GH1131 nickel based superalloys can be used for a long time at 900 ℃, with high strength and good comprehensive performance. It can also achieve sufficient instantaneous strength even when used for a short time at 1000 ℃. It is a nickel-saving economical high-temperature alloy with a nickel content of about 28%, but its thermal strength level is equivalent to that of GH3044 alloy.
Alloy GH1131 has good hot processing plasticity and welding and cold forming process performance. The main varieties are cold-rolled thin plates, hot-rolled medium plates, bars, flat steel and wires. It can be used to make high-temperature parts of rocket engines that work at 700~1000C for a short time and aircraft engines that work at 700~-750C for a long time.
GH1131 ni based superalloy Chemical composition
|
C |
Cr |
Ni |
W |
Mo |
Fe |
Nb |
B |
Si |
Mn |
P |
S |
N |
|
≤0.10 |
19.0~22.0 |
25.0~30.0 |
4.8~6.0 |
2.8~3.5 |
|
0.7~1.3 |
0.005 |
≤0. 8 |
≤1.2 |
≤0.02 |
≤0.02 |
0.15~0.3 |
GH1131 nickel superalloy physical properties
|
Density (g/cm3) |
Thermal conductivity (20℃) (W/(m•℃)) |
Linear expansion coefficient (20-100℃)(℃-1) |
|
8.33 |
9.6 |
14.72x10-6 |
GH1131 nickel superalloy Mechanical properties
|
Mechanical properties
|
|
|
|
|
|
|
|
| Material Status | Temperature/℃ | Tensile strength бb N/mm2 |
Yield strength б0.2N/mm2 | Elongation δ5/% |
|
|
|
| annealing |
20 |
784－882 |
－ |
34－35 |
|
|
|
|
400 |
676.2－705.6 |
－ |
40 |
|
|
|
|
|
500 |
686 |
－ |
40 |
|
|
|
|
|
600 |
686－735 |
－ |
38－42 |
|
|
|
|
|
700 |
529－637 |
－ |
30－36 |
|
|
|
|
|
800 |
372－392 |
－ |
48－51 |
|
|
|
|
|
900 |
235 |
－ |
66－67 |
|
|
|
|
|
1000 |
127－137 |
－ |
75－104 |
|
|
|
|
|
2. Long-lasting performance
|
|
|
|
|
|
|
|
| Material Status | Temperature /℃ |
б |
τ Hour |
δ |
|
|
|
| annealing |
800 |
107.8 |
435－588 |
20－52 |
|
|
|
|
900 |
51 |
293－300 |
28－31 |
|
|
|
|
|
3. Creep and fatigue properties
|
|
|
|
|
|
|
|
| Material Status | Temperature/℃ | Creep properties | Fatigue performance | ||||
|
б |
τ |
Total deformation % |
Residual deformation % |
б-1 |
N Number of times |
||
| annealing |
800 |
24.5 |
100 |
0.0805 |
0.0704 |
186 |
>107 |
| Annealing + 200h aging |
800 |
34.3 |
100 |
0.1188 |
0.0990 |
186 |
>107 |
|
47 |
100 |
0.1725 |
0.1422 |
186 |
>107 |
||
Available products and standard specifications
Specifications for GH1131 include the following:
GB/T14992 Classification and grades of high-temperature alloys and intermetallic compounds high-temperature materials GB/T14995 High-temperature alloy hot-rolled plates
GB/T14996 High-temperature alloy cold-rolled sheets
GJB1952A Specification for cold-rolled plates of high-temperature alloys for aviation
GJB1954 Specification for cold-rolled sheets of GH1131 high-temperature alloys for aerospace
GJB1955 Specification for hot-forged bars of GH1131 high-temperature alloys for aerospace
GJB2612 Specification for cold-drawn wires of high-temperature alloys for welding
YB/T5245 Hot-rolled and forged bars of high-temperature alloys for ordinary load-bearing parts
HB/Z140 Heat treatment process for high-temperature alloys for aviation
