| Customization: | Available |
|---|---|
| Product Type: | Coil |
| Material: | Iron-Nickel-Cobalt Alloy |
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LORK is a alloy manufacturer with 20 years of manufacturing experience.
GH4720Li superalloy (Udimet 720Li in the United States) is a Ni-Cr-Co based deformation superalloy strengthened by precipitation of face-centered cubic γ′-Ni3(Al, Ti) phase. It has high strength, fatigue resistance and creep resistance, good corrosion resistance, oxidation resistance and long-term structural stability between 650~750ºC[1-2]. Therefore, GH4720Li superalloy is mainly used to manufacture high-performance forged turbine disks for aircraft engines used below 750ºC, and can also be used in new generation strategic missiles and high-thrust rocket engine power units. The United States has used this superalloy as a high-performance turbine disk material in advanced aircraft engines such as BR700, EJ200, AE2100, AE3007, T406 and T800[3]. my country began to develop GH4720Li superalloy in 2002. In-depth research has been conducted on the process, structure and performance of this alloy, and it has been applied to more than ten types of advanced aircraft engines.
China GH Series GH4720Li Applications
China GH Series GH4720Li Chemical Composition
| Element | Content (%) |
| Cr | 15.5~16.5 |
| Al | 2.25~2.75 |
| Ti | 4.75~5.25 |
| Co | 14.0~15.5 |
| Mo | 2.75~3.25 |
| W | 1.00~1.50 |
| B | 0.01~0.02 |
| C | 0.01~0.02 |
| Ni | mar |
China GH Series GH4720Li Mechanical Properties
| product | Test temperature | Tensile strength Mpa |
Yield pointσs Mpa |
Elongation after fracture or elongation % |
Sectional shrinkage % |
| Disc forgings | Room temperature | ≥1530 | ≥1100 | ≥9 | ≥10 |
| Disc forgings | 650°C | ≥1350 | ≥1025 | ≥10 | ≥10 |
| Sample | 680°C | High temperature endurance performance: stress 830MPa, creep rupture time ≥30h |
Creep elongation after fracture: ≥5% | - | |
| Sample | 730°C | High temperature endurance performance: stress 530MPa, creep rupture time ≥30h |
Creep elongation after fracture: ≥5% |
- | |
| Sample | 625°C | High temperature creep performance: stress 730MPa, creep elongation time 100h |
Creep elongation: ≤0.13% | - |
| Solid solution | aging |
| 1080~1110°C, within ±10°C of selected temperature, Insulation 4h, oil cooling |
650±5°C, keep warm for 24h, air cool 760±5°C, keep warm for 16h, air cool |
| Test temperature T °C |
Test conditions | Fatigue life Nf week |
| 620 | The test frequency is 0.33Hz, and the stress range is σmin~σmax: 0~1000MPa | ≥10000 |
| 550 | The test frequency is 0.33Hz, and the strain range εmin~εmax is 0~0.66% | ≥50000 |
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
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