Nickel Alloy ZhS26
General Technical Characteristics
ZhS26 is a heat-resistant cast nickel-based alloy designed for manufacturing gas turbine rotor blades, including components with directionally solidified and single-crystal structures. The material is intended for long-term operation under high temperatures and mechanical loads.
Its high-temperature strength is based on the precipitation strengthening of the nickel γ-matrix by γ′-phase particles. Their high volume fraction provides creep resistance and helps maintain mechanical properties at elevated temperatures.
The alloy is used in aerospace and power-generation turbine manufacturing for critical hot-section components.
Chemical Composition
Approximate chemical composition of ZhS26, wt.%:
| Element | Content, % |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | approx. 5.0 |
| Cobalt (Co) | approx. 9.0 |
| Tungsten (W) | approx. 10.0–11.7 |
| Molybdenum (Mo) | approx. 1.1–2.5 |
| Aluminium (Al) | approx. 5.5–5.9 |
| Titanium (Ti) | approx. 1.0–3.0 |
| Niobium (Nb) | approx. 1.5–1.6 |
| Vanadium (V) | approx. 1.0 |
| Carbon (C) | approx. 0.15 |
| Boron (B) | approx. 0.015–0.02 |
The values are based on reference data and scientific publications. The chemical composition may vary depending on the alloy modification, applicable technical standard, and manufacturing process. ZhS26, ZhS26U, and ZhS26-VI should not be considered interchangeable grades. The exact composition must be verified against the relevant standard and the material certificate for the specific batch.
Mechanical and Operating Properties
ZhS26 is characterized by the following properties:
- High strength at elevated temperatures.
- Resistance to long-term creep and deformation under load.
- Stability of the strengthening γ′ phase during high-temperature operation.
- Resistance to thermal stresses.
- Suitability for producing cast components with directionally solidified and single-crystal structures.
For this alloy, long-term strength at elevated temperatures is just as important as short-term mechanical properties. According to published data, the density of ZhS26 is approximately 8.64 g/cm³ for directionally solidified material. Strength values depend on the casting structure, heat treatment, and test temperature.
Applications
Nickel alloy ZhS26 is used in the manufacture of:
- Gas turbine engine rotor blades.
- Aircraft turbine blades produced by directional solidification.
- Single-crystal hot-section components.
- Critical components of power-generation gas turbines.
- Cast parts operating under high temperatures and significant mechanical loads.
Features of Nickel Alloy ZhS26
The main feature of ZhS26 is its high-temperature strength, achieved through multi-element alloying and the formation of a substantial amount of the strengthening γ′ phase. Tungsten and molybdenum increase the strength of the solid solution, aluminium and titanium contribute to the formation of strengthening phases, while cobalt helps stabilize the structure at elevated temperatures.
The alloy is suitable for manufacturing complex cast components that require a long service life, creep resistance, and the retention of mechanical properties under high-temperature operating conditions.
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ASYNT.NET offers heat-resistant nickel alloys for industrial and engineering applications. Contact our specialists to clarify availability, product form, dimensions, and delivery terms. The grade, modification, and chemical composition must be confirmed by the material quality certificate.
