GH145/GH4145
Chinesegrade: GH145/GH4145 nickel-based deformed superalloy
US grade: InconelX-750
German grade: NiCr15Fe7TiAl
I. Overview of GH145:
GH4145 (GH145) alloy is mainly nickel-basedsuperalloy which is aging strengthened with γ ′ [Ni3 (Al, Ti, Nb)] phase. Thealloy has good corrosion resistance and oxidation resistance below 980 ° C,high strength below 800 ° C, good relaxation resistance below 540 ° C, and goodformability and weldability. The alloy is mainly used to manufacture parts suchas ring parts, structural parts and bolts that require high strength andcorrosion resistance when working below 800 ℃, and flat springs andcoil springs that work below 540 ° C with requirement of moderate or lower stress and relaxationresistance. It can also be used to manufacture parts such as turbine turbineblades. We can supply the alloy in form of sheet, strip, bar, forging, ring,wire and pipe.
II. Chemicalcomposition: %
C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni + Co≥ | Mo≥ | Cu≤ |
0.08 | 0.5 | 1 | 0.015 | 0.01 | 14.0-17.0 | 70 |
| 0.5 |
Other | Co≤ | Al≤ | Ti≤ | Fe≤ | B≤ | Ce≤ | W≤ | Nb + Ta |
1 | 0.40-1.00 | 2.25-2.75 | 5.0-9.0 |
|
|
| 0.70-1.20 |
Note: In the table, Mn and Si represent thecontents of rods, forgings, rings and wires. For plates, strips and pipes, it is listed as following: ω (Mn) ≤0.35%, ω(Si) ≤0.35%.
II. Physical andchemical properties:
1. Thermal performance:
(1) Melting temperature range: 1395 ~ 1425° C.
(2) Thermal conductivity:
θ/℃ | 50 | 100 | 300 | 500 | 900 |
λ/(W/(m · ℃)) | 14.7 | 15.9 | 20.1 | 25.1 | 37.3 |
(3) Linear expansion coefficient:
θ/℃ | 20～200 | 20～300 | 20～400 | 20～500 | 20～600 | 20～700 | 20～800 |
α/10-6 ℃ -1 | 13.1 | 13.5 | 14.1 | 14.4 | 15 | 15.6 | 16.2 |
2. Density: ρ = 8.25g/cm3 [7].
3. Electrical performance: Resistivity ρ =1.22 × 10-6Ω.m [6] at 50 ℃.
