Nickel and nickel alloys · Alloy HAYNES 282 / UNS N07208
Haynes 282 Superalloy (UNS N07208): Engineering and Technical Analysis of Properties and Applications
Engineering Analysis of Haynes 282 / UNS N07208 Superalloy
Haynes 282 (UNS N07208) nickel superalloy is a structural material strengthened by dispersion hardening due to gamma-prime (γ') phase precipitation. Its development was aimed at creating an alloy for critical components operating at ultra-high temperatures. Key advantages of the material are the synergy of high creep strength, excellent thermal stability, and weldability. EV Group China's process engineers confirm that the alloy maintains mechanical integrity and resistance to high-temperature oxidation in regimes unavailable to standard heat-resistant steels.
| Forms of supply | International specification |
|---|---|
| Round and flat rolled products, bars, shaped wire | HAYNES 282, UNS N07208 |
| Round and flat rolled products, bars, shaped wire | HAYNES 282, UNS N07208 |
Key operational characteristics
- Balanced chemical composition: A nickel matrix alloyed with Cr, Mo, Co, Ti, and Al forms a stable austenitic structure with dispersed strengthening γ'-phases, ensuring structural integrity under prolonged thermocyclic loads.
- High-temperature resistance: The material demonstrates effective oxidation resistance and maintains strength characteristics at operating temperatures reaching 980°C (1800°F).
- Mechanical strength and durability: The alloy features high resistance to creep and fatigue failure under thermocycling conditions, which is a critical factor for components subjected to high static and dynamic loads.
Main industrial applications
- Aerospace industry: Manufacturing of key gas turbine engine (GTE) components, such as turbine blades, disks, seal rings, and combustion chamber components, operating under extreme temperatures and stresses.
- Industrial energy: Production of stationary gas turbine unit (GTU) components and elements for supercritical steam boilers, where resistance to cyclic thermal shock and creep is required.
- Oil and gas and chemical industries: Application in reactor structures, high-temperature heat exchangers, and piping systems operating in contact with corrosive media at elevated temperatures.
- High-tech welded structures: Manufacturing of critical fasteners and complex welded assemblies where a combination of high specific strength and long service life in aggressive environments is necessary.
The use of Haynes 282 superalloy, supplied by EV Group China, allows engineers to optimize the mass-dimensional characteristics of structures, while simultaneously increasing their efficiency (КПД) and extending the operational life of critical equipment.
Brand chemical composition of HAYNES 282 (UNS N07208), %
| Al | 1.38-1.65 | Mo | 8.0-9.0 |
|---|---|---|---|
| B | 0.003-0.010 | P | <0.015 |
| C | 0.04-0.08 | S | <0.015 |
| Nb/Cb | <0.20 | Si | <0.15 |
| Co | 9.0-11.0 | Ta | <0.10 |
| Cr | 18.5-20.5 | Ti | 1.9-2.3 |
| Cu | <0.10 | W | 0.050 |
| Fe | <1.50 | Ni | Remainder |
| Mn | <0.30 |
Mechanical properties of UNS N07208 alloy at room temperature
| Supply condition / Heat treatment | Solution Annealed | Cold Worked | Cold Worked with subsequent aging |
|---|---|---|---|
| Tensile strength, MPa | 800-1200 | 1300-1600 | 1000-1300 |
Basic physical properties of HAYNES 282
Alloy density at 20°C: 8.27 g/cm³.
Key thermophysical parameters
| Melting temperature interval | Coefficient of linear thermal expansion (in the range 20-100 °C) |
|---|---|
| 1300-1375 °C | 12.1 µm/m·°C |