High-Temperature Alloys / Superalloys
GH4080A (Nimonic 80A) (UNS N07080) — Composition, Properties & Supply
GH4080A is a Ni-Cr base precipitation-hardening superalloy (equivalent to British Nimonic 80A), strengthened by γ′ (Ni₃(Al,Ti)). It offers good creep and oxidation resistance below 800 °C with good hot/cold workability and a low cobalt content for cost control, for turbine blades, discs, high-temperature bolts and springs.
What is the chemical composition of GH4080A (Nimonic 80A)?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ni | Ni | Balance |
| Cr | Cr | 18.0–21.0 |
| Co | Co | ≤ 2.0 |
| Al | Al | 1.0–1.8 |
| Ti | Ti | 1.8–2.7 |
| Mo | Mo | 1.0–1.8 |
| Fe | Fe | ≤ 1.5 |
| C | C | 0.04–0.10 |
| B | B | ≤ 0.008 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of GH4080A (Nimonic 80A)?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 1000 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 600 MPa | Room temperature |
| Elongation | ≥ 20 % | Gauge length 50 mm / 4D |
| Hardness | ≥ 285 HB | Brinell / Rockwell |
What are the physical properties of GH4080A (Nimonic 80A)?
| Property | Value |
|---|---|
| Density | 8.15 g/cm³ |
| Melting range | 1395–1425 °C |
| Thermal conductivity | 11.3 W/m·K |
| Elastic modulus | 214 GPa |
| Maximum service temperature | 800 °C |
What are the key characteristics of GH4080A (Nimonic 80A)?
- Aged room-temperature tensile ≥ 1000 MPa
- γ′ strengthening, creep resistant below 800 °C
- Low-cobalt design for cost control
- Good hot and cold workability
Where is GH4080A (Nimonic 80A) used?
- Gas-turbine blades and discs
- High-temperature bolts, fasteners and springs
- Diesel-engine exhaust valves
- Nuclear and marine high-temperature load-bearing parts
Which standards and specifications cover GH4080A (Nimonic 80A)?
- GB/T 14992
- ASTM B637
- HB 5286
What product forms are available?
Frequently asked questions
What is the standard heat treatment for GH4080A?
Solution treatment at 1080 °C ±10 °C for 8 h followed by oil or water cooling, then ageing at 700 °C ±10 °C for 16 h and air cooling.
Need GH4080A (Nimonic 80A) bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
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