input (Q) should be calculated using the standard formula: Q = (U × I × 60) / (v × 1000), where U – arc voltage in volts (V), I – welding current in amperes (A), and v – welding speed in cm/min.

Key areas of industrial application

  • Components of Flue Gas Desulfurization (FGD) systems, including scrubbers, absorbers, and ducts, as well as equipment for thermal utilization plants for industrial and municipal waste.
  • Chemical reactors, heat exchangers, and pipelines operating in contact with concentrated mineral acids (H₂SO₄, HCl) and their mixtures, especially in the presence of chloride ions.
  • Equipment for the synthesis of organic acids, such as acetic acid and its anhydride, as well as for processes involving halogen-based catalysts.
  • Apparatus for fine organic synthesis and the production of specialty chemicals, where material inertness to complex multicomponent media is required.
  • Elements of offshore platforms, desalination plants, and systems operating with geothermal and formation waters with high mineralization.
  • Equipment for the extraction and processing of sour natural gas, as well as components of geothermal power plants exposed to aggressive fluids.