GH4080A (GH80A) Nickel-Based AlloyGH4080A (also designated GH80A) is a Chinese Ni-Cr base precipitation-hardened wrought superalloy, the domestic equivalent of Nimonic 80A (UK). Strengthened by g
GH4080A (also designated GH80A) is a Chinese Ni-Cr base precipitation-hardened wrought superalloy, the domestic equivalent of Nimonic 80A (UK). Strengthened by gamma-prime precipitation through aluminium and titanium additions, with boron and cerium used to strengthen grain boundaries, it offers high tensile and creep-rupture strength, good oxidation resistance and stable microstructure for long-term service at 700–800 °C.
| Element | Cr | Ni | Mo | Al | Ti | B | Fe | Mn | Si | C | Ce | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Content | 18.0–21.0 | Bal. | 1.0–1.8 | 1.0–1.8 | 1.8–2.7 | 0.008–0.020 | ≤ 2.0 | ≤ 0.40 | ≤ 0.80 | 0.04–0.10 | ≤ 0.010 | ≤ 0.020 | ≤ 0.015 |
| Property | Typical Value |
|---|---|
| Density | 8.14 g/cm³ |
| Melting range | 1395–1425 °C |
| Thermal conductivity | 11.3–24.3 W/(m·K) (100–800 °C) |
| Electrical resistivity | 1.12 Ω·mm²/m (at 100 °C) |
| Coefficient of thermal expansion | 13.2 ×10-6 /K (25–800 °C) |
| Modulus of elasticity | 214 GPa at 20 °C; 180 GPa at 600 °C; 172 GPa at 700 °C |
| Magnetic properties | Non-magnetic |
| Condition | Tensile strength | Yield strength (Rp0.2) | Elongation |
|---|---|---|---|
| Room temperature | ≥ 1080 MPa | ≥ 685 MPa | ≥ 15 % |
| 700 °C | ≥ 880 MPa | ≥ 590 MPa | ≥ 10 % |
High tensile and rupture strength at 700–800 °C. Actual values may vary with condition and governing standard.
For detailed datasheets, mill certificates or inquiries on specific sizes and tolerances, please contact our sales & engineering team.
