GH80A
Materialgrade: GH80A superalloy
British grade:Nimonic80A
I. Overview of GH80A:
GH80A is a superalloy with nickel-chromiumas matrix and aluminum and titanium added to form γ ′ phase dispersionstrengthening. Except for a slightly higher aluminum content, the alloy issimilar to GH4033 with work temperature of 700 ～ 800 ℃, and good creep resistance and oxidation resistance at 650 ～ 850 ℃ . The alloy has good coldand hot workability and is mainly supplied in form of hot-rolled bars,cold-drawn bars, hot-rolled plates, cold-rolled plates, strips and rings,extensively used in manufacturing of engine rotor blades, guide blade supports,bolts, blade lock plate and other parts.
II. Chemicalcomposition:
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Cu≤ | B≥ |
0.04-0.10 | 0.8 | 0.4 | 0.02 | 0.015 | 18.0-21.0 | Balance | 0.2 | 0.008 |
Other | N≤ | Al≤ | Ti≤ | Fe≤ | Co≤ | Ag≤ | Bi≤ | Pb≤ |
- | 1.0-1.80 | 1.80-2.70 | 1.5 | 2 | 0.0005 | 0.0001 | 0.002 |
Note: B is added in a calculated amount,and the addition of trace amounts of Ce, Zr, Mg is allowed.
III. Physical andchemical properties:
1. Thermal performance:
(1) Melting temperature range: meltingpoint 1405 ° C.
(2) Thermal conductivity:
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Cu≤ | B≥ |
0.04-0.10 | 0.8 | 0.4 | 0.02 | 0.015 | 18.0-21.0 | Balance | 0.2 | 0.008 |
Other | N≤ | Al≤ | Ti≤ | Fe≤ | Co≤ | Ag≤ | Bi≤ | Pb≤ |
- | 1.0-1.80 | 1.80-2.70 | 1.5 | 2 | 0.0005 | 0.0001 | 0.002 |
(3) Coefficient of linear expansion:
θ/℃ | 16～100 | 16～200 | 16～300 | 16～400 | 16～500 | 16～600 | 16～700 |
α/10 -6 ℃ -1 | 12.18 | 12.86 | 13.69 | 14.08 | 14.5 | 14.94 | 15.36 |
2. Density: ρ = 8.15g/cm 3 .
3. Electrical performance: room temperatureρ = 1.23 × 10 -6 Ω.m.
4. Magnetic properties: non-magnetic.
