- Top Star Metal Materials Co.,Ltd
UNS N07750
Standard:ASTM B637
Density:8.28 g/cm3
Melting point:1393-1427℃
The -750 alloy is mainly a nickel-based superalloy that is age-strengthened by the γ”Ni3 (Al, Ti, Nb) phase. It has good corrosion resistance and oxidation resistance below 980°C, and has high strength below 800°C. 540 It has good relaxation resistance below ℃, and also has good formability and welding performance.
| Element | Ni | Cr | Fe | C | Mn | Si |
| Content（%） | 70 | 14-17 | 5-9 | <0.08 | <1 | <0.5 |
| Ti | Nb+Ta | Al | Co | Cu | S | |
| 2.25-2.75 | 0.7-1.2 | 0.4-1 | <1 | <0.5 | <0.01 |
This alloy is mainly used in the manufacture of plane springs and coil springs that are resistant to relaxation and require high strength for aero-engines that work below 800°C. It can also be used to manufacture steam turbine blades and other parts.
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