Chinesegrade: GH3030 nickel-based superalloy
Russian grade: ИИ435/XH78T
I. Overview of GH3030:
GH3030 is an early-developed 80Ni-20Crsolid solution strengthened superalloy with simple chemical composition. It hassatisfactory thermal strength and high plasticity below 800 ° C, and has goodoxidation resistance, thermal fatigue, cold stamping and weldability. The alloyconsists of single-phase austenite after solution treatment, and its structuremaintain stable during in operation. We mainly supply the alloy in form ofcold-rolled sheets, however, the deformed products such as rods, rings, wiresand pipes are also available. It is extensively used for turbine enginecombustion chamber parts operating below 800 ℃ and other hightemperature parts that require oxidation resistance below 1100 ℃ butbear small load.
II. Chemical composition: %
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Mo≥ | Cu≤ |
0.12 | 0.8 | 0.7 | 0.03 | 0.02 | 19.0-22.0 | Balance |
|
|
Other | N≤ | Al≤ | Ti≤ | Fe≤ | Co≤ | V≤ | W≤ | Nb≤ |
- | 0.15 | 0.15-0.35 | 1.5 | - | - | - | - |
III. Physical andchemical properties
1. Thermal performance:
(1) Melting temperature range: 1374 ～ 1420 ℃ [3] .
(2) Thermal conductivity
θ/℃ | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
λ/(W/(m · ℃)) | 15.1 | 16.3 | 18 | 19.3 | 20.9 | 22.2 | 23.4 | 25.1 | 26.4 |
(3) Specific heat capacity
θ/℃ | 150 | 200 | 300 | 400 | 500 |
c/(J/(kg.K)) | 565.2 | 598.7 | 674.1 | 741.1 | 820.6 |
(4) Linear expansion coefficient:
θ/℃ | 20-100 | 20-200 | 20-300 | 20-400 | 20-500 | 20-600 | 20-700 | 20-800 | 20-900 |
α/10-6C-1 | 12.8 | 13.5 | 14.3 | 15 | 15.5 | 16.1 | 17 | 17.5 | 18 |
2. Density: ρ = 8.4g/cm3
3. Electrical properties: Resistivity atdifferent temperatures:
θ/℃ | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
Blackness① | 0.17 | 0.17 | 0.18 | 0.18 | 0.19 | 0.27 | 0.51 | 0.52 | 0.53 |
θ/℃ | 20 | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 |
ρ/(10-6Ω.m) | 1.09 | 1.099 | 1.108 | 1.117 | 1.127 | 1.153 | 1.135 | 1.126 | 1.123 |
4. Magnetic properties: non-magnetic.
5. Oxidation resistance: Oxidation rate inair medium:
θ/℃ | 900 | 1000 | 1100 | 1200 |
Oxidation rate/(g/(m2.h)) | 0.0535 | 0.156 | 0.3905 | 0.581 |
