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
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
| Nicrofer 5923 hMo | NS3311 | – | Alloy 59 | N06059 | – | 2.4605 | – | – | – | – |
Chemical Composition, %
| Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Mo | Cu | Fe |
| Alloy 59 | ≤0.01 | ≤0.10 | ≤0.50 | ≤0.015 | ≤0.010 | 22.0-24.0 | Bal | ≤0.30 | 15.0-16.5 | ≤0.50 | ≤1.50 |
Typical Physical and Mechanical Properties (RT, Annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
| 8.6 | 1380-1420 | ≥690 | ≥310 | ≥45 | / |
Available Products and Specifications
| Rod, Bar, Wire and Forgings | ASTM B574, ASTM B564, ASME SB574, ASME SB564 |
| Plate, Sheet and Strip | ASTM B575, ASME SB575 |
| Pipe and Tube | ASTM B619, ASME SB619 |
| Welding Product | – |
| Others | – |
Features
- 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
Applications
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
