Alloy 59 (UNS N06059 / W.Nr. 2.4605)

Alloy 59 (UNS N06059 / W.Nr. 2.4605) is a nickel-chromium-molybdenum alloy with high mechanical strength and excellent corrosion resistance. The alloy also possesses high resistance to stress corrosion cracking, chloride pitting and oxidizing and reducing media.

Equivalent Grades

Nicrofer 5923 hMoNS3311Alloy 59N060592.4605

Chemical Composition, %

Alloy 59≤0.01≤0.10≤0.50≤0.015≤0.01022.0-24.0Bal≤0.3015.0-16.5≤0.50≤1.50

Typical Physical and Mechanical Properties (RT, Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B574, ASTM B564, ASME SB574, ASME SB564
Plate, Sheet and StripASTM B575, ASME SB575
Pipe and TubeASTM B619, ASME SB619
Welding Product


  • excellent resistance against a multitude of corrosive media under oxidizing and reducing conditions
  • outstanding resistance against chloride-induced pitting and crevice corrosion, as well as resistance against stress corrosion cracking
  • excellent resistance in mineral acids such as nitric, phosphoric, sulfuric and salt acids, but especially against sulfur/salt acid mixtures


Alloy 59 is suitable for a wide spectrum of applications in chemistry, petro chemistry, energy and environmental engineering. Typical applications are:

  • Plant components for organic chemistry processes with media containing chloride, especially where catalytic systems on chloride basis are used
  • Multi-purpose plants in the chemicals industry
  • Plant parts in active substance preparation and the pharmaceuticals industry
  • Scrubber, heat exchangers, flaps, ventilators and agitators for flue gas desulfurization (FGD) in fossil fuel power plants and waste combustion plants
  • SO2-washers for ship diesel engines
  • Components for seawater and concentrated brines
  • Equipment and components for geothermal energy and acid gas applications
  • Reactors for acetic acids and acetic anhydrides
  • Reactors for hydrofluoric acid
  • Sulfuric acid coolers