High temperature alloys
| UNS Number | UNS N07080 |
| Industry Name | Nimonic 80A, Alloy 80A, W.Nr.2.4952 / 2.4631, NiCr20TiAl |
| Product Forms | Billets, Bars, Forgings, Plates |
General Characteristics
Alloy 80A is a wrought precipitation-hardening nickel-chromium superalloy originally developed for early jet engines and industrial gas turbines. Its design intent was to deliver reliable strength and oxidation resistance under sustained high-temperature loading up to around 815°C.
It features excellent high-temperature tensile and creep strength, good oxidation resistance, and fatigue performance. Precipitation of gamma prime phase provides its main strengthening effect.
Compared with Nimonic 90 or Inconel 718, Alloy 80A has lower creep strength, but superior ductility and easier fabrication. In contrast to Alloy 600, Alloy 80A gains much higher high-temperature strength via precipitation hardening.
Ni | Fe | Mn | C | Si | S | Cr | Al | Ti | |
Min | Balance | 18 | 0.5 | 1.8 | |||||
Max | Balance | 3 | 1 | 0.1 | 1 | 0.015 | 21 | 1.8 | 2.7 |
Aero & Gas Turbine ||Turbine blades |Compressor blades |Nozzle guide vanes (NGV)|Turbine discs and wheel segments |Hot-section bolts, studs and fasteners
Industrial Gas Turbine ||Turbine blading assemblies |Exhaust valve spindles and seats
Automotive & Racing Engine||Inlet & exhaust valves |High-temperature valve springs
Petrochemical & Energy||High temperature valve internals |Steam turbine spring elements |Reactor internal spring components
Technical Standards | Product Form |
ASTM B637 | Bar, Forging, Forged Billet, Ring |
AMS 5766 | Bar, Forging, Ring |
BS HR 201 | Plate, Sheet, Strip |
BS HR 601 | Wire, Welding Wire |
AMS 5698 | Spring Wire |
EN 10269 | Bar, Plate, Sheet, Strip, Seamless Tube & Pipe, Wire, Welding Wire |
Product form | Size range (mm) |
Forged bar | Dia.70-500 |
Rolled bar | Dia.2.0-70 |
Flat bar | T4-50*W60-300 |
Wire | Dia.0.25-18.0 |
Plate | 1-25 * ≤1200 * ≤1200 |
Alloy 80A oxidation resistance
θ/℃ | 700 | 750 | 800 |
Oxidation Rate/(g/(m2.h)) | 0.037 | 0.041 | 0.047 |
Alloy 80A thermal conductivity
θ/℃ | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
W/(m·℃) | 12.11 | 13.83 | 15.48 | 16.75 | 18.39 | 20.93 | 23.48 | 25.57 | 27.66 |
Alloy 80A coefficient of thermal expansion
θ/℃ | 16-100 | 16-200 | 16-300 | 16-400 | 16-500 | 16-600 | 16-700 |
α | 12.18 | 12.86 | 13.69 | 14.08 | 14.5 | 14.94 | 15.36 |
Alloy 80A modulus of elasticity
θ/℃ | 18 | 100 | 200 | 300 | 400 | 500 | 600 | 700 |
E/GPa | 222 | 218 | 214 | 206 | 200 | 194 | 189 | 179 |
Nimonic is a registered trademark of high-performance nickel-based alloy developed by Special Metals Corporation.