Alloy 59
- ALLOY 59 • UNS N06059
The chemically stable and high-temperature resistant nickel-chromium-molybdenum alloy 2.4605 (alloy 59) is mainly used in the chemical industry, flue gas desulphurisation plants, paper industry.
Alloy 59 is a nickel-chromium-molybdenum alloy with excellent corrosion resistance and high mechanical strength. The alloy has excellent resistance to both oxidizing and reducing media, and possesses superior resistance to chloride pitting and stress corrosion cracking.
The alloy is widely used in the most severe environments. Some applications include: flue gas scrubber components, bleach plant and digester components for the pulp and paper industry, sour gas handling equipment, sulfuric acid coolers, waste incinerators and seawater equipment.
- Available Tube Product form
- Straight
- Coiled
- Seamless
- Seam welded, cold redrawn and annealed
- Typical Applications
- Flue as desulpherisation
- Components exposed to sour gas
- Sulphuric acids reactors
- Evaporators
- Industries predominantly using this Grade
- Chemical processes
- Oil and gas
- Typical Manufacturing Specifications
- ASTM B619
- ASTM B622
- ASTM B626
- Also individual customer specifications.
- Technical Data
Mechanical Properties
| Temper | Annealed | |
| Tensile Rm | 100 | ksi (min) |
| Tensile Rm | 690 | MPa (min) |
| R.p. 0.2% Yield | 45 | ksi (min) |
| R.p. 0.2% Yield | 310 | MPa (min) |
| Elongation (2” or 4D gl) | 40 | % (min) |
Physical Properties (Room Temperature)
| Specific Heat (0-100°C) | 414 | J.kg-1.°K-1 |
| Thermal Conductivity | 10.2 | W.m -1.°K-1 |
| Thermal Expansion | 21.3 | μm/μm/°C |
| Modulus Elasticity | 210 | GPa |
| Electrical Resistivity | 1.26 | Ohm-cm |
| Density | 8.61 | g/cm3 |
Chemical Composition (% by weight)
| Element | Min | Max |
| C | - | 0.010 |
| Si | - | 0.1 |
| Mn | - | 0.5 |
| P | - | 0.015 |
| S | - | 0.01 |
| Al | 0.1 | 0.4 |
| Co | - | 0.3 |
| Cr | 22 | 24 |
| Fe | - | 1.5 |
| Mo | 15 | 16.5 |
| Ni | 56 | 63 |
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