Alloy 80A
Material
Alloy 80A, UNS N07080, Ninonic 80A, 2.4631, W.N.2.4952, GH4080A
Note that the designation “Nimonic 80A” is registered trademark of the Special Metals Corporation group of companies.
Overview
Alloy 80A is a wrought, age-hardenable nickel-chromium alloy, strengthened by additions of titanium, aluminum and carbon, developed for service at temperatures up to 815°C (1500°F).
Characteristics
Alloy 80A is nickel-chromium alloy with excellent high temperature strength and creep-rupture propertiescombined with good high temperature corrosion and oxidation resistance.
Application
Alloy 80A is currently used for gas turbine components (blades, rings, washers and discs), bolts, nuclear boiler tube supports, die casting inserts and cores, and for automobile exhaust valves.
Additional applications are connecting elements, exhaust valves in combustion engines and other highly stressed components which are used in the aforementioned temperature range.
Chemical composition (wt%)
| Material | Fe | Ni | Co | Cr | Zr | Ti | Pb | B |
|---|---|---|---|---|---|---|---|---|
| Alloy 80A | ≤1.50 | Balance | ≤2.0 | 18.0-21.0 | ≤0.15 | 1.80-2.70 | ≤0.0025 | ≤0.008 |
| Material | Cu | C | Al | Mn | Si | P | S | |
| Alloy 80A | ≤0.20 | 0.04-0.10 | 1.00-1.80 | ≤1.00 | ≤1.00 | ≤1.00 | ≤0.015 |
Mechanical property
| Tensile strength ksi (MPa) |
Yield strength at 0.2 offset ksi (MPa) |
Elongation at fracture |
|---|---|---|
| 135 (930) | 87 (600) | 20% |
Corrosion resistance
Alloy 80A has a high resistance to oxidation under cyclic temperature changes. The alloy forms a firmly adhering oxide layer (Cr2O3), which protects against progressive corrosion and oxidation attacks. The alloy is resistant to scaling up to 1000°C (1832°F). The material has proven its resistance to vanadium pentoxide, sodium and sulphur compounds for exhaust valves in engines operated with heavy oil.
Available process
Cold worked and bright annealed
Cold worked, bright annealed, polished (MP, EP etc.)
Common tests
- ◎ Chemical composition
- ◎ Tension
- ◎ Hardness
- ◎ Flaring
- ◎ Flange
- ◎ Flattening
- ◎ Micro structure
- ◎ Hydrostatic
- ◎ NDT
- ◎ Intergranular Corrosion
- ◎ Surface condition
- ◎ Shape and dimension
- ◎ Positive Material Identification
Product forms
Capillary tube
- ◎ OD 0.30 ~ 3.0 mm
- ◎ WT 0.05 ~ 0.5 mm
Precision seamless tube
- ◎ OD 3.0 ~ 89 mm
- ◎ WT 0.10 ~ 10.0 mm
HP / UHP BA+ tube
- ◎ OD 3.0 ~ 76 mm
- ◎ WT 0.10 ~ 10.0 mm
Service
- ◎ Precision cutting
- ◎ Tube surface treatment, like ID surface super mirror polishing, best level could reach Ra0.0015um
- ◎ Tube deep processing, like coiling, bending, end forming, body forming, laser processing, various needles processing, built to drawing and sample, etc.